19 90ApJS. . .72. .5 67G with cosmictime(Schmidt1968;SchmidtandGreen1983). The number-fluxrelationshipandtheluminosityfunction of best toolfortheinvestigationoftheirevolutionaryproperties ples ofastronomicalobjectswhichcanbeextractedfrom Subsequent studiesofindividualpeculiarsourcescanreveal Galactic andextragalacticsourcesyieldimportantinforma- unbiased andfullyidentifiedsurveysgiveimportantinforma- tion ontheirrespectivedensitiesandspatialdistributions. Arizona andtheSmithsonianInstitution. tions. Completesamplesofextragalacticobjectsprovide the tion onthenatureanddistributionofdifferentpopula- Observatory (MMTO),whichis operated jointlybytheUniversityof © 1990.TheAmericanAstronomicalSociety.Allrightsreserved.PrintedinU.S.A. The AstrophysicalJournalSupplementSeries,72:567-619,1990March 2 x A1so fromIstitutodiRadioastronomia delCNR,Bologna,Italy. Statistical analysesofflux-limitedandhomogeneoussam- This paperusesdataobtained at theMultipleMirrorTelescope 142- -142 previous resultsfromtheMedium-SensitivitySurveysamples,activegalacticnucleidominateextragalactic is underway.Asof1989June,91%thesamplesourceshasbeenidentified.Aclassificationassigned has beencovered.ThedatahaveanalyzedusingtheREVIprocessingsystemimplementedafewyearsago in the0.3-3.5keVenergyband.Atotalareaof778squaredegreeshighGalacticlatitudesky(|fr|>20°) number-counts relationisbestfittedbyapowerlawofslope=1.48+0.05. component, followedbyclustersofgalaxies,BLLacertaeobjectsand“normal”galaxies.About27%the objects thatcanbeusedforstatisticalstudies.Anopticalprogramtoidentifythe835sourcesspectroscopically sources. TheresultingEMSScatalogofX-raysourcesisaflux-limitedandhomogeneoussampleastronomical sources aredescribed,aswellthedetectionalgorithmsusedtodetermineexistenceandlocationof away fromtheGalacticplane.Theirlimitingsensitivitiesrange-5X10“to—3ergscms detected atorabove4timesthermslevelin1435imagingproportionalcounter(IPC)fieldswithcenterslocated Subject headings:BLLacertaeobjects—galaxies:nucleiX-raysstars:X-rays:sources sources persquaredegree(25,146^^20sterad)at/=7XlOergscms(0.3-3.5keV).The EMSS sourcesareGalactic.TherevisedestimateofthesurfacedensityextragalacticX-rayis7.7 to theremainingsourcesbasedonratioofX-rayvisualfluxasdescribedinpaper.Inagreementwith field” whichtakesintoaccountthenonuniformitiesofdetector.Theselectioncriteriaforfieldsand at theCenterforAstrophysics.Thissystemmakesuse,eachIPCimage,ofabackgroundmap,kind“flat Observatory ExtendedMedium-SensitivitySurvey(EMSS).Thesurveyconsistsof835serendipitoussources c a) PublishedMedium-SensitivitySurvey This paperpresentstheresultsofanalysisX-raydataandopticalidentificationforEinstein © American Astronomical Society • Provided by theNASA Astrophysics Data System THE EINSTEINOBSERVATORYEXTENDEDMEDIUM-SENSITIVITYSURVEY. I. INTRODUCTION 2 The ObservatoriesoftheCarnegieInstituteWashington,Pasadena,California I. M.Gioia,T.Maccacaro,R.E.Schild,andA.Wolter Harvard-Smithsonian CenterforAstrophysics,Cambridge,Massachusetts Center forAstrophysicsandSpaceAstronomy,Boulder,Colorado 1 I. X-RAYDATAANDANALYSIS Received 1989March6;acceptedAugust10 Institute forAstronomy,Honolulu,Hawaii S. L.Morris J. T.Stocke ABSTRACT J. P.Henry AND 567 possible. Inaddition,atany givenX-rayfluxf,theareaof latitude X-rayskyatfluxesintermediatebetween the unbiased statisticalstudies of theirpropertiesaretherefore with theimagingproportionalcounter(IPC)onboard the was accomplishedbyanalyzingobservationsofserendipitous flux-limited X-raycatalogof fullyidentifiedfaintsources; carrying outasystematicinvestigationofthehighGalactic MSS projectwasinitiatedseveralyearsagowiththeaim of complete samplewhichhasbeenusedforthisscienceisthe ously unknownclassesofobjects(e.g.,Spinrad1987).One cacaro etal.1982;Stockeetal1983)andsecond(Gioia Einstein ObservatoryMedium-SensitivitySurvey(MSS). The the presenceofnewphenomenaandexistenceprevi- above, answeredmanyquestions, andopenednewones. Einstein Observatory(Giacconietal1979).Thefirst(Mac- sources intheenergyrange0.3-3.5keV,detectedat>5 rms 1984) MSSsamplesaddressedseveralofthestudiesoutlined Uhuru/Ariel VlimitandtheEinsteinDeepSurveylimit.This x The publishedMSSsample is uniqueinthatitalarge, 19 90ApJS. . .72. .5 67G program ofopticalandradio observationsoftheX-ray reprocessed withtheREVIprocessing system(Hamdenetal. were alreadypresentintheMSS,aswelldetectingmany published MSS(Gioiaetal.1984).TheEMSSisnotsimply within theEinsteindatabank. ior ofthedifferentclassesX-ray-selectedobjects.Wehave would giveusamoresatisfactoryunderstandingofthebehav- identified asopticalcounterpartstoMSSsourceswehave isotropic emission,BLLacobjectsarecharacterizedbya log N{>S)-logScurvesfortheextragalacticpopulationasa 568 ground determinationhaveallowed ustolowerthedetection old MSSsourcesarenotpresentintheEMSS.Thequality of new sources.In§IVZ?wediscussindetailwhysomeof the used intheMSSsurveyandredetectedmostsourceswhich required forquasars(Maccacaroetal1984;Stockeetal number ofBLLacobjectsfoundintheMSS,theirunusual whole, andforAGNs(activegalacticnuclei=quasars This hasmadepossiblethedeterminationofX-ray threshold toasignificanceof 4rms.Wehavecarriedona contains about8timesasmanysourceswerein the criteria describedinthenextsection.TheresultingEMSS emitters, areseverelyunderrepresented,sincetheMSSavoids class ofobjects.Thus,itisnotsurprisingthatamongthestars constitutes -25%ofthetotalnumberX-raysourcesin cosmological evolutionsmaller,ifatallpresent,thanthat obtain onlypreliminaryresults.However,despitethesmall mined andusedtomakeadirectestimateofthecontribution 1984). Theimproveddetection algorithmandIPCback- the datahasimproved,sinceallIPCimageshavebeen an extensionoftheMSS:wehavealsoreanalyzedfields analyzing alltheIPCobservationsthatmeetselection therefore undertakentoincreasethesizeofsurvey,ex- sources. Itisevidentthattheanalysisofalargersample type binaries,andevenacataclysmicvariable.Theseobjects found KandMdwarfflarestars(dKedMe),RSCVn that sample.Beingaserendipitoussample,thesurveycon- flux distributionsuggestedthat,underthehypothesisof and BLLacobjects,thestatisticsavailableallowedusto galactic objectspresentinX-raysurveys,clustersofgalaxies from AGNstothediffuseX-raybackground(Maccacaro, function anditsevolutionwithcosmictimehavebeendeter- separately (Gioiaetal.1984;Maccacaroal1984).Using tending thesearchforsourcestoallappropriateIPCimages the IPCfieldsinGalacticplane. sequence andOBstars,whicharealsostrongX-ray Golub, andVaiana1985referencestherein).Pre-main- standards, frompreviousobservationalstudies(cf.Rosner, are alreadyknowntobestrongX-rayemitters,bystellar tains preferentiallythebrightestX-rayemittersamongany 1982). Gioia, andStocke1984).Fortheothertwoclassesofextra- the redshiftinformationavailable,AGNX-rayluminosity Seyfert galaxies),clustersofgalaxies,andBLLacobjects, sky searchedforsourcesbrighterthanfhasbeenrecorded. x The MSSsamplecontainedonly112serendipitousX-ray The GalacticcomponentofthepublishedMSSsample Since 1984wehavebeenworkingonextendingtheMSSby b) ExtensionofMedium-SensitivitySurvey © American Astronomical Society • Provided by theNASA Astrophysics Data System GIOIA ETAL. 142 -21 13 21 TECT, XDETECT,andMDETECT(thelocalbackground, with centerslocatedoutsidetheGalacticplane(|fr|>20°) to mn. Whenunusuallyintensediffuseemissionispresentwithin mented intheREVIprocessing;Hamdenetal.1984)were density. AmongthesehighGalacticlatitudefieldswehave most, oftheall-skysurveysourceswillnotbefeasible.Even instance, logN-logSinthe0.1-2.5keVband(cf.Zamorani reference toaprecomputed backgroundmap.Theback- extended emission,andmapbackgroundalgorithmsimple- selected onlythosewhereallthreedetectionalgorithmsLDE- avoid regionsofhighGalacticabsorptionandstellar limiting sensitivitiesrangefrom-5x10“to-3X10“ images. TheIPCfieldofviewis-1squaredegree,but etal. 1988).Thespectroscopicidentificationofall,oreven detected byROSAT.Atthisrelativelysofterenergyband,the Thus ordinarystarswillbethelargestclassofX-raysources ground maptakesintoaccount allthenonuniformitiesof of sources.MDETECTdetermines itsdetectionthresholdby from running,sinceitwilldetect unreasonablylargenumbers the image,XDETECT algorithm preventsMDETECT results (Giommi,Tagliaferri,andAngelini1988)canbeused EMSS andtheEXOSATHighGalacticLatitudeSurvey complete sampleofidentifiedX-ray-selectedobjectsavailable Thus, uponcompletionoftheopticalidentificationprocess, significantly largerthantheEMSSmayrequireseveralyears. absorption, whichmaycreateproblemswhencomputing,for PSPC willalsobemoresensitivetotheeffectsofGalactic ergs cms.Thesofterenergyband(0.1-2.5keV)atwhich (about 100,000)downtoalimitingsensitivityofabout10“ Einstein IPC,willdetectaverylargenumberofX-raysources Counter (PSPC;Tmmper1984),aninstrumentsimilartothe satellite (1990)withthePositionSensitiveProportional of 835serendipitoussourceshavebeendetectedatorabove ergs cm“s“inthe0.3-3.5keVIPCband.Atotalnumber of thewindow-supportingstructure.Theexposuretimes only apartofithasbeenused,becausetheshadowing the identificationofasamplefaintsourcessize Galactic latitudesky,resultingfromtheanalysisof1435IPC to theastronomicalcommunityforseveralyearscome.The the EMSScatalogwillbelargestandmoststatistically the PSPCoperateswillfavordetectionofGalacticobjects. of them.Thenumber-fluxrelationforextragalacticX-ray reported elsewhere(Stockeetal.1990¿z),aswilltheresultsof the 4rmslevel. the IPCobservationsrangefrom~800to-40,000s;their to predictthecontentofROSATall-skysurvey. sources isderivedanddiscussed. sources. Theopticalprogram,undertakentoidentifyallthe the finalEMSSsampleandopticalidentificationsfor91% sources spectroscopically,isstillinprogress,anditwillbe 1990). ThispaperpresentstheX-raydataforsourcesof the 6cmVLAobservationsofover500objects(Gioiaetal. We searchedtheentireIPCEinsteindatabankforfields The all-skysurveywhichwillbeperformedbytheROSAT The EMSScoversanareaof778squaredegreesthehigh II. THESELECTIONCRITERIAOFEMSS a) IPCFieldSelection Vol. 72 19 90ApJS. . .72. .5 67G -1 the survey. ecliptic polesurvey. northern andsouthernhemispheres.Theclusterofpointings where atleastoneserendipitoussourcewasdetected.The allows ustoestimatetheminimumdetectableflux(limiting at aboutb=30°,/100°representsIPCfieldsofthenorth bers fortheIPCimagesusedinwhichnoserendipitoussource Galactic coordinatesinFigure2,isfairlyuniformboththe distribution ontheskyof1435IPCfields,shownin was detected.Table3(col.[9])liststheremainingsequences, 618 areguestobservers’images.Table1listssequencenum- of theEinsteinconsortium(CfA,Columbia,MIT,GSFC), preferred andanalyzed.Outof2136high-latitudefieldsin- poor thattheydonotcontributesignificantlytothesky spected, wehaveused1435IPCfields:817areobservations coverage ofthesurvey.TheIPCexposuretimedistributionis produced reliably,andtopreventincludinginthesurvey vent usingimageswherethebackgroundmapcouldnotbe shown inFigure1.Themeanexposuretimeis3500s.When IPC exposuresshorterthan800s,sincetheirsensitivityisso the longerexposure,withadeepersensitivity,wasusually two ormoreobservationswerecenteredonthesametarget, § libbelow.Wehavealsoexcludedfromthesurveyall serendipitous. Possiblecompletenessbiasesarediscussedin sources physicallyrelatedtothetargetandthusnottruly distance classD<3.Theseexclusionswerenecessarytopre- of nearbygalaxies,starclusters,orstellarassociationssuchas galaxies; (2)groupsand/orassociationsoftargets,e.g., e.g., supernovaremnants,veryrichandnearbyclustersof (1) verybright(>0.6countss)and/orextendedtargets, the HyadesorPleiades;and(3)allAbellclusterswith nation ofthesignal-to-noiseratioandfluxestimate background levelencounteredintheIPCimagesandthus, detected sourcesandminimizesthenumberofspurious No. 3,1990 compared withaflatbackground,providesbetterdetermi- sources. Fig. 1.—Histogramoftheexposure timesfortheIPCimagesusedin The existenceofabackgroundmapforeachIPCimage We haveexcludedfromtheEMSSthosefieldscenteredon © American Astronomical Society • Provided by theNASA Astrophysics Data System EINSTEIN EXTENDEDMEDIUM-SENSITIVITYSURVEY , -9 5 / 12 cell (2/4x2.4)aswellthe averagecorrectionsCthatare printed whichcontainstheshadowingstatusofeachdetected applied tothenetcounts estimatethetotalcountspro- sources. Thisrequirementdetermines thesizeofdetection more thanoneofthe9subcellsshadowed,sincecounting degraded. Thecorrespondingareaofthedetectorwhere the source. Wehaveexcludedfromthesurveyallsources with shadowing takesplacehasalso beenremoved. statistics associatedwiththesourcecouldbesignificantly are shadowedbytheribsoredgesofdetector,aflag is is showninFigure3.Thirty-ninepercentofthesourceshave individual sources. between 5and6.Consequently,forthemajorityof the been detectedwithS/Nbetween4and519% broad-band analysis.Netcountsinadetectioncellarecom- have beenintroducedtocopewiththeIPCtemporaland implies thataminimumof23netcountshavetoberecorded puted bysubtractingthebackgroundcalculatedMDE- we haveconsideredonlytheinformationextractedfrom broad (0.2-3.5keV),eachwithanoptimumdetectioncell more when9areexpectedis2.2X10.Thismuchsmaller cepted ifthesignificanceofdetectionequalsorexceeds4 TECT algorithmfromtheobservedcounts.Sourcesareac- energy bands:soft(0.2-0.8keV),hard(0.8-3.5keV)and sources limitedcountsareavailableforadetailedanalysis of statistics (6X10“).TheS/Ndistributionfordetectedsources distribution theprobabilityofobserving32totalcountsor on topofthe9averagebackgroundcounts.ForaPoisson spatial gainchanges.ForthedefinitionofEMSSsample IPC imagesaresearchedinthreepulse-height-invariant(PI) existence andlocationofsources.IntheREVIprocessing, region oftheimagewhichismuchlesssensitivethan crease linearlywiththearea,sincewearenowsamplinga region aroundthetargetanditselfwerealsoomit- by differentsensitivities.Thuswehavebeenabletoextend than theprobabilityassociatedwith4alevelinGaussian average IPCexposureof3500stherequirementS/N=4 acceptance ofsourcesinthesurvey).Wenotethatforan size. AsdiscussedinHamdenetal.(1984),thePIenergybins p central part. sources detectedinthenewsurveydoesnot,however,in- detected therearehighlyuncertain.Thecentral5'radius omitted fromthesurveybecausefluxestimatesforsources MSS. Theareashadowedbythewindow-supportingribswas of restrictingittothecentral32'X32region,asinold 1987 forajustificationofthechoice4rmsthreshold times theS/Nleveldefinedas[sourcecounts/(sourcecounts searched forsourcesis~0.6squaredegreescomparedwith ted unlessthefieldwasmispointed.ThenetareaperIPC the searchforsourcestoentireIPCfieldofviewinstead sensitivity) acrossanIPCimage,properlytakingintoaccount the factthatdifferentregionsofdetectorarecharacterized + background)/](seeMaccacaro,Romaine,andSchmitt -0.3 squaredegreesutilizedintheMSS.Thenumberof The detectionalgorithmhas beenoptimizedforpointlike When oneormoreofthe3Xsubcellsdetectioncell An automaticdetectionsystemwasusedtoestablishthe b) SourceDetectionandSelection 569 19 90ApJS. . .72. .5 67G 814 846 845 842 840 835 861 858 853 852 851 812 807 801 794 306 213 212 211 209 207 206 247 228 225 223 215 205 154 793 792 791 787 562 553 415 334 329 317 265 264 252 239 233 229 147 542 541 538 425 421 148 133 521 487 467 463 462 460 454 430 427 520 518 497 495 491 478 470 444 443 433 502 494 439 2130 2121 2146 2144 2134 2129 2127 2123 2110 2239 2228 2109 2092 2085 2077 2074 2064 2058 2057 2052 1810 1767 1092 1091 2046 2035 2031 2030 1812 1811 1768 2028 1847 1839 1838 1827 1813 2026 2018 1866 1859 1852 2015 2009 1927 1910 1883 1873 2006 1998 1989 1987 1985 1983 1979 1975 1932 1971 1969 1959 1956 1945 1941 1937 1935 1934 1943 933 916 915 948 893 887 885 863 List ofIPCImagesinWhichNoSerendipitousSourcesWereDetected © American Astronomical Society • Provided by theNASA Astrophysics Data System 3070 3041 3040 3061 3056 3042 3037 3035 3034 3032 3026 3078 3024 3018 3023 2949 2911 2727 2720 2718 2261 2716 2710 2300 2289 2270 2266 2260 2255 2253 2712 2702 2493 23*5 2332 2318 2312 2243 2240 2701 2693 2690 2603 2600 2492 2480 2388 2251 2688 2687 2617 2605 2504 2686 2685 2682 2662 2660 2629 2625 2616 2615 2612 2607 2658 2656 2654 2653 2649 2644 2642 2633 2632 2640 2638 3464 3454 3450 3467 3453 3452 3449 3441 3440 3368 3367 3360 3357 3356 3355 3321 3307 3297 3296 3111 3110 3092 3090 3294 3293 3290 3284 3269 3148 3144 3143 3121 3114 3105 3094 3089 3086 3085 3267 3264 3174 3151 3150 3149 3080 3263 3261 3260 3186 3185 3179 3178 3176 3175 3259 3257 3256 3239 3202 3189 3181 3180 3258 3242 3240 3229 3224 3220 3218 3217 3207 3204 3199 3216 3215 4078 4062 4060 4088 4086 4085 4084 4058 4057 4047 4055 4042 4037 4036 4022 4020 4016 4014 4003 4002 4001 3999 3998 4000 3997 3536 3509 3477 3995 3993 3991 3718 3580 3556 3551 3550 3547 3534 3533 3531 3476 3470 3468 3989 3895 3814 3811 3727 3653 3638 3581 3471 3988 3985 3984 3979 3906 3902 3898 3897 3977 3975 3971 3968 3966 3963 3962 3929 3922 3918 3911 3908 3965 3959 3936 4949 4946 4972 4960 4958 4950 4945 4974 4940 4939 4938 4937 4933 4929 4928 4926 4920 4925 4922 4900 4896 4889 4251 4233 4194 4145 4144 4116 4895 4621 4620 4417 4416 4263 4261 4256 4253 4148 4147 4143 4119 4113 4619 4616 4615 4443 4441 4433 4423 4414 4374 4608 4606 4603 4455 4453 4451 4450 4604 4600 4580 4557 4551 4546 4529 4525 4523 4499 4470 4457 4575 4550 4549 4528 4527 TABLEI 5571 5562 5559 5606 5567 5565 5564 5545 5539 5538 5537 5512 5507 5475 5473 5450 5433 5430 5418 5412 4992 4981 5411 5407 4988 4983 4979 5408 5406 5404 5103 5064 4982 5396 5125 5124 5122 5118 5115 5061 5022 5388 5386 5192 5184 5142 5141 5127 5126 5383 5378 5230 5229 5228 5227 5191 5158 5382 5380 5367 5365 5361 5355 5337 5334 5258 5256 5255 5254 5248 5363 5354 5339 5281 5280 570 6695 6703 6700 6699 6696 6691 6687 6706 6685 6683 6681 6675 6670 6663 6667 6646 6644 6643 6496 6475 6473 6470 6472 6464 5657 6449 6444 6440 5734 5670 5669 5667 5661 5650 5646 5637 5631 5619 6407 6402 5771 5769 5768 5733 5719 5705 5697 6365 6349 6344 5796 5791 5782 5776 5744 6363 6339 6338 6328 6327 6318 6220 6118 6037 6004 6000 5807 5800 5799 5988 5987 5985 5951 5932 5952 7431 7481 7427 7426 7424 7408 7406 7405 7404 7400 7363 7328 7309 7306 7299 6740 6739 6731 6729 7277 7276 7206 7203 6746 6744 6743 6741 6738 6734 6733 6728 6724 6723 6708 7208 7193 7174 6809 6802 6799 6747 7185 7172 7169 6875 6869 6854 6842 6820 7166 7165 6892 6888 6881 6879 6877 6876 7151 7149 7131 6953 6895 7137 7129 7128 7127 7123 7121 7118 7062 7042 7028 7125 7116 7040 7912 7906 7895 7923 7915 7913 7909 7894 7886 7889 7884 7878 7842 7829 7841 7827 7823 7814 7802 7579 7525 7519 7517 7509 7508 7800 7606 7593 7585 7582 7518 7499 7489 7487 7483 7796 7790 7612 7610 7609 7607 7791 7778 7776 7632 7620 7619 7617 7772 7771 7770 7664 7661 7660 7636 7635 7764 7759 7669 7668 7762 7756 7749 7747 7735 7728 7710 7686 7680 7679 7741 7720 7711 7682 7681 8872 8890 8885 8880 8874 8870 8866 8864 8891 8855 8850 8848 8838 8837 8831 8824 8362 8361 8360 8347 8047 8019 8816 8813 8799 8786 8384 8382 8365 8364 8332 8774 8396 8393 8386 8385 7987 7955 8772 8767 8759 8422 8413 8409 8400 7958 7951 8756 8754 8431 8429 8428 8427 8752 8748 8740 8437 8433 8432 8736 8734 8696 8455 8451 8735 8694 8691 8665 8658 8652 8649 8572 8462 8460 8693 10464 10393 10397 10382 10352 10310 10308 10228 10201 10198 10159 10157 10148 10129 10119 10122 10116 10109 10107 10105 10100 10093 10082 10087 10074 9030 9027 8993 8989 9113 9053 9051 9050 9049 8991 8990 8957 8925 8918 8894 8893 9101 9091 9065 9130 9125 9121 9120 9114 9146 9145 9134 9133 9162 9154 9977 9528 9204 9163 9968 9961 9690 9680 9667 9553 9471 9389 9225 19 90ApJS. . .72. .5 67G duced bythesourceforpurposeoffluxmeasurements. detected off-axis. (1.18), thepoint-responsefunction correctionfactor(1.13), For unresolvedsources,three correctionshavebeenapplied and thevignettingcorrection factor,whichisequalto1for to thenetcounts:mirror scatteringcorrectionfactor sources on-axisandincreases toasmuch3forsources © American Astronomical Society • Provided by theNASA Astrophysics Data System Fig. 2.—DistributionofIPCimagesusedintheEMSSGalacticcoordinates EINSTEIN EXTENDEDMEDIUM-SENSITIVITYSURVEY571 S it dependsonthesourceprofile (e.g.,Gaussian,Kingmodel) counter. Thiscorrection,however, ismodel-dependent,since solved source.Adifferentcorrection, Q,shouldthenbeused that fallsinthedetectioncell issmallerthanforanunre- to computethefluxinorder to takeintoaccountproperlythe total numberofcountsthat the sourcehasdepositedin If asourceisextended,thefractionofcounts 19 90ApJS. . .72. .5 67G 572 bining theuncertaintyduetophoton-countingstatisticswith vignetting correction). with differenta,andKingmodelß=0.65 higher thantheminimumdetectablefluxofpointlikesources. by afactorK(s,0)whichdependsontheshape5andsize6 provided thatthesamenumberofcountsfallswithin much smaller,typicallyoftheorder4"(90%confidence position withintheIPCdetector.High-resolutionimager core radii).Thesourceisassumedtobeon-axis(i.e.,no of extendedsourcesdifferentshapesandsizes(Gaussian background isdeterminedfromthemap,andnot (HRI) detectionsareavailablefor36sourceswithinthe range of35"-70"dependinguponthesourcestrengthand radius ofthe90%confidenceerrorcircleaveragedover quantified. Wecomparetheminimumdetectablefluxina quires theknowledgeofdistributionshapesandsizes complicated, model-dependent,table.Itscomputationre- N >(b,S/N)countsina2/4XregionforgivenIPC of theextendedsource.Thisimpliesthatminimumde- order toproduceN>(b,S/N)countsinthedetectioncell, detection cell.Whatisdifferentinthetwocasesthat, estimate isnotaffectedbythesourcepresenceandextension. given S/Ndependsonthebackgroundlevelb.Since number ofcounts,V,(Z>,S/N),neededtodetectasourceat sources, sincethepositionalerrorassociatedwiththemis survey. TheHRIpositionshavebeenpreferredforthese 746 unresolvedsources(IPCpositionsonly)is50"andhasa 5000 sIPCobservationforapointlikesourceandnumber for theanalysisofextendedsourcesthusbecomesarather observation, thissourcecanbedetectedregardlessofits In otherwords,ifasourceis“brightenough”todeposit an extendedsourcehastobebrighterthanapointlike For thisreasontheefficiencyofdetectionsourcesis,infirst from aregionimmediatelysurroundingthedetectioncell,its as wellonthesourcesize.Thethresholdvaluefor the uncertaintyduetoresidualdistortionsindetector.The the sourcesunderinvestigation.InTable2thiseffectis surface brightnessdistribution.Theskycoverageappropriate tectable flux(limitingsensitivity)forextendedsourcesis approximation, thesameforpointlikeandextendedsources, t t Positional errorshavebeencomputedforeachsourcecom- © American Astronomical Society • Provided by theNASA Astrophysics Data System net countsareneededinthedetection cellfor a S/N=4detection. tion, 5000sexposure,on-axisdetection; 24 Limiting SensitivityforPointlikeand a21 In unitsofergscm“s“.IPCobserva- King model: Gaussian: Pointlike Source Type ß =0.65,a120" ß =0.65,a90" ß =0.65,a46" ß =0.65,a23" a =120" a =90" a =46" a =23" Extended Sources TABLE 2 13 13 13 13 13 13 13 13 12 4.2X10“ 7.4X10“ 3.0X10“ 8.9X10“ 5.1 X10“ 2.9X10“ 2.2X10“ 2.0X10“ 1.0X10“ a /i im GIOIA ETAL. 20 -2 IPC imagesusedinthesurvey. Zamorani etal.1988;Maccacaroetal.1988).Figure4shows hydrogen columndensityvaryingfrom1.2X10to7.7 cm, thebiasinsourceselectionisentirelynegligible(see characterizes thedifferentIPCpointingdirectionsdoesnot sight totheIPCpointingsofEMSS,derivedfromHi the distributionofvariousAvaluesalongline survey. Since88%oftheskysurveyedisobservedthrougha affect thenumberofsourcesdetectedinMSS/EMSS that thenonuniformityofhydrogencolumndensitywhich shown (MaccacaroandGioia1986;Maccacaroetal.1988) to theinterstellarmediumwithinGalaxy.Ithasbeen the EinsteinIPC,aresensitivetophotoelectricabsorptiondue is detectedoff-axis. net counts,andbecomesincreasinglylargerwhenthesource base (P.Giommi1989,privatecommunication;see§IIItf), uncertainty isabout10"forsourceson-axiswithatleast30 detected bythechannelmultiplierarray(CMA;deKörte more accuratepositionsarealsoavailablefor42IPCsources location andangularresolutionofthese36IPCsources. étal. 1981)onboardEXOSAT.CMApositionsanderrors on IPCdata.Fromacross-correlationwiththeEXOSATdata level). UseoftheHRIdatahasbeenlimitedtoimproving are reportedincolumn(12)ofTable3.TheCMApositional H Source selectionandfluxmeasurementswerebasedentirely Fig. 4.—Histogramofthehydrogen columndensityvaluesforthe X-ray detectorsworkingatrelativelysoftenergies,suchas c) PossibleSelectionEffects Vol. 72 19 90ApJS. . .72. .5 67G -3 l l l pected tofallrandomlyintheareasurveyed.Forinstance, the No. 3,1990 counted forbycomputingthenumberofsuchsources ex- chosen astargetsoftheobservations.Thisbiascanbe ac- degree (Abell1958),andthusonly2.5clustersshould be density ofAbellclusterswithZ><3is3.7X10persquare of previouslyknownandstrongX-rayemitters,whichwere distance classification5or6, twohavedistanceclassification found serendipitouslyinthe survey.Fourteenofthemhave clusters; seeAbell,Corwin, andOlowin1989)havebeen In total,17Abellclusters(14 northernandthreesouthern added tothesurveycompensate fortheirexclusionapriori. ies, andBLLacobjects.ItwaspointedoutbyOort,Arp, in thecatalog.One-fourthofIPCimagesusedfor were evaluatedonebyastothelikelihoodofassociation itself) havebeenreportedpreviouslyandareconsistentwith with aQSOatthesameredshiftastargetquasar, with thetargetsource,andconsequentlyexcludedorretained influenced inanywaybythenatureoftarget At scalesuptotwicethislattercorrelationlength,wefind in is considered,thecorrelationfunctionunityat20h~Mpc. lations ataseparationr<25h~Mpc(h~=100/H)for known. BahcallandSoneira(1983)reportstrongspatialcorre- radio sources(119).Inthesamewayasforquasars,wehave in fieldspointedatquasars.Sofarwehavenotfoundquasars confidence thatthisselectioneffect,ifpresent,isnotcommon, (z <1.5).Wehavecheckedthenatureofserendipitoussources references therein).lovinoandShaver(1988)Shanks, de Ruiter(1981)thatquasar-likeobjectsmaybeassociatedin observation. Toascertaintheserendipityofsources,each clusters ofgalaxieswithoutbrightextendedX-rayemission Hale-Sutton, andBoyle(1988)reportclusteringoncomoving quasars hasbecomemuchstronger(seeShaver1988and vatory. Morerecentlytheevidenceforphysicalclusteringof More thanone-thirdofthetargetsarequasars,activegalax- tous Galacticsourcesinfieldspointedatextragalacticobjects. affected byanyselectioneffect.Thesameappliestoserendipi- survey werepointedatGalacticobjects;thustheextragalactic IPC imagehasbeenmanuallyinspected.Thesourcesfound Cleary, Heiles,andHaslam(1979). complete sampleof104rich(R>1)Abellclusterswithdis- checked forthedetectionofserendipitousclustersgalaxies (241), normalandabnormalgalaxies(142),extragalactic ages withextragalactictargetsarecenteredongroupsand superclustering (Stockeetal.1983).TheremainingIPCim- associated withthetargetofIPCobservation. the EMSSsampleonlyoneclusterwhichislikelyto be sample of1547clusters,includingD=5and6 than 100,000clustersrandomlydistributed.Whenalarger tance classD<4comparedwithaconstructedsetofmore at thesamedistanceastargetclusterwhenredshiftsare serendipitous quasars(i.e.,twowithintheEMSS and thusitdoesnotintroduceanyappreciablebias.Pairsof at thesameredshiftastargetquasar.Thisgivesus scales <10h~Mpcoccurringpredominantlyatlowredshifts serendipitous X-raysourcediscoveredbytheEinsteinObser- superclusters. Margon,Chanan,andDownes(1981)identified serendipitous sourcesfoundinthesefieldsshouldnotbe surveys ofStarketal.(1989),HeilesandCleary(1979), 0 A completenessbiasisintroducedbytheexclusionapriori We donotexpectthenatureofserendipitoussourcestobe © American Astronomical Society • Provided by theNASA Astrophysics Data System EINSTEIN EXTENDEDMEDIUM-SENSITIVITYSURVEY 12 Astronomical DataCenterthroughSIMBAD(SetofIdenti- literature touseavailablespectroscopicdataobtained by used toidentifythesources in theMSS(Stockeetal.1983), reasons ofhomogeneity,IPCimagesusedbyotherobservers, nearby andrichclusterofgalaxies,bluestellarobject).An been obtainedonthesamescaleasfindingcharts.Inspec- prints (bothEandOcolors)ortheEuropeanSouthern objects. Data) andobtainedmeasurementspropertiesofspecific others. WehavealsoaccessedthedatabankofStrasbourg done priortospectroscopyreducetheamountofoptical fications, Measurements,andBibhographyforAstronomical and havedetectedsourceswhichhadalreadybeendiscovered the 835sourceerrorboxes.Sincewehavereanalyzed, for telescope timerequiredtoobserveeverysingleobjectinside finding chartscenteredatthepositionsofall835X-ray tion procedurefollowedisverysimilartothatdescribedin is thetargetofIPCsequence6712andserendipitousin pointed atastar;theradioquasar3C204istargetofIPC and identified,wehaveperformedanextensivesearchof the suitable forpublicationisinpreparation. atlas ofthefindingchartsfor835sourcesquality assessment ofthenatureX-raysource(e.g.,brightstar, superposed onthesameregionofskypermitsapreliminary tion oftheopticalfindingchartsandisointensitycontours Observatory plates.IsointensityX-raycontourmapshave sources havebeenproducedusingthePalomarSkySurvey spectroscopically allthesourcesinEMSS.Theidentifica- 0014+15. IPC sequence3457andisaserendipitoussourcein Abell 2092isthetargetofIPCsequence135butwas Stocke etal.(1983)andGioia(1984).Enlarged(6X) sequence 6834,centeredonanotherdistantclusterknownas cluster knownas0016+16,discoveredbyR.Kron(seeKoo 6964, whichiscenteredonastar;theSeyfertgalaxyMrk766 which appearinTable5(SupplementarySouthernClusters) X-ray 90%confidenceerror circle toassessanidentification. we nolongerrequirespectra ofallopticalobjectswithinthe 1981), ataredshiftof0.541(Spinrad1980),isthetarget sequence 2715centeredonthequasarON325;distant fields centeredonunrelatedobjects.Afewexamplesfollow. the survey,sincetheyhavebeendetectedserendipitouslyin of Abell,Corwin,andOlowin(1989).TheseareS400(R= richness class1,threeto2,andoneeach sequence 501andaserendipitoussourceinIPC serendipitously discoveredinIPCsequence7642,whichwas are targetsinotherIPCimages.Thesesourcespresent sources whichhavebeenmissedisnegligible. sky, thenumberofbright(afewtimes10“ergscm“s“) richness classes3and4.Wehavealsofoundthreeclusters 4, andonehas3.Fivebelongtorichnessclass0,seven Since theEMSScoversonly2.9%ofhighGalacticlatitude 1,D =6),S1101(R0,Z)4),andSllll0,D4). Based upontheexhaustiveoptical identificationprocedure As withtheMSSsample,wehaveundertakentoidentify Preliminary workofclassificationandidentificationwas Some oftheserendipitoussourcesdiscoveredbyEMSS III. PROCEDUREOFIDENTIFICATIONANDCLASSIFICATION 573 19 90ApJS. . .72. .5 67G 574 one tofiveobjectswithintheerrorcirclearetakenestablish lution andawavelengthcoverage,atgoodsignal-to-noise bility ofafewmisidentifications,especiallyforobjectswith counterpart isthencheckedusingthef/method(de- finding chartsandradiodetectionswhereavailable,spectraof Rather, guidedbycolorsandmorphologyfromtheskysurvey ratio, of3400-6400Á.Thesespectrawereobtainedprimarily very unusualcolorsorf/values.Webelieve,however,that scribed in§III6below,anddetailMaccacaroetal with theTIandGEC,respectively.Additionalspectrafor or GEC385X575CCDs.Thewavelengthcoverageis4000A Du PontTelescopeonLasCampanasinChile.Wehaveused at theMultipleMirrorTelescopeinArizonaor2.4m the correctidentification.Thereasonablenessofproposed University ofHawaiionMaunaKeawitheitherTI800X the Hawaiigrismspectrographat2.2mtelescopeof 1988). Thislessthoroughproceduremayintroducethepossi- La Silla,Chile(incollaborationwithD.Maccagniand to approximately8500A,andtheresolutionis35A50 X-ray-selected quasars(Æ-F)=0.5(Gioiaetal.1984),the G. Vettolani). 1.5 mtelescopesoftheEuropeanSouthernObservatoryon Steward ObservatoryonKittPeak,andatthe3.6m this programwereobtainedatthe2.3mtelescopeof such casesarerare. pubhcation oftheopticalidentifications,forwhichtwoor have resultedinthecorrectidentificationofX-raysource particularly withthefainterstellarcandidates(F=13-16). ber of“field”stars,thelatte.:beingastrongfunction X-ray errorcircleisverysmall(0.02),smallerthanthenum- number ofF<20.5quasarsexpectedtofallbychanceinone rapid rotationandbinarism. epoch 0.1Aresolutionechellespectraat5200tosearchfor degree (seeBoyle,Shanks,andPeterson1988).Adoptingfor few sourceswillnotbecompletelyunderstooduntilhigher candidate couldbeanX-rayemitterinthesecases,and more counterpartstotheX-raysourcearepossible.Each for anoverwhelmingmajorityoftheEMSSsources.Still, spectra ofmostthesestarsand,inmanycases,multiple Fleming (1988)hasobtainedblue1Aresolutionclassification Galactic latitude.Therefore,additionalcaremustbetaken have anopticalidentification. ROSAT PSPCorHRI).Weemphasizethatthenumber of there areafewcasesreportedherein,andinourforthcoming drawn fromtheanalysisofthissample. angular resolutionX-rayobservationsareobtained(e.g., dences withoptical,radio,X-ray, infraredobjectsfromover spectroscopically identified.Atpresent91%ofthesources fication codebasedonthef/methodtosourcesnot yet sources whichhavespectroscopicdata,andweassignaclassi- and willnotaffectthestatisticalconclusionswhichcan be these sourceswithanambiguousidentificationisverysmall xv xv 50 catalogswhicharedisk-resident ontheEinsteincomputer o xv The majorityoftheclassificationspectrahave7-8Areso- We areconfidentthattheseratherexhaustiveprocedures The totalnumberofB<2\QSOsisabout35persquare We haveexaminedtheIPC source errorcirclesforcoinci- In thispaperwepresentidentificationsonlyforthose a) CrossCorrelationwithOther Catalogs © American Astronomical Society • Provided by theNASA Astrophysics Data System GIOIA ETAL. -21 bidge QuasarCatalog,andZwickyCatalog).Mostofthe identifications withSAOstars,NGCgalaxies,andAbell have beenfoundincommontothetwosurveys.Inanumber base hasbeencross-correlatedwiththeEXOSATdatabase. (among themSAOCatalog,OhioMasterCatalogofRadio required toidentifytheX-raysource.Atotalof42sources cantly thenumberofopticalcandidatespresentinerror ments, IPCandCMA,operatingatdifferentenergybands, The detectionofthesamesourcebytwodifferentinstru- clusters haveresultedfromthisprocess. circle and,consequently,theamountofopticalobservingtime emitter (e.g.,Gioiaetal.1986).Inaddition,theCMAposi- can provideadditionalinformationonthenatureofX-ray Sources, AbellCatalog,IndexMCGBur- being carriedoutforthe extragalactic populationofthe between theIRASsourcesandX-raysources.Twenty-six of casestheCMAdetectionbecameavailableafteridenti- tional uncertainty(-10"forsourceson-axis)reducessignifi- clusters ofgalaxies,andone“normal”galaxy. CMA positionconfirmedtheproposedidentification.These fication oftheIPCsourcewasmade.Inallthesecases camera onthe61cmtelescope oftheWhippleObservatoryis ies. BoththeEXOSATandIRAScoincidencesarere- Point SourceCatalog(1985).Wehavefound39coincidences are dividedinto18stars,15AGNs,fiveBLLacobjects,two obtained foractivegalacticnuclei withstandardexposuresof survey northofdeclination —20°. Threecolors(B,V,R)are log f+m/2.5531,whereistheX-rayfluxinergs ported inTable3(col.[12]). was computedusingspectroscopicdatawhichconfirmedthe are stars,nineAGNs,andfournormalnearbygalax- bands andresponsesofthetwoX-raytelescopes. present thenomographusedforthisevaluationprocess. The have classifiedtheunidentifiedsourcesasclass1or 2 ratio isareliablemethodfortheseparationofGalacticand cm sinthe0.3-3.5keVband)].Theuseoff/ MSS allowedustooptimizethesearchforcorrectidenti- fainter objects.Magnitudes and colorshaveuncertaintiesof nomograph shouldbemodifiedforusewiththeROSAT magnitude oftheopticalcounterpart,asestimatedfrom The majoradvantageofthemethodisthatonlyvisual (1984) quoteanaposteriorisuccessrateof96%.Thisvalue extragalactic sourcespriortothespectroscopy.Gioiaetal. 10 minutesineachfilter.Longer exposuresaretakenfor fication usingthef/ratioforeachsource[log(/*//„)= extragalactic oraGalacticobject.Maccacaroetal.(1988) give POSS prints,andtheX-rayfluxofsourceareneeded.We sources originallyclassifiedonthebasisoff/ratio. all-sky surveydata,totakeintoaccountthedifferentenergy a verydetaileddescriptionoftheclassificationprocess and according totheirlikelihoodofbeingassociatedwith an xv xv xv xv Through acollaborationwithP.Giommi,theEMSSdata A cross-correlationhasalsobeenperformedwiththeIRAS A parallelprogramofphotometrywiththeCfACCD The experiencegainedinidentifyingthe112sourcesof b) RatioofX-RaytoVisualFlux c) CCDPhotometry Vol. 72 19 90ApJS. . .72. .5 67G 3 with the171radiodetectionsfound.Therefore,asource by chanceinthe616errorcircles.Thisshouldbecompared AGNs areradioemittersattheselowfluxlevels brings to616thetotalnumberofsourcesforwhichradio the observedandderived parameters foreachsourceas within theX-rayerrorcirclehasasmall(-9%)but not negligible probabilityofbeingunrelatedtotheX-raysource. (Bennett etal.1983),weexpectapproximately15radiosources results, usingradio-opticalluminosityfunctions,willbeper- ( >1mJy).Thedetectionpercentageis50%forclustersof observations exist.Wearestillintheprocessofanalyzing ray-selected sources.This,combinedwiththeradiodata date identificationswhichwereverifiedlaterbyopticalspec- in about5minutesofintegration.Thepresenceradio program tolookforpossiblemagnitudechangesintheX- formed later.Baseduponthesourcecountsat5GHz BL Lacobjects.Thesepercentagesareonlyindicative,given galaxies andisolatedgalaxies,respectively,100%forthe radio data.Weestimatethatabout20%oftheX-ray-selected already availableintheliteratureforotherEMSSsources, the radioobservations,andinseveralcasesprovidedcandi- Radio positionsvalidatedmanyidentificationsmadepriorto cation ofthecorrectopticalcounterpartstoIPCX-raysources. of theCarrayat6cmisanefficientmethodforidentifi- emission combinedwiththesmallpositionaluncertainty(1") identification. Asensitivityofabout0.2mJy(1a)isobtained will bepublishedelsewhere. (Stocke etal.1987)isinprogress.About73%oftheEMSS ray-selected BLLacobjectsvisiblefromthenorthernhemi- served anddetected.Amoreappropriateanalysisofthe obtained withtheMSSsources)andathavingamoresecure Maccacaro, andZamorani1982foradiscussionoftheresults extragalactic objects(seeGioiaetal1983andFeigelson, (snapshot mode).Theobservationsareaimedbothatinvesti- observed at6cmwiththeNationalRadioAstronomyOb- gating therelationshipbetweenradioandX-rayemissionin servatory (NRAO)VeryLargeArrayintheC-configuration such (seeTable3),northofdeclination-45°havebeen served, andphotometricmagnitudescolorsforeachsource sources northofdeclination—20°havealreadybeenob- utes) aretakenforclustersofgalaxies.Forthenearer the smallnumbersinvolvedinsomeclassesofobjectsob- troscopy. Radiomapshavebeenproducedfor554X- sphere andinthequasarsnearforegroundbrightgalaxies several adjacentCCDframesareobtained.Amonitoring about 0.05mag.Deepredframes(exposuresof20-60min- ated Universities,Inc.,undercontract withtheNationalScienceFounda- No. 3,1990 tion. 3 The EMSSsourcesarepresentedinTable3.Columnslist Almost alltheextragalacticsources,orthoseclassifiedas TheNationalRadioAstronomy Observatory isoperatedbyAssoci- a) TheEMSSCatalogofX-RaySources © American Astronomical Society • Provided by theNASA Astrophysics Data System IV. THECATALOG d) VIAData EINSTEIN EXTENDEDMEDIUM-SENSITIVITYSURVEY -2_1 line) anddeclination(ddmmss.s,secondofthecentroid with thepositioninarcseconds(90%confidenceerrorcircle follows: radius). Apositionaluncertaintyof4"indicatessourcesde- of theX-raysource(1950.0coordinates). cated fractionofminutes,anddeclinationindegrees MS followedbyrightascensioninhours,minutes,andtrun- arcminutes. we havemultipliedthecorrectedcountrategivenincolumn previous work(notethattheREVIprocessingcomputesitin observed countsinthedetectioncell;fluxhasbeen cm s,and1aerror(secondline)fromphoton-counting source comefromtheHRI. tected alsobytheHRI.Inthesecasescoordinatesof computed inthe0.3-3.5keVbandforconsistencywith statistics only,computedasthesquarerootoftotal with adifferentconversionfactorappropriatefor (5) byaconversionfactorappropriateforpower-lawspec- with themoderateangularresolutionofIPC.Theyare adopted: fortheAGNs,BLLacobjectsandclass1 the 0.2-3.5keVband).Thefollowingassumptionshavebeen point-spread functionbecomessignificantlydegraded,sothat mainly clustersofgalaxiesbutalsothreegalaxies,eightAGNs, cacaro etal.(1988).Anumberofsourcesareresolvedeven energy distributionoftheEMSSsourcesperformedbyMac- Raymond-Smith thermalspectrum(RaymondandSmith IPC pointing.Forunresolvedgalaxiesandclustersof Galactic hydrogencolumndensityinthedirectionofeach trum withanenergyindexa=1.0andthemeasured be regardedastentative.Inthecaseofclustersgalaxies the include oneswhichareidentifiedasAGNsandBL Lac be trusted.Wehavenotedsuchsourcesinthe“Comments” not be.Observationswithahigherresolutioninstrument(e.g., 1977) withatemperatureofabout6keV.Theaboveassump- physical size(e.g.,1Mpc).Suchaprocedurecannot be column ofTable3aspossiblyextended.Sincethesesources IPC point-spreadfunction.Thisdistortionofthe extension istrueoranartifactofthedegradation some sourcesappeartobeextendedeventhoughtheymight and threeBLLacobjects.AttheedgeofIPCdetector tions arejustifiedbytheresultsofanalysisX-ray the fluxhasbeencomputedusinganidenticalprocedurebut objects aswellclusters,theindicationofextensionshould function cannotbemodeledeasily,soindicationsthatsources the HRIonROSAT)areneededtodecidewhether They arefistedinthesecond fine ofcolumn(9).Inthesecases ing totheproceduredescribed under“Column(9)”below. nearby ones,giventheirproximitytotheribs(oredges)of the flux estimateshouldbeevaluatedinaregionofconstant are extendedwhentheyneartheIPCedgecannotalways only thevignettingandmirror scatteringcorrectionshave column, wehaveusedtheextended countsmeasuredaccord- or galaxies,andmarkedwith anasterisknexttotheflux For alltheresolvedsourcesidentifiedwithclustersofgalaxies detector or,insomecases,tothetargetofobservation. applied totheserendipitousEMSSclusters,especially the 13 Column (1).—Sourcename.EMSSsourcesaredenotedby Column (3).—Positionaluncertainty:theerrorassociated Column (2).—Position:rightascension(hhmmss.s,first Column (4).—X-rayflux(firstline)inunitsof10“ergs 575 19 90ApJS. . .72. .5 67G MS0037.7-0156 MS0037.2-0228 MS0036.5+2103 MS0036.1+3309 MS0031.9-0646 MS0026.4+0725 MS0020.4+0058 MS0007.1-0231 MS0004.0+2844 MS0003.3-4201 MS0002.8+1556 MS0017.3+1540 MS0015.9+1609 MS0006.8-2228 MS0002.8+1602 MS0002.4+1604 MS0007.4+1051 MS0007.2-3532 MS0002.5-4205 MS0013.4+1558 MS0012.5-0024 MS0011.7+0837 MS0011.6+0840 MS0009.9+1417 MS0007.8-3543 Source Name (1) American Astronomical Society •Provided bythe NASA Astrophysics Data System -015651.0 -022834.3 +210326.4 R.A.(1950) +330913.7 Dec. (1950) -420145.6 +160254.5 +072529.4 +284437.3 +155642.1 -420510.8 +160407.0 +005858.8 -023108.7 -222842.6 +154041.8 +160956.5 -354320.5 +105148.8 +155839.3 -002423.1 +084057.5 +141716.9 +083730.5 -064646.0 -353237.3 003746.3 003715.0 003630.5 003606.9 003154.0 002628.9 000706.3 000653.1 000402.5 000319.6 000252.0 000251.1 000233.1 000227.4 002029.3 001719.9 001558.1 000727.4 000715.2 001327.2 001234.7 001146.7 001137.5 000954.0 000748.1 (2) 49 49 53 53 Err 48 52 53 52 49 46 46 52 46 49 49 49 53 54 46 46 48 48 49 49 (3) 20.16* 37.54 11.00 27.61 10.67* 13.11 Catalog ofEMSSX-RaySourcesandAssociatedParameters 2.04 0.38 3.90 0.68 2.44 0.58 5.90 1.44 1.18 5.32 2.32 2.17 1.21 2.85 3.29 3.29 0.50 0.69 0.68 8.14 0.51 0.76 4.54 1.57 1.36 0.89 7.98 2.41 5.09 3.83 3.64 8.86 4.48 1.05 9.56 6.11 6.54 1.35 0.73 0.86 1.09 0.50 0.98 1.82 Err Fx (4) 187.71 11.4 138.05 15.15 29.52 55.02 18.06 23.12 27.42 26.94 35.38 40.71 25.46 14.23 4.2 16.45 68.81 16.27 36.01 7.9 44.31 18.38 41.15 17.89 7.92 5.4 9.07 4.2 9.07 9.34 (5) S/N 10.3 (6) 5.7 4.1 5.2 9.3 4.4 4.6 9.3 4.5 5.2 5.0 6.5 6.0 9.5 7.2 4.1 9.1 9.0 4.8 7.2 Net C 131.7 108.9 118.2 TABLE 3 49.0 25.0 47.9 23.4 Err 19.8 29.7 53.1 24.2 24.0 31.8 22.6 11.6 10.7 46.0 92.8 98.1 11.3 10.3 93.7 32.2 54.2 10.8 33.1 56.6 31.0 11.4 10.0 79.3 96.8 (7) 8.8 8.4 576 6.0 4.8 5.3 5.7 5.3 9.9 5.7 8.2 5.6 7.6 6.9 7.5 7.9 6.3 6.9 6.1 Bkg C Time 10109 10109 28.0 22.1 9483 3895 11.0 9483 2057 5166 5166 2991 5166 16.1 20.4 4014 1553 1284 14.0 1284 12.0 1970 5565 3050 13.3 21.7 6250 15.0 8669 5859 2091 4233 2091 3050 12.8 19.2 1848 14.9 (8) 3.2 2.3 3.3 4.0 6.2 4.4 8.8 8.4 2.8 5.4 4.8 9.1 Ext C Seq n. 10125 5.9E+20 5393 2.9E+20 5393 2.9E+20 7957 3.4E+20 5360 5360 2225 4.8E+20 5360 3.9E+20 4247 1.7E+20 4247 6005 5.8E+20 9112 3.7E+20 8452 2.8E+20 4518 1.2E+20 9062 3.5E+20 6727 2.2E+20 6839 4.0E+20 5428 7429 7429 4518 6834 8453 2.9E+20 6834 (9) 271 505 235 3.9E+20 3.9E+20 1.7E+20 4.1E+20 4.1E+20 4.3E+20 1.2E+20 4.1E+20 6.2E+20 6.2E+20 (10) NH AGN AGN AGN AGN AGN AGN STAR STAR STAR STAR CL AGN STAR STAR AGN AGN Source AGN STAR CL STAR STAR 13 25 (ID 3 2 2 2 1 1 1 1 1 Id 1 1 1 2 1 1 1 1 MSS2 MSS2 SAO 128830 SAO 73743,IRAS SAO 214961 SAO 91699 MSS2 SAO91750, EXO,var. SAO 91772 000728.6+105158 (8") Comments (12) 19 90ApJS. . .72. .5 67G MS0111.2-3836 MS0109.4+0242 MS0111.9-0132 MS0109.4+3910 MS0112.9-0148 MS0108.4+3859 MS0108.4+3836 MS0108.0+0139 MS0105.2+3144 MS0104.2+3153 MS0103.5+3206 MS0102.3+3255 MS0049.9+0035 MS0100.6+0205 MS0055.5+0014 MS0053.3-1035 MS0052.1+2931 MS0048.8+2907 MS0043.3-2531 MS0039.2-0206 MS0039.0-0145 MS0038.8-0159 MS0038.7+3251 MS0038.0+3242 MS0037.8+2917 Source Name (1) R.A.(1950) -014828.3 Dec.(1950) +391041.6 -383645.0 +024202.4 +385912.3 -015943.5 +324200.3 +291707.6 +325117.6 +383629.4 -253142.5 -020610.4 American Astronomical Society •Provided bythe NASA Astrophysics Data System +003557.3 +290751.0 +013940.2 +293128.6 -013233.5 +314453.6 +315325.7 -103513.4 +325533.8 +001458.9 +320646.7 +020527.3 -014530.2 011259.2 010925.9 010924.1 011154.5 011114.0 003844.6 003800.5 010828.4 003853.8 003750.7 010827.5 004321.8 003913.0 003905.5 010800.4 004853.0 004959.8 010515.9 010414.5 005318.4 005207.9 010335.4 010219.6 010040.7 005534.5 (2) 57 10.93 53 Err Fx 49 46 52 48 49 46 48 46 69.98* 48 52 52 54 49 49 49 53 49 45 63.04 46 48 49 49 (3) (4) 2.02 0.28 0.47 4.95 0.78 3.76 1.58 5.39* 1.15 2.02 0.48 4.31 2.98 3.12 0.43 5.64 2.30 3.07 0.37 7.07 3.19 0.42 1.28 0.56 2.55 0.43 0.41 0.69 2.80 0.34 1.48 4.35 0.34 5.33 3.21 0.83 8.75 3.33 0.48 0.51 1.60 0.78 0.78 0.67 7.32 1.96 1.02 Err 228.24 201.97 22.5 54.66 5.4 17.29 14.33 17.15 13.82 21.78 11.93 10.01 15.94 28.17 10.6 14.09 23.46 10.26 20.81 12.17 12.14 5.53 9.55 5.74 8.95 6.48 8.00 6.67 (5) 10.6 S/N (6) TABLE 3—Continued 5.6 4.8 4.7 5.4 9.0 5.3 6.9 4.4 5.7 5.0 7.3 7.6 4.3 9.9 4.7 5.0 4.1 6.3 7.2 4.1 6.8 137.2 Net C 106.8 522.0 106.0 137.3 53.6 32.2 13.0 31.3 37.3 Err 11.9 23.4 47.7 65.6 51.6 36.0 34.0 43.0 77.1 10.7 43.2 27.6 23.2 10.5 10.4 79.8 31.8 24.6 56.2 13.0 33.6 63.5 (7) 577 5.9 9.5 7.9 6.5 5.3 8.1 8.9 9.6 7.9 7.5 7.2 8.2 7.0 5.7 8.8 8.3 6.8 6.7 13968 13968 Bkg C 11541 11541 Time 11541 11479 11479 11700 37.4 31.8 1893 5853 24.7 10.7 34.2 26.0 29.2 2837 29.0 22.2 33.9 31.3 4321 13.7 7763 9483 15.4 31.7 3099 15.4 9483 6252 6252 5019 18.4 15.0 6858 9483 17.1 14.5 6567 6252 12.8 6877 11.4 6858 (8) 2.8 8.0 4.6 8.6 Ext C Seq n. 5394 4.3E+20 5394 2663 8458 3.1E+20 8464 8464 5.8E+20 5393 8464 5.8E+20 2011 2082 5393 5393 5123 7917 6828 5.8E+20 6828 5.8E+20 5123 2086 8454 6308 6308 6308 1759 8456 8992 (9) 108 398 4.3E+20 1.8E+20 5.8E+20 2.9E+20 2.9E+20 2.9E+20 2.9E+20 5.0E+20 CL 5.6E+20 5.6E+20 5.8E+20 1.3E+20 5.8E+20 5.6E+20 5.4E+20 2.8E+20 3.2E+20 4.7E+20 3.7E+20 (10) NH AGN AGN AGN STAR CL AGN AGN AGN AGN AGN AGN AGN AGN AGN AGN Source STAR AGN AGN AGN CL AGN AGN STAR (ID 8 1 9 1 7 3 3 1 3 2 1 Id 1 2 1 1 1 6 5 1 1 1 MSS1 MSS1 MSS2 MSS2 All MSS2 U 524,IRAS 4C02.04, MSS2 SAO 54445,IRAS,EXO HRI 10566 010515.2+314446(15") Comments (12) 19 90ApJS. . .72. .5 67G MS0114.3-0123 MS0114.5+0809 MS0114.5-0140 Source Name MS0115.2+0812 MS0136.0-5614 MS0135.4+0256 MS0135.3+0324 MS0116.3-0115 MS0116.6+3147 MS0136.3+0606 MS0136.3-2505 MS0135.0+0339 MS0134.4+2027 MS0116.7+0802 MS0134.4+2043 MS0117.2-2837 MS0132.5-4151 MS0132.5+2101 MS0120.0+0328 MS0131.1+0342 MS0130.0+0330 MS0129.1-2237 MS0124.2+3407 MS0122.9+0129 MS0122.1+0903 (1) R.A.(1950) American Astronomical Society •Provided bythe NASA Astrophysics Data System Dec.(1950) -012344.1 +080953.9 +081210.5 -011504.6 -250545.0 -561429.3 +314702.2 +060626.4 +025617.1 +032441.9 +033923.1 +202711.2 +080249.5 +204340.4 -415122.8 -283700.6 +210103.4 +032827.3 +034217.8 +033024.3 -223745.6 +012945.2 -014025.3 +340725.5 +090324.7 011419.9 011430.7 011434.6 011513.2 011621.1 011636.3 011645.5 013620.2 013600.2 013528.3 013522.8 013621.0 013501.4 013425.3 013424.9 013233.3 011713.9 013231.2 013107.3 012001.5 013001.7 012909.5 012414.2 012257.1 012206.6 (2) Err 54 49 56 62 48 54 55 49 49 45 49 49 51 49 45 54 53 54 48 50 50 56 52 (3) 46 49 22.22 14.31* 20.65 11.60 36.20* 2.77 2.71 0.66 0.46 0.41 1.81 0.25 1.04 2.72 2.35 0.65 1.81 0.50 0.90 4.84 1.98 4.41 0.34 1.69 0.44 0.55 1.81 0.27 0.24 1.08 9.85 1.12 1.19 0.28 3.29 5.70 5.32 4.49 1.09 6.52 1.36 7.42 0.75 8.42 0.85 7.42 1.02 1.24 1.04 1.04 Err Fx (4) 127.75 37.14 48.61 23.64 86.00 11.2 49.23 17.9 29.37 5.5 16.83 28.62 28.20 26.62 24.85 16.98 92.54 19.0 12.71 ccr 9.86 9.43 3.64 6.33 8.97 3.60 3.77 6.45 9.90 (5) 6.79 TABLE 3—Continued S/N (6) 5.9 4.2 4.4 5.4 4.1 5.4 5.3 7.9 4.9 4.5 6.8 4.1 5.5 6.4 4.9 5.1 4.4 4.4 4.3 8.7 6.0 Net C 343.1 377.1 131.9 Err 25.6 53.8 34.0 30.7 77.5 39.2 38.2 38.3 39.2 45.1 11.8 42.0 30.8 27.1 60.2 19.1 32.5 38.1 25.7 20.0 19.8 (7) 41.6 34.2 33.0 87.2 10.0 6.1 7.7 9.1 578 7.5 7.1 9.7 7.2 8.9 7.7 7.9 8.8 6.8 7.5 7.7 5.8 6.2 4.7 6.1 6.9 6.2 6.3 Bkg C Time 16208 13968 16208 16208 13010 13010 13010 28.2 25.0 11.4 6858 26.3 21.7 20.3 1781 17.5 6858 3663 22.9 26.2 37.8 4049 18.8 8869 8869 8869 21.9 7987 (8) 5755 15.9 12.8 6389 3101 3101 2652 4512 1697 3653 13.8 1050 4.9 7.9 8.1 5.3 2.0 8.3 4.8 7.1 9.9 6.4 Ext C Seq n. 8459 5394 8459 7160 5.8E+20 3996 1.2E+20 4935 2.9E+20 5419 5.8E+20 5157 1.7E+20 5419 5.8E+20Class1 5257 1.7E+20 2089 4.9E+20 2088 3.2E+20 4250 3.7E+20 5419 5.8E+20 (9) 4249 4249 4199 5.1E+20 270 270 4.3E+20Class1 250 270 4.3E+20 513 3.1E+20 513 3.1E+20 513 3.1E+20 424 153 86 56 4.0E+20 4.3E+20 4.3E+20 4.0E+20 3.0E+20 3.0E+20 3.2E+20 1.1E+20 (10) NH AGN AGN AGN Source GAL AGN AGN AGN AGN AGN AGN AGN AGN AGN AGN AGN STAR AGN AGN AGN GAL STAR STAR (ID Id 1 1 1 3 7 2 1 8 1 1 1 2 1 1 1 8 1 1 1 1 1 1 MSS2, Maccagniet MCG-05-04-16 EXO MSS1 al. 1987 PHL 1033,Hewitt NGC 533 MSSl SAO 74827,EXO 011714.5-283707(40») 013424.4+202653(15") and Burbidge,1987 SAO 54705,IRAS Comments (12) 19 90ApJS. . .72. .5 67G MS0207.4-1016 MS0206.0+0219 MS0206.2-1019 MS0205.7+3509 MS0200.9-0858 MS0200.5-0857 MS0136.8+3307 Source Name MS0214.9+1813 MS0212.0+1741 MS0205.5+1454 MS0204.8+0217 MS0204.1+1503 MS0159.1+0330 MS0149.5-3929 MS0144.2-0055 MS0140.3-3055 MS0140.3-3042 MS0158.5+0019 MS0151.0-3919 MS0150.6-1040 MS0148.4-3938 MS0139.3+0557 MS0138.0-5627 MS0152.4+0424 MS0147.8-3941 (1) R.A.(1950) Dec. (1950) +330708.5 -562742.5 +055731.6 +350910.2 +145441.2 -005533.0 -305508.6 American Astronomical Society •Provided bythe NASA Astrophysics Data System +021903.3 +021730.0 -085808.0 +150324.7 +033031.1 -392932.3 -393859.6 -394151.4 -101659.2 +001957.8 +042413.0 -391932.8 -104011.4 +181308.7 +174115.1 -304239.4 -101918.4 -085706.8 013651.8 013800.1 013923.0 014019.1 020615.4 020601.5 020542.1 020530.1 020449.6 014412.7 014022.4 020729.5 020410.7 020057.5 021458.7 020031.9 015910.8 015832.7 014826.5 014752.4 021201.6 015227.9 015101.3 015041.9 014930.7 (2) Err 50 49 53 50 48 62 46 48 48 49 49 45 53 46 55 53 49 49 49 49 63 48 49 48 (3) 86.92 91.25 3.58 0.76 2.19 0.91 4.18 2.67 5.24 4.11 2.41 2.10 3.06 0.36 0.91 0.67 3.23 0.64 0.92 8.12 0.33 0.39 1.86 4.83 0.48 2.74 0.38 1.66 1.14 1.61 0.50 2.93 0.61 0.42 1.99 9.16 0.37 2.17 0.25 6.20 9.03* 6.16 1.01 1.53 0.48 1.45 0.33 0.33 1.66 6.28 Err Fx (4) 456.24 371.14 20.89 12.33 11.04 40.61 16.52 45.82 29.33 10.1 14.94 10.24 30.76 21.99 11.61 13.72 13.29 ccr 8.30 6.98 9.96 5.3 7.66 9.82 9.27 7.23 9.25 6.51 (5) S/N 18.9 14.1 (6) 4.7 5.0 5.7 5.0 4.6 4.6 4.8 5.5 4.5 4.8 4.2 8.8 4.3 5.0 7.3 6.1 4.1 5.7 4.5 8.9 6.2 TABLE 3—Continued Net C 360.7 201.4 114.5 103.8 Err 31.9 28.4 29.1 24.0 37.0 28.2 59.2 39.2 33.2 34.0 43.0 85.2 35.4 25.8 19.1 41.8 28.1 31.0 52.8 14.3 47.4 43.9 11.3 65.9 11.8 (7) 5.7 6.7 8.2 8.1 7.3 6.1 6.2 6.2 7.6 6.2 9.7 6.9 6.9 8.8 9.7 6.0 7.4 7.3 9.5 6.3 9.3 579 Bkg C Time 10822 10822 11875 11875 11875 11875 7036 13.1 27.8 4049 22.0 3217 3217 2277 5135 35.2 7608 4187 7608 5135 5725 25.2 8517 10.6 17.0 14.8 33.1 8517 6389 1566 13.0 16.2 3261 3506 23.1 34.2 35.7 13.5 10.2 1136 4820 11.3 (8) 8.1 2.6 8.0 3.3 2.6 8.8 9.8 7.7 Ext C Seq n. 10379 8.6E+20 10379 8.6E+20 3719 4250 4935 2.9E+20 3978 3.3E+20 5443 5163 3187 3978 3.3E+20 3714 3719 7828 2.3E+20Class1 7828 2.3E+20 5163 5335 2.0E+20 7284 5.8E+20 5179 2.1E+20 8461 4021 1.6E+20Class2 4021 4021 4021 8333 4.2E+20 (9) 480 4.4E+20 78 3.7E+20 2.1E+20 1.7E+20 2.1E+20 1.4E+20 1.7E+20 6.1E+20 3.9E+20 6.1E+20 1.6E+20 1.6E+20 1.6E+20 (10) NH AGN Source AGN AGN STAR BL AGN AGN AGN Class 1 AGN AGN STAR CL AGN AGN Class 1 CL STAR STAR STAR STAR Class 2 22 27 (ID Id 1 1 1 1 2 1 8 1 1 1 1 1 1 1 1 PHL 1106,Hewitt SAO 232490 EXO MS Si and Burbidge,1987 CV, TTARI,var.,EXO HRI 8017 A293, PKS0159+034 SAO 92873 -2.3' SE,MSS2 020528.6+145429(30») 020409.6+150325(15») Comments (12) 19 90ApJS. . .72. .5 67G MS0257.3+0733 MS0255.3+2018 MS0244.8+1928 MS0244.8-0024 MS0244.6-3020 MS0242.3-4047 MS0241.6+1045 MS0239.9+0704 MS0238.8-2314 MS0237.9+0654 MS0237.6-0805 MS0236.4-0148 MS0235.6+1631 MS0234.8+0655 MS0234.7-0210 MS0234.4+0641 MS0234.2-0321 MS0234.1+1620 MS0233.7+0649 MS0232.8-0400 MS0232.5-0414 MS0232.4+2321 MS0226.8-1041 MS0225.5+3121 MS0225.5-1052 Source Name (1) © American Astronomical Society • Provided by theNASA Astrophysics Data System +073303.8 +201822.0 +192845.3 -002457.4 -302001.8 -404750.4 +104504.7 +070451.3 -231451.3 -080535.5 +065426.6 -014809.6 +163127.7 +065504.2 -021039.4 +064156.6 R.A.(1950) -032149.4 Dec. (1950) +162047.1 +064950.7 -040007.2 -041452.0 +312105.8 +232140.6 -104108.8 -105212.5 025721.2 025518.5 024451.9 024451.3 024441.5 024222.7 024140.2 023955.7 023852.9 023755.8 023740.2 023625.5 023537.2 023453.1 023445.5 023426.8 023412.2 023410.9 023345.8 023248.3 023235.6 022653.2 022533.4 023229.8 022533.8 (2) 49 49 49 20.01 52 48 11.60 49 48 17.76 49 52 51 49 49 49 49 Err Fx 46 55 49 49 49 49 53 52 49 49 46 14.11 (3) (4) 0.49 3.01 2.83 0.47 3.85 2.68 1.68 2.19 0.51 0.20 2.96 0.88 0.49 0.56 2.70 0.67 3.29 3.56 0.54 2.52 0.54 2.85 0.21 0.70 1.16 0.52 4.41 3.81 0.37 0.87 1.79 0.57 3.86 5.07 2.53 0.33 1.81 0.73 1.12 7.19 7.19 0.44 0.37 1.56 1.41 1.93 Err 15.03 56.23 5.2 14.17 58.00 11.61 88.82 14.81 11.05 13.85 12.61 22.05 19.06 20.59 10.96 29.19 35.94 10.26 42.54 3.96 5.78 9.84 8.71 4.1 8.94 ccr 9.05 6.32 (5) S/N (6) 6.2 6.0 5.3 6.9 4.5 8.1 6.1 4.8 4.9 5.5 6.6 4.7 8.4 4.9 4.4 5.5 5.1 5.8 6.8 6.9 7.3 4.2 6.4 TABLE 3—Continued Net C 47.4 44.5 31.8 48.6 40.6 44.2 44.3 33.5 68.9 31.3 59.1 31.6 24.8 46.8 26.7 Err 37.1 82.8 56.4 56.3 42.0 58.7 30.6 48.6 30.6 49.7 (7) 7.7 7.5 5.9 7.1 7.5 8.5 9.9 5.9 7.2 7.0 8.9 6.3 6.5 8.4 6.1 7.3 9.9 8.3 7.7 8.2 7.5 5.8 8.4 8.1 7.1 580 19660 10928 Bkg C 11873 Time 11873 11.6 4669 12.9 4732 1908 5315 53.8 2048 1352 15.6 5346 5216 5346 20.9 15.5 23.0 10.2 4078 7363 5807 12.2 15.2 15.7 7363 4484 12.6 7363 4484 20.4 2447 7492 17.0 10.7 4484 1385 7492 19.0 (8) 3.3 2.3 3.1 7.7 8.7 8.1 7.2 3.4 6.3 Ext C 10224 Seq n. 10223 2.5E+20 10223 2.5E+20 5698 1.1E+21 2661 9.3E+20 9691 1.1E+21 2093 9138 4033 1.7E+20 3466 2014 7510 3466 1880 4412 9285 8.9E+20 4412 7922 2.5E+20 4412 6.8E+20 7922 2.5E+20 9285 8.9E+20 7922 2.5E+20 4544 9.0E+20 6705 7.2E+20 (9) 245 -2.9E+20 3.9E+20 1.9E+20 2.4E+20 7.4E+20 2.9E+20 9.5E+20 7.4E+20 3.1E+20 6.8E+20 6.8E+20 (10) NH AGN STAR AGN STAR STAR AGN STAR STAR AGN AGN AGN STAR STAR STAR AGN STAR STAR AGN STAR AGN AGN AGN AGN Source STAR 24 10 22 11 22 22 27 10 (11) 2 2 1 1 2 1 2 1 1 1 2 1 3 Id 1 1 1 SAO 110894 024453.6+002451(25") SAO 130113,EXO SAO 110699,IRAS SAO 130032 SAO 130011 MSS 2 PKS 0232-04 Comments (12) 19 90ApJS. . .72. .5 67G MS0326.6-2008 MS0325.2-1746 MS0324.1-2012 MS0321.6-3726 MS0310.4-5543 MS0308.3+1413 MS0321.5-6657 MS0318.0-1937 MS0315.7-1955 MS0312.0+1405 MS0311.8-0801 MS0320.9-5322 MS0320.9-5355 MS0318.5-1926 MS0317.9-1949 MS0317.7-6647 MS0317.0+1834 ‘Source Name MS0307.4+1424 MS0303.8+1717 MS0302.7+1658 MS0302.5-2223 MS0302.5+1717 MS0301.7+1516 MS0257.9+3429 MS0300.1-1528 (1) © American Astronomical Society • Provided by theNASA Astrophysics Data System -200838.1 -174612.5 -201220.9 -372630.7 -665723.2 -532200.2 -535543.4 -192655.3 -193703.2 -194912.7 -664703.2 +183447.5 -195514.5 +140540.3 -080139.9 -554322.9 +141310.0 +142426.0 +171704.3 +165830.0 -222328.6 R.A.(1950) +171701.8 Dec.(1950) +151613.6 -152806.3 +342934.8 032641.4 032512.4 032408.2 032138.4 032131.9 032057.6 032056.1 031833.7 031805.6 031744.5 031754.8 031700.3 031203.1 031026.2 031547.6 031148.3 030822.2 030727.8 030352.0 030245.4 030234.5 030230.2 030143.5 030009.8 025755.3 (2) 49 49 49 53 52 49 18.42* 54 46 49 53 45 10.88 45 123.74 48 48 53 49 12.50 46 53 Err 49 47 49 53 49 53 54 12.32 (3) 0.71 3.81 2.05 0.39 1.01 7.27 0.38 3.92 1.62 0.73 3.02 2.14 0.50 0.74 0.47 2.74 2.20 9.20 0.49 0.78 7.07 2.70 0.91 7.57 0.43 0.79 3.38 2.05 3.51 0.36 0.24 1.10 0.21 1.33 0.47 4.24 0.83 2.43 2.18 4.59 0.40 0.47 0.55 2.21 2.93 Err Fx (4) 340.47 17.5 19.06 5.4 36.36 7.2 14.48 5.4 68.47 10.72 46.02 10.74 40.15 13.9 37.85 54.89 11.05 17.53 20.01 12.18 33.97 4.2 11.07 7.24 8.12 8.63 7.01 5.52 6.63 6.99 6.15 4.6 (5) 12.4 S7N 5.2 (6) 4.3 6.1 4.3 5.8 4.5 8.3 6.3 4.3 6.1 9.7 4.6 5.5 6.2 9.0 6.1 4.0 TABLE 3—Continued 163.1 218.8 310.5 120.9 102.9 Net C 36.5 56.6 44.9 25.4 42.0 28.8 46.2 13.2 30.8 45.6 56.0 15.7 17.7 75.6 22.2 40.5 12.4 37.8 59.4 11.4 39.0 53.4 Err 31.8 22.5 20.2 6.6 (7) 8.7 7.9 5.9 7.8 7.6 6.6 7.8 6.5 5.4 8.7 9.3 6.6 8.2 9.5 7.1 8.7 5.6 6.9 4.8 581 10582 13102 11954 11954 13851 13851 Bkg C 13851 12471 Time 3549 30.1 3549 4841 19.0 7775 11.8 4300 15.2 4300 10.9 6285 15.4 28.2 11.3 7775 6285 6285 1593 10.5 33.1 6285 19.3 1397 30.2 4713 31.6 26.0 2858 22.6 11.0 16.2 5556 1871 7.6 (8) 6.5 9.6 4.5 3.5 6.5 2.8 8.5 Ext C Seq n. 5453 2.8E+20 5453 2.8E+20 8404 4.1E+20 1884 2.0E+20 7044 3.5E+20Class1 4254 2094 4254 2094 2094 2.8E+20 2094 2.8E+20 7044 3954 7511 7414 6465 9084 1.2E+21 2338 9084 1.2E+21 6830 1.0E+21 6830 3952 6830 4545 9183 (9) 149 37 2.3E+20 2.3E+20 2.8E+20 2.8E+20 3.5E+20 5.4E+20 l.OE+21 1.2E+21 1.8E+20 1.0E+21 1.9E+20 1.0E+21 1.1E+21 4.6E+20 9.9E+20 (10) NH AGN STAR STAR STAR AGN STAR AGN STAR Class 1MSS2 AGN BL AGN AGN STAR STAR CL AGN STAR STAR CL BL CL STAR Source 27 12 3 (ID 1 1 1 1 2 5 2 2 2 1 1 1 3 2 Id PHL 8674 SAO 168572,MSS2 White Dwarf,EXO 032050.2-535559 (8") MSS2, EXO MSS2. SAO93280 031701.0+183445 (8") MSS2 MSS2 SAO 148731 (12) 19 90ApJS. . .72. .5 67G MS0331.1-0522 MS0330.8+0606 MS0327.2-2416 MS0353.3-7411 MS0335.4-2618 MS0334.2-3617 MS0333.1+0607 MS0331.3-3629 MS0354.6-3650 MS0353.6-3642 MS0348.2-1404 MS0341.9+0451 MS0337.6-0202 MS0336.3-2546 MS0334.8-3609 MS0358.0-2355 MS0357.4+1046 MS0356.9+1011 MS0354.2-3658 MS0350.0-3712 MS0340.3+0446 MS0340.3+0455 MS0339.8-2124 Source Name MS0358.3-3701 MS0357.7-2340 (1) R.A. (1950) +060756.2 +060628.5 Dec. (1950) American Astronomical Society •Provided bythe NASA Astrophysics Data System -362950.1 -052211.4 -241610.8 +045531.1 +045115.5 +044613.8 -020247.2 -261855.8 -360942.7 +104658.0 +101109.6 -365018.0 -365841.4 -741114.2 -371241.1 -140420.2 -212410.3 -254605.3 -364225.6 -370116.8 -235556.9 -234050.1 -361731.5 033107.2 033053.4 032714.2 033415.3 033306.2 033120.1 033736.2 033529.6 033448.1 035320.0 035002.9 034813.4 034022.3 034018.3 033952.2 033620.1 035727.8 035654.8 035437.6 035339.8 034157.0 035805.3 035744.1 035415.4 035821.6 (2) Err Fx 53 54 48 48 46 34.29 50 53 49 46 49 53 49 48 75.34* 46 27.92 49 45 80.37 50 51 48 49 49 46 49 49 10.88 49 (3) (4) 12.35 2.27 1.40 2.07 2.80 1.82 3.17 1.02 0.26 0.96 0.65 4.35 0.79 2.47 1.26 5.92 2.67 0.48 2.06 0.74 3.20 0.35 0.72 4.39 6.53 1.38 0.45 4.16 0.67 6.70 0.75 3.09 7.06 0.57 3.84 1.70 1.33 1.48 0.60 9.02 0.90 4.67 0.87 6.52 6.25 Err 171.43 15.1 237.62 6.1 311.60 130.27 11.3 20.51 31.31 15.13 16.49 29.62 12.69 4.4 29.17 16.02 14.17 24.54 5.2 25.60 4.4 28.75 15.07 4.4 31.25 10.5 45.12 15.42 4.1 5.41 4.6 5.37 7.02 9.35 6.97 (5) S/N 19.3 (6) 5.2 5.1 5.4 7.0 4.7 4.3 4.2 4.3 8.3 4.7 4.3 6.7 6.8 6.4 TABLE 3—Continued Net C 235.0 378.0 133.3 124.9 Err 57.6 56.7 10.0 15.5 23.3 22.0 27.9 21.1 41.6 40.8 83.1 28.2 39.6 26.3 30.5 28.7 19.6 23.9 52.1 22.3 11.7 32.0 24.8 11.9 32.9 48.9 (7) 5.4 5.4 5.2 7.6 8.7 5.4 7.9 8.1 5.7 5.6 5.5 6.4 5.5 7.7 7.6 6.6 6.5 6.9 6.7 6.3 582 Bkg C 10149 10149 Time 2102 2922 17.2 2922 18.7 17.9 2132 21.4 13.1 3313 15.3 2491 8482 6700 2140 2140 1137 1468 14.5 2306 2622 2622 2140 1651 15.0 8200 8200 8200 2249 10.1 17.1 6395 6395 (8) 5.9 5.7 6.0 2.4 5.0 9.5 5.9 4.9 4.7 4.7 6.8 5.2 7.1 6.7 6.1 Ext C Seq n. 2096 9.7E+19Class1 3059 1.4E+20 3059 1.4E+20 8397 1.4E+21 3894 6732 1.5E+20 1099 2346 4.0E+20 5116 1.2E+21 5116 1.2E+21Class1 5] 16 7162 6.9E+20 4087 l.OE+20 4129 1.4E+20 8397 1.4E+21 6369 4.3E+20 4579 1.4E+20 4901 2.8E+20 4578 4578 1.1E+20 4577 8.7E+19 4901 2.8E+20 4578 1.1E+20 6311 6311 (9) 159 94 2.9E+20 1.2E+21 1.2E+21 1.2E+21 1.1E+20 Class2 6.0E+20 (10) NH AGN AGN AGN AGN AGN AGN AGN GAL BL STAR AGN STAR Source AGN CL STAR Class 1 STAR AGN Class 1 STAR SAO93710 10 (ID 2 1 2 Id 1 3 1 1 2 1 1 1 1 1 2 1 1 A3186 MCG-04-09-052, IRAS, NGC 1386,IRAS MSS2 SAO 130647,IRAS S400 also SAO168750 SAO 168581 (12) 19 90ApJS. . .72. .5 67G MS0430.6+1754 MS0429.3+1755 MS0423.8-1247 MS0422.3-3838 MS0421.3-3916 MS0420.8-3904 MS0420.6-3839 MS0420.3-3900 MS0420.0-6252 MS0420.0-3838 MS0419.3+1943 MS0413.7-6235 MS0412.4-0802 MS0411.4+2327 MS0407.3-5551 MS0407.2-7123 MS0405.4-5625 MS0402.3+2152 MS0402.0-3613 MS0419.0-3848 MS0418.5-6240 MS0418.3-3844 MS0414.7-6315 MS0401.6+2150 MS0401.4-3617 Source Name (1) © American Astronomical Society • Provided by theNASA Astrophysics Data System +175510.8 +175452.4 -124714.3 -383825.5 -391612.9 -390403.0 -383906.0 -390013.0 R.A.(1950) -625210.2 -562550.8 +215221.1 -361307.0 +215029.2 Dec.(1950) -383846.7 +232712.0 -555104.0 -712350.2 -361715.4 -080257.2 +194353.1 -384853.5 -624035.0 -623532.1 -384441.1 -631528.6 043041.1 042921.6 042351.2 042222.2 042118.4 042053.5 042036.5 042021.6 042003.3 040721.4 040714.1 040205.2 042003.1 041922.9 041227.6 041129.9 040525.4 040221.4 040141.7 041900.3 041834.8 041820.9 041446.0 041345.3 040128.7 (2) 48 22.03 54 49 56 54 47 Err Fx 49 49 51 49 53 55 49 52 56 46 14.59 45 33.98 46 46 25.47 49 54 46 45 27.25 49 49 (3) (4) 2.29 1.21 7.65 0.46 1.87 0.24 1.11 0.26 2.43 1.12 0.26 0.18 0.75 0.17 1.14 0.37 2.89 2.40 5.23 1.54 0.19 0.82 0.46 2.06 2.33 2.44 2.42 2.16 0.45 0.92 0.20 0.88 0.50 0.59 4.13 1.16 1.14 0.97 4.65 0.31 1.67 0.86 1.03 9.98 9.85 Err 110.14 181.64 14.6 38.23 10.34 23.27 59.10 20.65 72.95 12.8 49.92 10.8 89.35 16.91 4.5 49.23 6.53 4.1 4.72 4.74 3.17 5.71 3.50 4.4 7.72 ccr 8.44 3.32 4.3 9.83 9.07 6.29 9.01 (5) S/N 12.6 11.4 (6) 9.6 6.3 4.6 4.3 4.1 9.5 5.3 6.6 4.2 4.5 5.4 4.0 4.8 8.8 4.9 4.1 TABLE 3—Continued 130.6 218.3 Net C 172.7 124.8 166.4 148.0 10.0 29.4 96.4 43.3 41.2 39.0 13.7 42.1 10.3 Err 11.9 79.2 31.7 24.1 22.4 30.6 28.2 13.5 11.6 10.1 44.6 40.6 15.0 82.6 37.6 41.6 53.7 13.2 31.1 13.0 (7) 6.9 7.4 8.9 9.1 7.6 5.6 5.4 5.8 7.9 7.1 8.8 8.6 7.6 9.4 9.9 583 11108 20716 20716 20716 20716 BJcg C 20716 Time 20716 10300 10300 20716 20716 2054 2054 26.3 37.8 44.0 57.4 26.3 63.9 62.8 8378 58.4 21.3 2185 2665 5048 3567 3567 26.7 20.0 3700 19.7 1939 1939 40.4 8378 26.9 8378 45.3 8378 (8) 3.6 4.7 5.7 5.8 8.3 5.4 4.9 8.6 9.2 8.2 Ext C Seq n. 4029 3721 3721 3721 2.1E+20 3721 2.1E+20 3721 3352 5.6E+20 4576 7918 7030 2.4E+20Class1 7918 1.2E+21 4576 7046 3721 8978 1.3E+21 7030 2.4E+20Class1 3816 3721 3721 2.1E+20 7046 3.4E+20 7046 7046 3.4E+20 (9) 867 1.7E+21 867 865 5.3E+20 74 1.7E+21 4.3E+20 2.1E+20 2.1E+20 2.1E+20 3.4E+20 8.1E+19 1.2E+21 8.1E+19 2.1E+20 Class1MSSl 2.1E+20 CL 3.4E+20 Class1 1.9E+21 (10) NH AGN STAR STAR Class 1 Class 1 AGN Class 1 AGN PKS0402-362,Hewitt STAR MSSl Class 1EXO STAR STAR Class 2 AGN STAR Source Class 1 STAR STAR CL 26 22 (ID 1 1 2 9 2 1 andBurbidge,1987 1 9 Id 8 1 n SAO 94002,IRAS MSSl SAO 76438,Gliese EXO, IRAS,MSSl 160, IRAS SAO 248969,IRAS SAO 76516 041227.8-080255(10) Comments (12) 19 90ApJS. . .72. .5 67G MS0502.8-1204 MS0501.0-2237 MS0459.5+0327 MS0457.9-0556 MS0457.9+0141 MS0457.5+0312 MS0452.2+0225 MS0451.6-0305 MS0451.5+0250 MS0450.6-5602 MS0450.3-1817 MS0449.4-1823 MS0448.4+1058 MS0444.9-1000 MS0447.1-0917 MS0443.9-0952 MS0439.7-4319 MS0439.0+0158 MS0443.8-1006 MS0440.5+0204 MS0440.0-1058 MS0439.8+0900 MS0438.6-1050 MS0438.5+0213 MS0433.9+0957 Source Name (1) © American Astronomical Society • Provided by theNASA Astrophysics Data System -120441.6 -223715.9 +032733.4 -055625.2 +014154.3 +031203.5 +022543.4 -030556.3 +025022.8 R.A.(1950) -560203.0 Dec.(1950) -181700.7 -105014.4 -182344.7 -431910.6 +015806.8 +021304.7 +095706.9 +105850.7 -091717.9 +090027.2 +020436.7 -100011.0 -095214.2 -100657.1 -105823.7 050252.5 050102.2 045931.1 045755.6 045755.1 045731.6 045213.0 045140.6 045133.0 045038.3 045023.2 043901.8 043837.7 043833.4 044924.8 043942.9 043355.8 044825.8 044031.0 044003.1 043948.6 044455.4 044350.0 044709.5 044354.4 (2) 48 49 49 49 13.52 60 49 49 49 72.74* Err 49 50 52 55 46 12.61 49 48 15.53 55 53 49 48 11.51 (3) 4 159.64 4 4 11.92 0.27 2.54 3.26 0.68 6.24 2.29 5.23 0.85 4.65 1.19 0.62 2.67 1.24 7.05 2.74 0.43 5.25 1.14 3.48 2.43 1.56 8.40 2.58 7.60 0.79 4.96 1.45 8.86 0.54 0.69 2.88 1.23 0.66 0.95 4.29 1.05 0.39 0.30 1.58 1.48 1.61 0.28 1.30 Err Fx (4) 469.09 221.10 12.68 9.3 13.20 26.14 15.55 5.5 40.15 35.23 13.36 10.45 18.84 30.12 21.18 44.28 50.99 24.81 33.39 11.08 42.04 6.4 13.62 4.5 14.41 ccr 8.44 8.05 7.90 6.50 4.7 (5) 25.6 S/N 12.0 (6) 4.8 5.9 4.4 5.7 4.3 6.1 6.4 4.6 5.4 5.3 4.8 5.3 6.1 4.1 7.8 4.2 6.2 6.3 TABLE 3—Continued 122.6 661.0 Net C 159.6 34.6 13.1 25.8 37.4 39.9 19.3 25.9 35.7 38.9 25.5 Err 61.8 32.9 25.5 23.6 41.3 35.2 26.6 46.4 40.0 44.9 44.3 33.2 42.0 13.3 67.8 (7) 7.1 6.9 4.7 6.6 6.2 6.4 6.6 5.5 9.7 5.7 5.6 6.1 6.8 7.3 7.5 7.7 7.3 7.0 7.3 7.9 8.7 6.6 584 14314 Bkg C 10489 Time 5660 49.4 2048 14.8 3591 1630 2048 12.0 4781 1500 1902 32.2 2112 2112 5103 3330 3330 3594 20.5 3330 20.4 4630 7387 18.7 1883 18.8 8860 8860 8860 4043 17.4 16.4 6059 (8) 5.0 3.2 9.6 4.1 5.4 3.8 4.5 4.1 4.7 8.4 7.9 4.7 8.4 9.6 6.5 10225 7.8E+20 Ext C Seq n. 8994 3145 5470 7360 3145 5025 6841 6715 7456 2.0E+20 5727 1.1E+21 3747 3195 6.0E+20 4011 4522 4522 4893 7630 1.4E+21 3748 5.4E+20 4522 9.5E+20 (9) 173 785 3.9E+20 785 3.9E+20 328 5.7E+20 328 5.7E+20 328 5.7E+20 2.5E+20 Class1 7.9E+20 5.0E+20 7.6E+20 7.9E+20 7.3E+20 4.9E+20 7.4E+20 2.5E+20 5.9E+20 1.4E+21 9.5E+20 9.5E+20 (10) NH STAR var. AGN AGN AGN STAR STAR STAR CL AGN AGN AGN AGN CL AGN AGN AGN STAR Source STAR STAR STAR STAR STAR 22 22 22 13 (ID 1 3 1 1 2 1 2 8 2 8 Id 8 2 8 1 1 8 HRI 7108 MSS2 SAO 112298,IRAS A520 PKS 0439-433,Hewitt MSSl HRI 10260 HRI 9719,MSSl MSSl HRI 10260 HRI 9719,MSSl and Burbidge,1987 HRI 9718,MSSl SAO 94163 Comments (12) 19 90ApJS. . .72. .5 67G MS0623.6-5238 MS0623.1-5223 MS0622.5-5256 MS0620.6-5239 MS0617.0-5847 MS0607.9+7108 MS0545.2-3211 MS0538.5-0949 MS0537.7-2829 MS0537.4-2843 MS0537.1-2834 MS0536.5-2818 MS0536.3-2849 MS0535.7-2843 MS0535.7-2839 MS0530.6-1140 MS0526.7-3301 MS0521.7+7918 MS0516.6-4609 MS0515.4-0710 MS0519.3-4544 MS0509.4-1607 MS0505.0-0527 Source Name MS0508.8-4523 MS0506.3-5108 (1) American Astronomical Society •Provided bythe NASA Astrophysics Data System +710828.6 -321126.7 R.A.(1950) -283436.8 -281819.1 Dec.(1950) -523858.3 -284303.1 -052755.0 +791837.3 -114035.0 -454437.5 -522334.8 -525608.0 -523948.4 -584716.9 -094918.5 -282921.1 -284335.3 -284936.9 -283923.8 -160724.5 -510822.3 -071059.9 -452303.4 -330131.5 -460917.7 062339.2 062308.4 062233.5 062037.2 061703.5 060754.7 054514.9 053833.8 053743.9 053725.7 053708.7 053630.2 053622.2 053547.8 050927.4 050621.1 052144.4 051639.6 050849.2 050501.1 053039.1 052647.2 051922.5 051529.3 053543.8 (2) 51 50 48 50 46 33.16* 53 49 13.04 50 49 Err 48 49 49 53 48 45 52 48 48 49 50 49 49 49 37.58* 45 67.21 46 (3) 2.26 0.38 0.39 0.50 3.71 2.63 1.81 0.74 2.07 4.24 1.32 2.36 0.58 0.14 6.47 0.59 0.19 1.37 2.00 0.17 0.24 1.02 0.23 1.98 0.36 7.54 2.75 2.64 2.99 5.52 2.00 2.74 5.45 0.24 7.08 0.60 1.17 1.11 0.62 1.25 4.98 0.75 8.27 6.30 1.04 9.22 Err Fx (4) 104.75 336.04 138.84 11.77 21.21 38.01 32.36 11.81 37.69 20.8 28.26 18.77 24.92 36.41 13.74 11.7 12.77 16.23 41.33 13.68 5.74 4.6 7.13 5.9 2.94 5.81 4.33 8.48 8.40 (5) 12.6 TABLE 3—Continued S/N 25.5 11.0 (6) 7.4 5.7 6.3 4.9 4.1 4.2 7.2 5.9 8.2 8.5 5.4 4.4 6.4 4.8 4.8 4.6 4.6 6.9 183.5 Net C 104.2 113.5 487.0 178.8 132.4 656.8 57.7 38.1 10.7 78.7 14.6 37.8 43.2 28.9 18.8 10.6 44.2 12.7 91.2 12.6 73.8 Err 12.7 23.5 13.3 24.5 15.3 28.3 24.5 26.8 49.8 25.5 55.4 34.2 25.8 12.0 (7) 8.2 9.7 5.7 6.9 6.9 4.9 585 5.5 7.8 5.5 5.3 7.8 6.0 6.0 6.3 11770 11770 11770 11770 23431 23431 23431 23431 23431 Bkg C 23431 23431 Time 37.3 29.9 35.3 29.5 4467 1743 2526 1536 68.8 70.8 84.2 57.8 56.2 63.5 3221 63.0 11.2 4139 3664 5852 3788 3805 1624 1624 12.6 1819 1662 (8) 3.8 9.3 4.0 5.2 5.4 5.6 7.7 3.5 5.7 4.5 8.2 9.3 Ext C Seq n. 6960 6.0E+20CL 6960 6.0E+20 6960 6.0E+20 4931 4.9E+20 2222 6960 6704 4921 3720 3720 3720 2.1E+20Class1MSSl 3720 2.1E+20Class1 3720 2.1E+20 3720 2.1E+20 5984 7.9E+20 3720 2.1E+20 2670 2.7E+20 2670 5471 8.0E+20 4498 2.0E+20 7677 7705 7673 1.7E+20 4435 (9) 706 310 1.1E+21 127 6.0E+20 8.1E+20 2.2E+20 2.1E+20 1.5E+21 2.1E+20 2.7E+20 5.7E+20 2.4E+20 9.6E+20 (10) NH Class 1 STAR SAO234435 STAR STAR SAO132453 STAR Class 1 AGN AGN AGN AGN AGN AGN CL STAR Source STAR STAR STAR STAR STAR 14 (ID 1 2 1 1 1 1 2 2 Id 1 1 1 1 1 1 1 MSS2 MSSl, MSS2 PKS 0620-526,MSS2 MSS1 EXO EXO SAO 170613,IRAS SAO 170610 052647.4-330121 (8") 051922.3-454422(20") Comments (12) 19 90ApJS. . .72. .5 67G MS0803.3+7557 080320.349 13.8253.225.9 MS0801.9+2129 080156.8468.7130.318.5 MS0801.7+2425 080142.249 MS0758.7+1411 075845.449 MS0754.6+3928 075437.84918.06 MS0745.1+5545 074509.849 MS0740.4+3734 074024.059 MS0737.9+7441 073755.2 MS0737.0+7436 073703.4 MS0735.6+7421 073540.5 MS0733.6+7003 073340.2532.42 MS0731.6+8011 073140.9 MS0730.3+6546 073019.5 MS0721.2+6904 072116.0 MS0719.9+7100 071959.649 MS0713.4+3700 071329.149 MS0657.5+7529 065735.3 MS0700.7+6338 070047.9 MS0657.4+7518 065728.9543.69 MS0624.4-5222 062425.9 MS0624.3-5519 062418.6 MS0648.1-5042 064810.5 MS0625.5-5532 062532.5 MS0625.2-5228 062516.5 MS0632.2-5351 063216.0 Source NameR.A.(1950)ErrFx (1) (2)(3)(4) © American Astronomical Society • Provided by theNASA Astrophysics Data System +755739.2 2.34 +212914.7 +242515.6 +141116.7 +392829.4 3.17 +554558.0 +373400.8 +744107.4 +743607.0 +742149.4 +700352.9 0.54 +801102.7 +654659.1 +690409.8 Dec.(1950) Err +710021.2 +370010.6 +633811.4 -522259.6 -551908.2 +752901.3 -553255.7 -522811.4 +751826.1 0.74 -504215.5 -535103.4 46 97.51 50 8.70 50 .42.93* 46 22.38 46 15.50 48 27.35 46 14.32 50 52 49 49 48 14.96* 49 8.71 1.02 0.43 2.31 0.38 1.98 1.36 8.30 0.44 5.51 1.89 1.81 7.53 1.41 5.05 0.53 1.61 5.73 1.66 7.65 2.97 1.25 2.55 2.08 3.37 1.26 0.62 2.30 0.50 0.42 0.40 1.86 0.35 1.95 366.52 17.7 150.81 11.54 59.61 28.42 32.70 86.54 15.9 25.24 55.97 28.33 17.62 71.59 11.4 48.02 90.82 18.47 16.86 11.51 9.89 6.06 8.43 8.08 6.06 9.73 (5) TABLE 3—Continued S/N (6) 5.4 5.2 5.7 6.1 4.3 5.7 4.8 4.5 9.5 9.6 4.6 4.6 5.0 5.4 5.1 5.6 5.5 4.7 7.2 9.2 319.2 265.1 Net C 137.4 39.4 85.0 10.0 38.5 41.1 37.7 43.0 32.4 27.7 18.0 36.3 33.5 16.7 Err 10.4 10.3 25.6 26.0 97.7 99.3 88.8 12.1 34.0 33.4 44.6 72.6 41.4 48.5 10.1 43.2 (7) 586 6.6 7.3 7.4 6.5 7.1 7.5 5.7 6.4 7.4 5.6 5.7 8.7 8.8 9.6 6.5 7.8 8.8 6.5 13678 Bkg C Time 11770 10925 10925 11770 5085 1303 16.0 5889 13.2 2007 2744 16.5 24.6 6021 2067 2067 2067 21.5 13.3 5988 9644 6740 11.3 3454 2479 2819 4197 3011 26.5 32.4 30.4 1747 4197 36.0 17.8 6959 (8) 3.5 4.5 7.0 5.3 4.8 4.7 5.4 6.7 8.6 6.0 4.2 7.8 8.6 10079 4.3E+20 Ext C Seq n. 5336 3.0E+20 8979 2622 6322 4.3E+20 6306 4.6E+20 4599 3.3E+20 4599 3.3E+20 4599 3960 7719 2098 5120 3554 3553 5488 4.8E+20 8955 8955 4676 4676 6960 6960 6063 6.9E+20 (9) 499 5.7E+20 119 589 4.0E+20 228 3.5E+20 5.2E+20 3.3E+20 3.4E+20 2.9E+20 3.8E+20 3.4E+20 5.1E+20 4.6E+20 5.5E+20 6.7E+20 4.6E+20 5.5E+20 6.0E+20 6.0E+20 (10) NH AGN AGN AGN STAR STAR AGN AGN AGN CL AGN CL AGN AGN AGN AGN STAR Class 1 CL STAR Class 1 STAR STAR Source STAR STAR 10 10 (11) 2 1 2 1 1 1 3 5 1 1 2 1 2 1 Id 1 1 9 A588 MSS2 SAO 14241,HRI584, MSS1 ESO 161-5 SAO 6053,IRAS SAO 6052,IRAS Comments (12) 19 90ApJS. . .72. .5 67G MS0830.3+2828 MS0830.3+1126 MS0829.9+0455 MS0829.4+1106 MS0828.7+6601 MS0828.7+6614 MS0824.2+0327 MS0822.0+0309 MS0821.5+0337 MS0824.0+2944 MS0820.2+0201 MS0818.8+5428 MS0822.4+0323 MS0822.1+2644 MS0816.2+7449 MS0815.7+5233 MS0815.3+7433 MS0811.6+6301 MS0810.5+7433 MS0810.2+6305 MS0809.9+4809 MS0808.0+4840 MS0806.6+2820 Sóurce Name MS0807.0+7426 MS0806.7+7453 (1) American Astronomical Society •Provided bythe NASA Astrophysics Data System +282810.4 +112618.0 +045511.8 +110625.5 +660121.1 +661404.1 R.A.(1950) +032707.7 +294439.3 +032302.1 Dec.(1950) +264404.6 +033730.1 +020135.0 +030949.6 +542813.7 +744954.2 +523338.1 +743345.0 +630131.4 +743313.3 +630518.0 +480925.8 +484027.7 +742645.8 +745321.5 +282011.3 083023.7 083019.8 082958.3 082928.4 082842.5 082842.3 082416.0 082401.0 082225.8 082208.5 082205.7 082130.3 082014.0 081848.2 081614.1 081547.4 081520.4 081141.1 081030.2 081014.0 080954.7 080800.9 080705.6 080643.1 080637.1 (2) 54 49 49 52 Err 48 53 49 50 49 49 52 73 50 54 53 53 49 49 47 12.42 49 53 49 48 49 49 (3) 0.33 0.87 1.40 5.16 6.02 1.10 1.01 4.24 0.70 4.90 2.48 0.58 2.65 0.22 0.92 0.41 0.22 0.97 3.20 0.57 0.27 2.84 2.93 2.54 1.46 0.38 1.57 0.47 0.44 3.15 2.94 2.25 2.97 1.40 0.70 0.27 0.59 0.34 0.34 0.45 0.62 0.31 1.11 1.49 1.79 0.29 1.26 1.02 4.27 Fx Err (4) 30.09 19.71 15.17 17.12 7.0 13.23 11.46 14.21 43.35 8.9 14.66 10.94 14.67 4.2 10.16 7.01 4.2 8.67 3.39 3.55 5.38 5.44 5.55 ccr 7.45 7.71 5.0 7.07 5.7 4.97 9.91 9.21 (5) S/N TABLE 3—Continued (6) 6.9 4.7 4.2 4.3 4.1 5.6 4.4 5.4 6.4 4.1 5.0 4.5 6.1 6.6 4.1 7.4 4.4 4.8 4.4 Net C 33.0 55.6 28.5 22.9 30.3 36.1 64.5 51.4 Err 43.5 54.1 34.2 59.5 30.3 43.5 28.3 37.5 49.0 86.9 31.7 39.1 52.5 21.1 10.4 77.2 32.7 32.9 (7) 587 7.8 8.0 6.0 5.5 9.2 7.1 8.9 8.1 7.7 8.7 9.8 8.1 7.5 5.0 9.9 9.7 9.1 6.7 6.9 7.3 7.9 6.9 7.6 9.2 11673 Bkg C 19451 19451 19451 Time 19451 12178 12178 12178 12178 12178 28.0 2858 2796 2858 20.5 6431 19.7 6431 42.9 52.5 13.6 39.6 5104 3261 22.5 6995 16.5 8199 44.9 4064 30.8 22.9 24.7 16.0 14.7 18.7 32.5 2609 19.7 19.6 8111 8111 9082 14.3 9082 (8) 8.4 8.0 7.1 8.0 3.9 Ext C 10231 Seq n. 10231 3.5E+20 10231 10231 5155 4.0E+20 2024 3.9E+20 7731 3.1E+20 2024 3.9E+20 3546 3.8E+20 5929 5933 3928 5933 5933 2.7E+20 8355 4.2E+20 5933 2.7E+20 5933 2.7E+20 3354 3.7E+20CL 8018 8018 4.2E+20 (9) 305 4.2E+20 305 246 493 4.6E+20 493 4.6E+20 4.2E+20 3.5E+20 3.9E+20 2.7E+20 2.7E+20 3.5E+20 3.5E+20 4.3E+20 4.3E+20 4.2E+20 (10) NH STAR STAR AGN AGN AGN AGN AGN AGN AGN AGN AGN Class 1 CL CL AGN AGN AGN AGN STAR STAR STAR STAR STAR Source 13 22 22 (ID 1 1 5 1 1 2 2 2 1 1 1 1 1 8 1 1 Id 1 SAO 97905 MS SI SAO 80190 SAO 116694 SAO 14468 (12) 19 90ApJS. . .72. .5 67G MS0850.2+1336 MS0850.0+2827 MS0849.8+2820 MS0849.7-0521 MS0849.7+2015 MS0849.5+0805 MS0849.2+2829 MS0849.0+2845 MS0847.5+2813 MS0847.4+3328 MS0845.1+1851 MS0845.1+3751 MS0840.8+2629 MS0840.2+1906 MS0839.8+2938 MS0844.9+1836 MS0842.7-0720 MS0842.6+1900 MS0841.7+1628 MS0838.6+1325 MS0838.2+1345 MS0834.0+6517 MS0833.3+6523 MS0832.8+5815 MS0832.6+6449 Source Name (1) © American Astronomical Society • Provided by theNASA Astrophysics Data System +133656.8 +282745.7 +282005.0 -052140.2 +201520.9 +080508.1 +282901.9 +284510.4 +281314.6 +332822.4 +190657.6 +293848.1 R.A. (1950) +185130.9 +375152.6 -072040.5 +162813.3 +262947.4 +132501.4 +183602.6 +190001.1 +134554.9 +651737.8 +652351.7 +581526.9 Dec.(1950) +644944.2 085016.0 085002.5 084949.6 084947.7 084945.1 084935.3 084915.6 084905.6 084733.8 084727.0 084510.7 083953.9 084507.5 084458.9 084242.9 084239.1 084142.3 084052.6 084012.3 083840.9 083813.4 083402.7 083323.5 083248.6 083236.0 (2) 50 11.40 49 48 51 12.34* 48 4.47 45 101.44 49 53 54 57 Err Fx 49 18.71 52 48 49 53 49 49 48 23.31* 55 49 53 49 46 49 (3) (4) 2.37 0.20 0.84 0.24 2.94 1.55 0.45 3.61 0.24 1.72 0.26 1.73 0.48 3.72 3.28 2.94 2.13 0.70 3.15 1.00 4.20 0.39 5.55 0.36 0.31 1.24 9.21 1.02 1.21 1.80 9.02 1.84 0.38 0.32 6.14 1.73 1.99 3.84 3.91 1.69 0.43 0.32 1.59 0.53 Err 345.59 28.1 41.88 4.8 45.06 17.18 9.9 14.08 36.30 14.71 23.17 21.29 32.67 78.27 93.54 15.96 10.63 13.31 13.58 3.18 4.1 5.87 6.4 6.51 6.54 7.19 7.04 5.67 5.3 6.13 5.40 (5) S/N (6) TABLE 3—Continued 4.2 5.7 7.3 6.7 7.8 4.2 5.4 5.0 5.1 4.2 7.4 7.4 5.6 5.2 4.6 6.0 8.9 4.9 7.4 128.1 798.4 Net C 100.6 26.5 42.3 10.3 27.4 11.4 73.3 28.4 12.9 12.1 89.1 34.5 22.6 28.6 58.0 10.8 72.3 83.6 21.0 27.4 10.7 40.2 55.5 Err 45.3 40.6 44.2 60.0 49.9 11.3 44.5 71.6 (7) 5.5 588 6.6 5.4 5.1 5.7 5.7 8.0 7.9 6.1 8.1 7.5 7.8 9.7 8.4 9.1 9.0 9.6 19155 20184 19155 Bkg C 19155 19155 19155 13647 13647 Time 12796 12796 12796 16603 57.7 1603 63.7 38.9 3481 15.6 6716 57.9 22.7 2080 43.7 30.4 2336 2336 2454 38.8 2018 5215 26.8 1529 32.1 27.4 36.5 21.4 11.7 19.9 9170 9170 (8) 3.4 2.5 5.6 9.6 5.0 4.4 4.0 95 9 6.4 6.0 Ext C Seq n. 5504 3.2E+20 5504 3.2E+20 5185 7954 1994 3.0E+20 5504 5504 3.2E+20 3033 5504 3.2E+20 3921 2.8E+20 5364 4932 7332 4059 2.7E+20 1840 3.1E+20 4059 2.7E+20 7867 3.2E+20 7332 2.8E+20 6964 6964 6964 4.4E+20 (9) 500 3.5E+20 114 102 486 486 503 4.7E+20Class1 2.6E+20 4.6E+20 3.2E+20 3.7E+20 2.8E+20 3.0E+20 4.2E+20 4.1E+20 4.1E+20 4.4E+20 4.4E+20 (10) NH AGN AGN AGN AGN AGN AGN AGN AGN AGN CL AGN AGN AGN AGN AGN AGN AGN STAR STAR STAR GAL AGN AGN Source 15 32 23 12 (11) 1 8 8 1 8 2 1 8 8 1 1 1 1 1 1 1 1 1 1 Id MSSl MSSl EXO MSSl HRI 8330,MSSl SAO 98098 Burbidge, 1987 SAO 61074,IRAS MSSl 084934.5+080457 (8") 3C204, Hewittand Starburst galaxy, IRAS Comments (12) 19 90ApJS. . .72. .5 67G MS0939.2+1212 MS0938.1-2340 MS0937.8+1153 MS0930.9+2128 MS0925.1-0605 MS0924.3+3942 MS0922.9+7459 MS0922.9-0610 MS0903.5+1711 MS0922.7+3420 MS0921.8+3451 MS0920.6+7838 MS0905.6-0817 MS0904.4-1505 MS0921.9+3920 MS0919.9+4543 MS0919.3+5133 MS0906.3+1111 MS0904.5+1651 MS0854.2+0543 MS0906.9+0654 MS0906.5+1110 MS0851.1+2025 MS0850.8+1401 MS0850.2+2825 Source Name (1) American Astronomical Society •Provided bythe NASA Astrophysics Data System +121209.6 -234049.1 +115314.3 +212806.8 -060513.2 +394244.6 +745937.2 -061009.8 +342045.3 +392003.6 +345100.0 +783823.6 R.A.(1950) +165118.4 -150553.6 +171128.2 +054322.5 +140103.3 +454339.3 +513354.6 +065439.6 -081712.0 +202503.7 +111050.8 +111140.5 Dec.(1950) +282515.7 093912.0 093811.0 093748.4 093058.9 092511.3 092420.3 092258.1 092258.0 092243.7 090332.8 085413.1 085109.0 092157.5 092153.2 090537.5 090427.3 090433.1 085053.4 092037.3 091957.3 091921.3 090634.0 090620.1 085017.3 090658.4 (2) 53 49 48 49 53 47 45 10.79 49 48 Err 53 50 53 11.92 53 10.13 49 46 10.44 48 48 30.63* 48 17.19 49 46 48 46 13.94* 49 (3) 0.25 0.25 0.30 2.14 1.00 1.57 5.36 1.03 0.37 1.62 0.56 4.57 1.25 1.15 9.00 0.80 6.39 0.49 3.85 3.77 2.51 2.25 2.46 0.36 1.68 0.64 2.77 5.52 3.69 0.93 7.73 0.67 1.12 0.29 0.24 1.98 1.52 1.02 1.57 0.23 6.85 1.37 9.44 Err Fx (4) 105.25 8.3 20.07 22.85 45.93 29.40 44.99 17.81 55.23 36.44 27.62 23.83 33.08 10.2 18.85 35.31 48.04 12.5 12.57 34.68 6.0 12.32 10.4 62.32 3.83 4.0 5.42 8.19 6.13 7.72 5.18 (5) S/N (6) 6.4 7.2 5.2 4.4 8.1 8.6 7.8 8.0 7.8 4.7 5.9 4.3 8.3 8.3 4.5 8.7 8.8 4.5 6.0 TABLE 3—Continued Net C 186.1 120.8 105.7 149.2 30.7 72.9 11.4 10.2 73.5 33.9 31.4 85.9 10.6 84.8 72.8 79.1 10.2 79.1 37.7 22.1 21.8 23.6 41.8 Err 78.9 78.7 73.6 81.4 14.9 11.8 12.0 14.3 37.9 10.6 64.7 (7) 7.6 6.6 6.9 9.9 9.4 9.7 8.0 7.1 5.2 5.3 4.9 8.9 9.4 9.4 9.5 6.5 589 31042 14115 14115 20184 Bkg C 13459 13459 Time 19155 27.3 57.1 31.5 4369 20.6 26.1 8544 9774 13.2 7952 14.5 8544 24.9 15.2 7427 26.3 5746 7427 3344 2374 36.9 37.3 2210 3459 3344 54.8 9774 4908 19.2 12.3 6080 1603 47.3 (8) 9.1 2.3 4.4 9.2 879 8.9 4.9 6.2 6.6 4.1 Ext C Seq n. 5516 . 7049 7952 8439 7952 2101 2101 1.5E+20 5789 6.0E+20 5506 4.3E+20 2099 5504 3.2E+20 4959 4959 7048 4.0E+20 9048 4.3E+20 1994 3.0E+20 6844 1.8E+20 6315 1.5E+20 (9) 530 3.0E+20Class1 530 554 554 1.5E+20 445 481 143 128 481 3.7E+20 500 3.5E+20Class1MSSl 192 4.5E+20 Class1 3.0E+20 3.3E+20 3.2E+20 2.1E+20 1.5E+20 3.2E+20 1.5E+20 3.7E+20 3.7E+20 3.7E+20 1.4E+20 (10) NH AGN AGN AGN BL STAR AGN STAR AGN AGN AGN AGN AGN AGN CL AGN AGN STAR AGN STAR STAR STAR Source 24 22 16 12 (11) 8 1 2 1 1 1 1 3 8 1 1 1 1 1 8 Id MSSl Gliese 343.1 SAO 136833 A744, MSSl MSS2 HRI 8320,MSSl SAO 80493,EXO HRI 8330,MSSl 085108.8+202502(15") Comments (12) 19 90ApJS. . .72. .5 67G MS0939.8+0952 MS0941.7-2348 MS0939.8-2328 MS1018.2+2010 MS1008.1-1224 Source Name MS1011.0+5708 MS1006.7+8145 MS0942.8+0950 MS0944.1+1333 MS1006.3+8212 MS1006.0+1202 MS0948.2+0822 MS1004.9+1316 MS0950.2+0804 MS0950.9+4929 MS1004.2+1238 MS1003.6+1300 MS0958.4+6913 MS0954.5+6717 MS0952.3+4412 MS0958.9+2102 MS0957.0+6856 MS0956.8-2225 MS0958.1+6706 MS0955.7-2635 (1) R.A. (1950) American Astronomical Society •Provided bythe NASA Astrophysics Data System Dec. (1950) +095239.9 -232858.5 -234800.9 +201015.9 +095027.9 +570852.7 +814523.0 +120258.4 +082233.9 +133332.9 +821208.5 +131605.6 +123842.9 +080447.7 +492944.3 +130011.5 +210247.4 -263547.7 +671751.7 +441205.1 +691301.5 +685657.4 -222513.5 +670626.0 -122459.8 093952.4 093953.1 094146.9 094410.3 094248.6 101813.5 101102.9 100807.3 100643.0 094817.8 095054.3 095012.2 100621.1 100605.1 100454.5 100413.7 095435.3 095223.3 100340.9 095855.7 095825.5 095810.7 095702.2 095650.3 095544.1 (2) Err Fx 51 51 50 53 45 42.31 53 52 46 38.98 54 49 14.70* 49 49 22.63* 53 49 49 49 20.75 49 51 52 49 47 15.74* 49 49 48 46 26.07 (3) (4) 5.90 1.23 2.38 0.23 1.03 0.14 1.00 2.14 2.07 3.90 8.76 3.43 0.41 1.86 0.80 4.34 0.71 3.11 3.65 2.52 0.76 2.63 0.32 2.75 5.41 0.51 1.36 0.52 2.01 2.68 1.39 6.39* 0..4 9 2.27 8.02 0.47 0.42 1.69 1.02 1.04 0.86 7.77 1.97 Err 164.15 147.97 107.80 130.35 11.5 22.90 35.90 4.1 46.23 7.1 77.43 21.92 4.6 15.99 27.19 17.15 11.45 51.05 9.3 38.86 40.10 ccr 3.56 4.99 9.92 6.79 9.70 7.90 7.12 (5) 9.95 9.70 S/N 17.8 10.0 (6) 4.8 7.4 5.4 4.5 4.5 4.4 4.5 4.3 5.3 4.9 6.2 5.7 5.2 7.9 4.1 4.7 7.9 9.0 TABLE 3—Continued Net C 322.2 101.7 139.5 Err 28.2 46.3 13.1 23.6 10.4 97.6 25.8 38.2 18.1 29.7 10.2 19.2 30.1 36.6 62.1 41.5 31.6 34.1 40.4 24.3 64.3 36.3 69.6 46.7 89.3 10.6 (7) 12.0 99.3 5.8 5.9 8.5 5.3 4.7 7.1 7.5 6.6 7.1 5.9 8.2 6.7 6.9 7.7 8.9 8.2 6.6 7.8 9.9 590 Bkg C Time 31042 31042 3350 3350 74.4 61.7 2055 1228 3676 5432 1462 10.9 4589 4045 12.8 14.0 4045 1694 19.4 1633 7094 20.0 3161 19.9 15.1 21.3 4443 (8) 7094 7094 24.8 5477 10.7 8153 8153 4443 1641 13.8 6518 5.8 2.3 2.8 4.5 6.8 3.5 2.7 9.4 8.9 8.7 4.5 9.1 Ext C Seq n. 10242 3447 2.9E+20 5516 5516 3447 2.9E+20 4944 3.1E+20 5934 7793 2.4E+20 5188 5188 1842 4936 2229 9696 2105 3.7E+20 2105 3.7E+20 (9) 5251 1788 3.5E+20 6853 1.1E+20 1788 3.5E+20 251 155 563 3.8E+20 563 563 217 253 2.8E+20 94 72 4.5E+20 4.5E+20 3.0E+20 3.0E+20 8.1E+19 3.5E+20 3.5E+20 3.8E+20 6.1E+20 3.8E+20 3.8E+20 9.2E+19 5.2E+20 4.5E+20 (10) NH AGN AGN AGN AGN STAR Source BL AGN AGN CL AGN STAR AGN CL AGN Class 1 CL AGN STAR STAR AGN AGN CL STAR STAR 24 27 15 13 (11) 13 1 8 Id 1 1 1 3 1 1 1 1 1 1 1 1 SAO 177863,MSS1 SAO 117942,IRAS MSS2 SAO 98959 SAO 178272 Comments (12) 19 90ApJS. . .72. .5 67G MS1053.5-0310 MS1052.7-0319 MS1050.9+5418 MS1050.7+4946 MS1050.1-0925 MS1049.4-0849 MS1048.5+5421 MS1047.3+3518 MS1020.2+6850 MS1019.8-1016 MS1047.0+3537 MS1046.2+1442 MS1046.1+1411 MS1045.1+3450 MS1020.7+6820 MS1019.7-1027 MS1018.5+4830 MS1022.3+1259 MS1044.2+3531 MS1043.9+1400 MS1022.6+1121 MS1019.0+4836 MS1019.0+5139 MS1030.2-2757 MS1022.8+6844 Source Name (1) R.A.(1950) Dec.(1950) American Astronomical Society •Provided bythe NASA Astrophysics Data System +483018.3 +483632.9 +513923.8 -102738.1 -031013.5 -084921.4 +542124.2 +351808.7 -092528.4 +353758.5 +685010.4 +541822.6 +494617.4 +144230.5 +682057.6 +141105.4 +345053.8 +112126.4 +125917.4 +353146.5 +140041.1 +684437.8 -031944.0 -101626.2 -275739.9 101833.3 101902.2 105331.6 105009.1 104927.8 104833.7 101904.7 105242.3 105057.4 105047.1 104722.0 101946.6 101948.0 104701.3 102016.6 102047.0 102218.5 104614.2 104606.0 104508.1 102236.4 104414.7 104354.7 103017.4 102253.1 (2) Err 53 50 53 50 50 48 13.28 49 14.09 49 46 103.74 54 48 46 49 50 48 54 50 52 49 52 53 48 49 53 (3) 49 14.60 3.46 0.72 3.20 2.70 2.35 5.80 1.66 0.25 1.11 0.31 1.14 4.89 4.36 3.04 0.63 1.50 0.99 0.89 3.01 0.76 6.61 0.89 2.86 9.21 3.17 0.68 6.24 0.82 4.61 0.56 3.90 3.63 2.31 0.79 0.65 0.71 3.44 3.93 2.43 0.58 0.76 0.77 1.33 0.45 1.90 6.89 Fx Err (4) 518.69 17.9 25.76 57.00 33.04 21.80 16.00 10.3 39.95 10.4 27.07 16.98 4.8 13.24 68.49 10.25 17.96 15.04 15.20 12.15 15.73 34.43 14.92 14.09 11.55 11.97 48.97 ccr 4.04 4.4 8.06 (5) S/N TABLE 3—Continued (6) 8.0 4.3 4.4 4.4 6.0 5.6 4.3 7.0 4.4 4.0 5.1 7.0 5.1 5.2 4.4 4.5 4.0 4.0 4.2 6.0 Net C 137.4 323.5 117.3 Err 29.9 25.4 21.4 22.9 27.0 41.1 38.8 28.1 13.2 18.1 56.1 68.2 11.3 39.4 31.1 19.5 24.5 27.3 33.5 28.2 34.0 32.3 31.4 62.2 40.5 (7) 591 5.6 5.2 8.5 4.9 5.3 6.2 9.2 6.5 8.1 6.2 7.1 5.9 8.8 7.1 6.1 6.6 7.6 6.8 6.2 6.1 6.6 6.7 Bkg C Time 18323 18323 3100 3100 42.1 37.0 5168 2715 1766 1788 1180 5168 2715 12.0 1779 1779 1788 5168 25.4 2493 18.9 11.9 5168 4921 18.7 6144 6112 15.8 2415 10.6 6144 6112 10.0 (8) 6144 6112 5.6 2.6 4.9 3.2 9.1 8.5 4.1 4.6 8.9 9.7 9.8 5.4 9.5 9.8 4.5 Ext C Seq n. 2611 4614 1.2E+20 5369 3.0E+20 3964 4025 5369 3964 4614 4025 3.7E+20 3442 1.9E+20 3442 1.9E+20 6682 1.3E+20 5793 5793 7050 3442 3442 5793 7700 3.9E+20 7050 2.1E+20 7701 (9) 7050 416 416 429 4.8E+20 1.2E+20 9.5E+19 3.7E+20 3.0E+20 2.1E+20 8.6E+19 8.6E+19 4.8E+20 2.9E+20 2.9E+20 2.1E+20 3.4E+20 2.9E+20 1.9E+20 1.9E+20 4.9E+20 (10) NH AGN AGN AGN Source AGN AGN AGN CL AGN AGN STAR STAR STAR AGN AGN STAR STAR AGN AGN AGN AGN AGN STAR GAL STAR 22 17 (ID Id 1 1 2 1 2 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 AM Hertype CV A981 Zwicky galaxy,IRAS SAO 99104 NGC 3367,IRAS Comments (12) 19 90ApJS. . .72. .5 67G MS1053.8-0354 MS1114.6+1814 MS1114.4+1801 MS1053.9-0332 MS1053.9-0319 Source Name MS1112.6+1311 MS1112.5+4059 MS1111.8-3754 MS1110.7-2611 MS1110.3+2210 MS1109.8+3605 MS1109.3+3544 MS1054.4-0321 MS1109.2+3814 MS1108.3+3530 MS1105.4+3747 MS1100.3+4507 MS1054.8-0335 MS1100.2+6155 MS1059.6-2236 MS1059.0+7302 MS1058.8+1003 MS1058.7-2227 MS1058.2+1220 MS1055.1-0400 (1) © American Astronomical Society • Provided by theNASA Astrophysics Data System R.A.(1950) Dec. (1950) -035408.4 -033228.3 -031913.6 +181417.2 +180110.7 +131108.4 +221054.4 +374743.6 -040056.5 -033523.0 +405946.8 +360537.6 +354431.1 +381415.3 +353050.9 +450757.7 +615533.0 -223609.6 +100308.8 -222736.9 +122024.0 +730242.4 -032124.3 -375421.4 -261157.7 105353.7 105356.0 105427.6 105356.9 111437.9 111426.6 111238.5 111153.9 105449.4 111234.1 111046.3 111019.5 110949.2 110923.4 110913.8 110819.0 110524.2 105812.6 105509.0 110022.6 110016.7 105937.8 105905.4 105850.1 105847.3 (2) Err 50 49 49 52 54 52 48 46 46 49 46 49 52 56 58 52 46 49 49 49 49 49 49 67 60 (3) 53.48* 29.12* 15.45 13.58 3.48 0.86 0.45 2.27 0.20 5.23 2.02 2.62 0.23 1.11 0.36 3.04 3.10 5.34 2.64 3.06 0.27 0.22 1.02 0.42 1.85 0.55 0.81 0.62 0.70 0.97 0.49 0.25 3.46 0.60 0.64 0.31 6.01 1.91 1.10 0.30 9.55 1.13 0.82 4.49 0.92 4.62 4.62 6.77 1.04 1.46 Fx Err (4) 156.91 12.67 30.05 16.8 26.10 22.62 33.83 22.44 52.36 12.86 13.58 13.18 11.15 67.48 14.1 17.32 18.98 93.90 3.15 8.24 4.05 4.73 5.57 8.82 9.57 9.26 6.1 9.53 (5) S/N (6) 7.7 TABLE 3—Continued 4.4 5.6 4.9 4.6 5.5 8.4 4.5 8.4 4.9 4.4 4.1 5.0 8.5 9.5 4.5 4.2 4.4 4.8 4.3 6.3 9.3 Net C 331.7 212.7 107.9 103.1 107.2 Err 80.6 50.1 40.4 10.4 19.7 30.1 33.9 54.5 10.2 40.4 30.8 24.9 36.4 25.6 27.5 30.2 12.8 15.1 11.2 78.5 21.6 21.7 44.4 40.2 12.4 40.9 10.2 95.7 (7) 9.3 8.8 5.8 5.8 5.2 5.1 8.4 6.6 8.8 7.0 6.1 9.4 6.2 6.8 6.6 6.3 9.1 592 Bkg C Time 18323 18323 18323 18323 16042 18323 16042 18323 13220 28.4 56.1 53.9 45.6 57.3 37.6 23.2 5929 29.8 3991 3991 5844 3991 5844 2357 47.7 13.9 4823 4749 7174 3948 1612 16.4 15.3 1606 18.8 13.9 42.1 1779 9966 1612 (8) 3.1 5.4 8.4 7.6 4.6 4.3 9.5 9.7 9.3 6.5 Ext C Seq n. 4025 4025 3.7E+20Class1 4025 3927 1.5E+20 3927 1.5E+20 5797 1.8E+20 2112 1.1E+20 4025 3.7E+20 4025 3.7E+20Class1 3122 2.1E+20 3122 2.1E+20 3238 1.9E+20 3122 3238 1.9E+20 7911 2.1E+20 4025 3.7E+20 4923 7034 5.3E+20 3249 1.1E+20 7844 2.4E+20 1947 3.0E+20 1121 1121 5.3E+20 (9) 488 1.9E+20 106 105 850 8.0E+19 75 3.7E+20 3.7E+20 2.1E+20 5.3E+20 CL 9.0E+20 (10) NH AGN AGN Source AGN AGN AGN AGN AGN AGN AGN AGN AGN AGN AGN STAR AGN CL STAR STAR STAR STAR STAR STAR 27 22 18 12 13 (ID Id 1 1 1 1 3 1 1 1 1 1 1 1 1 1 1 1 EXO A1146 EXO, MSS2 CV, AMHertype,EXO SAO 15379 SAO 179648 SAO 62451,IRAS 105909.9+730236(35") 111437.8+181402 (8") 111235.2+405946 (8") Comments (12) 19 90ApJS. . .72. .5 67G MS1156.5+5323 MS1154.1+4255 MS1152.9+2344 MS1148.5+3533 MS1148.3+7125 MS1147.3+1103 MS1145.1+0033 MS1143.6+2040 MS1143.5-1643 MS1143.5-0411 MS1138.6+6553 MS1142.4+6610 MS1140.7+7158 MS1139.7+1040 MS1138.1+0400 MS1137.5+6625 MS1136.7+2852 MS1136.5-0903 MS1136.5+3413 MS1134.7-0900 MS1133.7+1618 MS1127.8-1502 MS1127.7-1418 MS1115.3+1824 MS1125.3+4324 Source Name (1) +532311.0 American Astronomical Society •Provided bythe NASA Astrophysics Data System +425500.5 +234406.1 +353344.5 +712513.0 +110318.3 +003319.0 +204022.8 R.A.(1950) -164358.2 -041103.2 +715802.7 +104015.0 +655340.4 Dec.(1950) +661044.5 +040044.1 +662519.2 +285240.0 -090359.5 -090007.6 -150246.6 -141802.8 +432443.5 +341314.5 +161821.8 +182444.1 115635.9 115411.9 115259.9 114831.5 114821.1 114721.3 114510.1 114337.3 114331.0 114044.7 113942.3 114330.3 114224.7 113839.6 113735.6 113808.6 113646.0 113447.0 113342.8 112753.5 112746.1 112518.2 111521.6 113634.2 113633.7 (2) 49 49 54 49 49 49 53 53 Err 60 56 48 46 48 50 49 49 52 54 49 53 53 46 48 49 49 (3) 12.08 61.35 48.71 73.65* 10.37 0.62 4.03 0.81 4.04 2.39 1.27 7.37 0.57 3.38 1.83 8.98 0.80 3.71 5.95 0.82 2.01 1.45 0.48 1.05 0.43 4.61 9.06 1.88 1.78 0.27 2.81 2.14 1.26 0.67 3.85 0.40 0.64 0.69 2.95 2.24 2.31 3.45 3.55 0.55 0.72 8.80 0.46 0.22 0.97 1.80 Err Fx (4) 306.77 13.3 212.87 14.1 251.93 18.40 16.19 5.0 31.69 11.94 41.44 12.39 4.2 21.72 18.53 35.74 44.98 11.87 14.73 10.34 44.02 14.01 7.49 9.56 6.41 8.92 8.37 8.61 4.51 (5) S/N (6) 6.5 5.8 4.2 4.9 4.5 4.2 8.6 4.4 4.7 6.8 4.2 5.3 5.0 6.0 4.3 4.1 4.9 4.9 7.1 4.5 1.1 TABLE 3—Continued 182.4 Net C 202.0 51.7 33.5 38.6 23.8 30.8 25.3 24.9 20.8 30.2 86.4 30.5 10.0 50.1 Err 13.7 40.1 23.3 28.9 45.6 47.3 25.8 27.3 30.6 54.7 40.8 14.4 40.7 (7) 8.1 6.7 5.7 6.7 5.6 5.1 6.1 6.0 6.8 7.0 7.3 8.4 5.8 8.6 7.7 5.6 6.7 8.1 6.3 7.7 6.2 9.0 593 Bkg C 10427 10427 Time 10427 16042 13.1 4308 11.4 4388 2976 1738 2887 1546 2439 10.3 4228 3707 15.9 7311 13.6 30.8 18.5 1546 2931 28.6 1619 10.4 2442 11.8 4807 3379 25.5 6037 16.1 4807 8319 40.2 14.2 1786 1786 (8) 8.2 6.4 5.2 6.2 7.1 3.9 4.6 4.0 5.3 8.4 3.7 Ext C 10229 3.4E+20 Seq n. 5232 1.6E+20 7760 1.4E+20 4605 8705 5190 2.6E+20 6244 7712 5421 7618 5421 1.0E+20 5356 2.1E+20 5421 1.0E+20 6244 6694 3.4E+20 3530 8995 5938 2.7E+20 5231 3927 6348 7300 3.8E+20 7300 8995 3.3E+20 (9) 308 2.0E+20 395 297 1.9E+20 2.5E+20 CL 2.3E+20 1.5E+20 2.7E+20 1.0E+20 1.5E+20 3.3E+20 2.3E+20 1.9E+20 3.8E+20 1.9E+20 1.5E+20 (10) NH AGN CL AGN AGN STAR GAL AGN AGN AGN STAR AGN AGN AGN CL AGN STAR GAL AGN BL AGN CL Source STAR 15 10 25 (ID 1 1 1 1 1 1 1 1 1 1 1 1 1 Id 1 1 Gliese 450 EXO NGC 3884 WE 1138+65,EXO CV MCG-01-30-018 114507.1+003141(45") DO Dra A1285 HD 100022 113838.1+655309(15") Zwicky galaxy Comments (12) 19 90ApJS. . .72. .5 67G MS1157.3+5548 MS1200.1-0330 MS1158.6-0323 Source Name MS1204.1+2826 MS1201.5+2824 MS1200.2-1829 MS1205.7-2921 MS1205.7+6427 MS1207.9+3945 MS1208.2+3945 MS1208.7+3928 MS1208.6+3924 MS1209.0+3917 MS1217.4+7549 MS1217.0+0700 MS1211.2+3654 MS1216.3+0216 MS1211.8+1206 MS1216.1+2818 MS1215.9+3005 MS1215.2+2847 MS1214.7+2806 MS1214.3+3811 MS1213.8+3809 MS1215.0+6932 (1) American Astronomical Society •Provided bythe NASA Astrophysics Data System R.A. (1950) Dec. (1950) -032357.1 +554828.4 -033008.8 +282408.3 +642726.9 +282646.0 +394551.5 +394504.6 +392446.5 +392846.7 -182900.8 +391757.6 +365428.8 +754906.8 +070009.3 +021616.6 +281841.9 +380924.1 +120602.3 +300536.0 +284721.2 +693210.1 +280652.7 +381115.8 -292116.0 115722.0 120011.6 115841.4 120017.9 120544.6 120410.6 120131.0 120544.7 120754.8 120817.9 120844.1 120836.5 120903.0 121726.1 121114.3 121150.6 121700.4 121622.9 121352.8 121608.6 121556.7 121516.1 121503.5 121442.6 121423.4 (2) Err Fx 49 54 53 45 64.01 50 48 49 27.08* 46 49 48 46 (3) (4) 50 52 52 53 49 49 54 48 45 81.49 48 49 46 14.80 2.68 2.37 2.42 7.02 1.53 5.92 5.53 0.58 0.59 3.23 0.94 0.62 0.72 6.84 3.29 0.52 0.27 2.83 2.48 0.20 0.29 1.35 2.83 3.75 0.33 0.74 2.52 0.99 8.28 0.37 8.81 3.81 0.30 0.51 0.37 4.42 0.21 0.91 1.49 1.04 4.89 0.24 0.34 1.49 4.06 1.10 Err 258.49 26.4 105.19 369.91 21.4 34.34 26.57 25.30 10.31 62.69 28.5 13.92 12.0 11.98 39.95 5.9 21.30 11.01 7.6 41.40 14.59 12.59 17.81 19.31 11.9 ccr 9.56 9.47 6.73 (5) 5.52 9.33 4.56 6.53 S/N (6) 4.6 4.0 4.9 7.3 4.6 4.5 9.5 5.1 8.7 8.6 6.8 8.4 8.4 7.9 4.3 4.7 4.6 4.4 TABLE 3—Continued Net C 711.0 112.9 875.7 192.7 101.7 112.5 462.3 177.6 104.4 Err 24.1 22.8 26.9 28.7 30.3 31.3 11.9 64.0 30.7 16.1 75.6 11.1 (7) 34.1 12.9 39.8 23.7 11.9 82.0 36.4 21.6 33.0 38.2 80.8 in o 12.4 10.2 82.3 14.9 5.3 5.7 8.6 6.2 6.2 6.8 5.3 8.8 6.7 6.7 7.9 7.2 9.6 594 Bkg C Time 19929 19929 19929 19929 19929 13113 10103 13735 13735 10103 13485 10103 5213 1282 4071 4071 12.0 28.1 4176 4176 10.3 6486 14.9 6561 65.3 53.5 67.3 39.3 48.4 (8) 3709 34.5 2136 26.6 2433 20.5 21.7 38.8 4893 10.9 1408 11.2 49.6 44.4 3.9 7.7 9.2 9.8 5.2 4.2 5.7 Ext C Seq n. 4548 1.2E+20 4289 2.5E+20 7054 4.1E+20Class1 4289 2.5E+20 5801 5.7E+20 4258 4258 1.7E+20 6865 2.0E+20 (9) 5424 2.9E+20 7817 1.7E+20 5374 1.6E+20 5153 1.9E+20 2715 1.6E+20 5153 1.9E+20 7473 2.3E+20 5803 1.8E+20 7036 1.8E+20 7036 1.8E+20Class1 7036 1.8E+20 164 353 2.1E+20 353 2.1E+20 353 2.1E+20 353 2.1E+20 353 2.1E+20Class1 532 1.9E+20 1.7E+20 (10) NH AGN AGN AGN GAL AGN Source BL AGN STAR AGN AGN GAL AGN AGN AGN AGN STAR STAR STAR STAR 29 19 (ID 24 Id 1 3 1 1 1 2 2 2 1 1 1 3 1 1 1 1 MSS2 NGC 4104,IRAS MS Si Mkn 1310,EXO NGC4156, HRI340,EXO HRI 340,EXO,MSSl MSSl 115840.7-032354(15") 120754.9+394546(15") NGC 4190 SAO 62883 120816.7+394532(10") SAO 100003,AHVir MSS2 Mkn 766,IRAS,EXO 121554.1+300504(40") (12) 19 90ApJS. . .72. .5 67G MS1244.2+7114 MS1242.4+1749 MS1242.2+1632 MS1241.5+1710 MS1239.2+3219 MS1237.9-2927 MS1235.4+6315 MS1219.9+7542 MS1234.9+6651 MS1222.5+2549 MS1221.8+2452 MS1220.9+1601 MS1233.3+7426 MS1224.7+6733 MS1223.5+2522 MS1219.6+7535 MS1224.7+2007 MS1219.0+7528 MS1232.4+1550 MS1231.3+1542 MS1229.9+2039 MS1229.2+6430 MS1224.7+7531 MS1218.6+7522 MS1218.0+7538 Source Name (1) +711440.4 American Astronomical Society •Provided bythe NASA Astrophysics Data System +174924.2 R.A.(1950) +163252.3 +171035.7 Dec.(1950) +321922.5 -292723.9 +753537.9 +752848.9 +752227.5 +753839.3 +160145.8 +754254.6 +631535.3 +245257.7 +665120.9 +252256.0 +254939.9 +742651.3 +155047.3 +203926.6 +643055.2 +673342.8 +154206.2 +753146.8 +200741.7 124412.1 124229.3 124213.2 124132.6 121904.8 121838.9 123917.9 121956.5 121940.4 121802.5 122058.9 122153.4 123757.1 122231.0 122333.9 123526.3 123458.1 123319.0 122956.7 122917.1 122442.2 123224.6 123121.3 122444.2 122443.9 (2) 52 49 Err Fx 46 16.28 53 53 49 52 48 45 106.43 46 46 46 18.64 49 12.49 49 53 51 49 49 13.63 49 50 49 45 33.73 48 49 17.77 (3) (4) 3.72 8.78 0.87 1.91 1.29 1.20 4.78 0.99 4.64 3.48 5.21 0.87 2.67 3.32 5.39 2.90 0.36 4.29 0.25 0.38 0.45 1.43 2.58 5.58 1.00 1.17 0.51 2.68 5.99 7.03 0.85 1.60 1.28 0.27 1.60 1.95 6.81 1.38 1.45 1.22 1.49 6.08 9.85 Err 402.57 24.8 145.47 12.6 34.85 16.50 4.3 70.23 12.6 22.37 18.51 17.38 83.93 23.29 27.87 56.51 25.24 12.91 18.69 12.31 22.58 21.88 4.9 30.30 73.26 68.13 49.24 3.87 ccr 9.60 7.25 (5) S/N 13.0 11.5 (6) 4.6 4.0 4.7 4.0 5.3 4.6 5.7 7.5 8.7 7.0 7.8 4.0 5.3 4.4 4.4 6.9 6.6 6.6 TABLE 3—Continued 168.8 Net C 177.8 105.8 170.2 620.1 164.2 23.2 23.3 13.4 23.9 Err 19.6 19.0 25.0 26.1 53.2 35.4 85.8 35.6 13.6 50.8 22.0 50.4 11.5 12.2 14.8 22.7 47.6 29.9 64.4 48.5 49.0 13.1 (7) 5.1 5.5 5.0 5.4 4.8 5.7 5.0 8.4 8.8 8.4 5.3 7.6 7.6 7.4 6.4 7.3 9.1 6.1 595 Bkg C Time 13113 13113 13113 13113 13113 1376 2598 3814 11.1 2598 3048 1501 3559 2896 2047 3009 3009 3009 46.6 43.2 23.2 5723 1914 42.4 47.8 3552 34.5 3644 1307 1729 1729 1672 (8) 2.7 6.7 5.5 5.3 3.8 5.6 5.6 5.9 8.2 5.9 3.0 5.4 7.6 4.8 4.2 5.0 7.1 6.8 Ext C Seq n. 10243 3473 1.5E+20 5343 1.8E+20 3241 2.0E+20 5343 1.8E+20 5424 2.9E+20 4980 5.9E+20 5424 2.9E+20 5233 3.2E+20 5424 2.9E+20 5424 2.9E+20 4301 2.4E+20 3472 2.0E+20 6871 1.7E+20 5424 2.9E+20 9159 7795 7795 3967 2.6E+20 1996 2.6E+20 6868 (9) 471 1.3E+20 565 1.6E+20 565 1.6E+20 565 1.6E+20 273 2.1E+20 1.9E+20 2.3E+20 2.3E+20 2.0E+20 (10) NH CL AGN AGN CL AGN AGN AGN CL AGN Class 1 GAL AGN Source STAR AGN AGN AGN STAR AGN BL CL STAR STAR 27 22 27 (11) 1 7 1 3 3 5 1 2 1 Id 8 1 1 1 1 MSS2 MSS2 NGC 4291,MSS2 Mkn 205,EXO HRI 4968 EXO, MSS2 MSSl SAO 82295 121933.6+753513 (8") EXO 123525.8+631511 (8") IC 3528 122955.1+203948 (8") Comments (12) 19 90ApJS. . .72. .5 67G MS1246.3+3758 124623.9502.7813.004.0 MS1246.5+3440 124631.5483.6117.287.3 Source NameR.A.(1950)ErrFx MS1247.0-0548 124703.5412.7163.5511.8 MS1248.0-0600 124802.7495.8724.905.1 MS1248.7+5706 124846.5493.9619.076.6 MS1251.0-0031 125101.7681.788.134.5 MS1251.5-0533 125131.9711.144.834.1 MS1252.4-0457 125225.9542.289.645.2 MS1253.6-0539 125336.4490.943.985.7 MS1253.9+0456 125356.4496.9626.285.0 MS1254.5+2209 125430.9492.6110.434.7 MS1254.8+0142 125452.0492.7713.835.4 MS1255.3+3529 125519.14821.34106.6910.2 MS1255.3+2200 125521.9572.138.524.1 MS1255.7+0147 125546.7522.4611.095.1 MS1256.3+0151 125619.2532.4611.065.0 MS1256.2+3833 125616.74820.84104.217.9 MS1258.4+6401 125824.5493.9617.726.3 MS1257.4+3439 125725.8532.6313.204.1 MS1304.0+3417 130403.8495.8930.006.0 MS1259.6+1238 125936.6488.0940.437.7 MS1306.1-0115 130608.6574.2318.754.1 MS1305.4+2941 130527.1482.9712.377.0 MS1308.8+3244 130852.049 3.6014.905.0 MS1306.7-0121 130643.84926.45*102.306.3 (1) (2)(3)(4) © American Astronomical Society • Provided by theNASA Astrophysics Data System Dec.(1950) Err +375843.5 0.69 +344051.0 0.49 -054824.5 1.08 -060052.5 1-15 +570613.9 0.60 -003125.5 0.40 -053322.7 0.28 -045711.9 0.44 -053949.5 0.16 +045615.4 1.39 +220949.5 0.56 +014224.6 0.51 +352948.5 2.09 +220053.6 0.52 +014752.2 0.48 +015107.6 0.49 +383317.6 2.64 +343922.2 0.64 +640106.2 0.63 +341755.0 0.98 +123834.3 1.05 -011524.7 1.03 +294143.9 0.42 -012123.3 4.20 +324404.7 0.72 (5) S/N (6) TABLE 3—Continued Net C 151.0 108.0 Err 23.1 62.0 33.2 12.8 52.2 33.5 (7) 40.4 52.3 10.1 29.8 11.8 67.5 31.2 41.4 24.1 10.6 37.6 22.4 33.4 52.6 65.6 5.7 21.7 43.4 66.3 34.6 65.2 8.7 43.0 7.9 6.5 7.5 9.9 5.9 7.6 6.6 5.9 5.5 8.3 7.3 8.3 5.2 7.2 8.6 6.9 9.4 6.9 6.9 596 Bkg C Time 25095 12093 25095 25095 2772 3485 12.9 6795 3485 12.0 5330 (8) 22.5 11.0 58.6 49.1 72.5 1905 4867 12.8 2605 4790 16.6 4867 10.2 4790 4790 16.4 3127 3531 14.1 1855 22.8 3183 4709 16.4 8009 9.1 1574 4212 1574 12.4 8.8 5.2 4.0 3.4 7.7 8.6 7.7 5.1 4.0 Ext C Seq n. 3980 4004 4004 (9) 7039 1.6E+20 4645 2.1E+20 4645 2.1E+20 4645 2.1E+20 5375 2.1E+20 2136 9156 2136 5717 2608 5990 9156 9156 529 3045 9701 1131 1.8E+20 5204 1.1E+20CL 1131 122 479 445 839 1.4E+20 119 1.4E+20 2.1E+20 1.3E+20 2.1E+20 1.3E+20 2.6E+20 1.7E+20 2.6E+20 1.1E+20 1.7E+20 2.2E+20 1.1E+20 1.7E+20 1.7E+20 BL 1.0E+20 1.0E+20 1.8E+20 CL (10) NH AGN Source AGN AGN STAR AGN AGN Class 1 AGN AGN CL AGN STAR AGN STAR AGN AGN STAR AGN AGN CL STAR (11) (12) 22 Id Comments 1 20 13 10 1 8 1 1 1 1 3 2 1 1 1 1 1 1 Hewitt andBurbidge HRI 8325,MSSl SAO 138983, 1987 MSS2 Gliese 490A-B SAO 119684 Hewitt andBurbidge, EXO skymap 12580108 1987 125936.2+123827 (8") 19 90ApJS. . .72. .5 67G MS1333.9+5500 MS1333.3+1725 MS1332.6-2935 MS1309.8+3600 MS1309.7+3221 MS1332.1+4138 MS1311.1+3210 MS1309.1+3208 MS1309.1-0523 MS1330.5-0811 MS1312.1+7314 MS1328.5+3135 MS1327.4+3209 MS1312.1-4221 Source Name MS1326.6+2546 MS1314.7+7257 MS1322.3+2925 MS1321.8-1036 MS1320.8-0430 MS1318.3+2854 MS1317.5-2134 MS1316.6-4229 MS1317.3-1213 MS1317.3+4309 MS1317.0-2111 (1) R.A.(1950) Dec.(1950) -052320.6 +320805.5 American Astronomical Society •Provided bythe NASA Astrophysics Data System -293524.5 +322135.6 +550022.2 +172511.1 +413817.1 +360058.2 +313500.1 +320903.9 +321043.9 +254654.1 +292532.5 +731453.3 -422125.1 -043054.9 +285406.3 -422919.3 +725726.1 -213418.9 -121354.3 -211130.1 +430950.1 -081102.5 -103629.6 130911.6 130906.0 133354.4 133323.3 133241.4 133206.2 130944.1 133033.7 132834.9 132726.9 130950.3 131106.1 132641.3 131209.0 132219.4 131210.2 131445.6 132149.5 132050.9 131640.4 131820.3 131734.3 131701.9 131721.8 131719.7 (2) Err 53 49 49 49 48 14.17 52 52 45 31.53 49 49 49 63 48 49 52 48 75 168.69 49 52 49 49 49 48 49 (3) 14.54 2.90 3.47 7.96 0.83 2.78 4.03 0.58 2.40 0.68 1.73 1.77 0.89 0.82 8.64 7.20 0.63 1.82 1.18 0.60 0.86 3.29 0.45 6.15 0.75 1.88 4.12 5.33 2.90 0.84 7.15 1.15 3.46 6.79 1.09 0.64 5.12 5.23 0.69 0.71 0.97 1.40 0.75 1.10 6.82 6.03 6.40 Err Fx (4) 110.53 17.8 512.92 11.6 39.25 15.43 32.06 20.15 5.9 43.20 10.5 70.40 35.80 6.1 20.11 4.8 11.57 11.93 33.94 21.64 31.91 13.91 16.42 4.4 24.31 24.37 34.11 14.15 15.46 18.06 15.66 ccr 9.53 (5) S/N (6) 4.6 4.2 5.0 7.8 4.4 6.9 4.0 5.9 4.2 8.5 4.9 5.0 4.5 4.3 5.4 9.0 6.2 6.8 TABLE 3—Continued Net C 326.3 121.8 135.6 Err 24.0 23.8 56.7 18.3 34.7 26.3 26.6 11.6 42.1 24.8 26.6 43.0 64.4 29.9 84.0 38.0 25.8 32.6 23.5 37.0 33.5 11.7 56.1 44.1 10.6 94.9 (7) 5.7 5.2 8.2 8.3 7.2 6.9 6.9 6.2 6.1 6.2 5.7 6.2 6.6 5.5 6.1 6.3 7.1 9.8 8.2 6.9 6.7 597 Bkg C Time 2673 5708 1272 4292 4212 4840 11.4 13.4 4081 13.3 6240 1976 1976 2716 10.4 13.2 2165 3756 4212 12.7 6216 6180 10.4 2000 3756 1054 11.9 4058 3038 3938 3938 5986 11.5 17.1 10.0 6141 11.9 (8) 3.0 8.2 9.7 4.6 4.9 8.9 5.0 7.9 7.5 5.9 1.4 7.2 6.5 Ext C Seq n. 10244 5376 1.7E+20Class1 3969 1.2E+20 5204 3930 9.1E+19 4260 5128 1.0E+20 5204 1.1E+20 3982 1.2E+20 2230 2.7E+20 6878 1.7E+20 6721 7.0E+20 9703 2.5E+20 8996 3120 8996 6878 1.7E+20 6722 8.9E+20 (9) 588 4.2E+20 549 235 1.1E+20 235 1.1E+20 917 2.4E+20 498 1.1E+20 525 1.2E+20 2.6E+20 1.1E+20 1.1E+20 3.1E+20 8.0E+20 8.0E+20 1.3E+20 (10) NH AGN AGN AGN AGN Source AGN AGN AGN AGN AGN STAR STAR AGN BL AGN AGN AGN AGN AGN STAR AGN AGN GAL STAR 15 13 27 (ID Id 2 1 1 1 1 1 8 1 1 1 1 1 1 1 1 1 1 1 1 EXO MSS1 SAC 63396 SAO 139405,EXO 133033.8-081110(25") 130908.8+320742(50") NGC 5084 HRI 4368 (12) 19 90ApJS. . .72. .5 67G MS1413.8+1400 MS1412.8+1320 MS1412.7+7140 MS1411.0-0310 MS1409.9-0255 MS1408.1+2617 MS1407.9+5954 MS1404.4+5502 MS1403.5+5439 MS1402.3+2627 MS1402.3+0416 MS1401.9+0437 MS1334.6+0351 MS1359.1+0430 MS1358.4+6245 MS1335.9-2918 MS1335.2-2928 MS1335.1-3128 MS1357.5-0227 MS1351.6+4005 MS1350.8+1810 MS1340.7+2859 MS1339.9+6030 MS1339.6+0519 MS1342.8+6016 Source Name (1) © American Astronomical Society • Provided by theNASA Astrophysics Data System +140049.4 +132025.0 +714019.9 -031010.2 -025506.6 +261727.5 +595400.8 +550249.0 +543931.0 R.A.(1950) +262715.6 +041622.3 +043721.4 Dec.(1950) +043055.9 -292840.7 +035139.1 -291831.2 +400525.1 +181038.6 +601627.8 +285916.8 +603024.0 +051955.1 -312855.7 1-62450 6.0 -022720.2 141351.3 141252.6 141242.7 141104.0 140958.9 140807.9 140754.0 140428.7 140330.4 140220.8 140219.7 133508.4 133438.1 133554.5 133516.5 140158.3 135906.5 135824.7 133954.2 133937.2 135731.1 135141.4 135050.2 134045.4 134251.2 (2) 53 52 49 53 Err Fx 54 49 46 19.83 49 49 53 48 49 53 50 48 12.59 49 13.82 54 56 56 49 49 48 (3) (4) 11.19 2.48 2.17 1.04 8.92 0.52 0.52 2.32 5.25 0.48 0.47 3.94 1.97 1.49 0.72 1.22 0.58 3.71 4.67 0.79 2.87 0.70 0.32 2.42 0.66 0.33 2.78 3.73 3.05 1.73 5.53 5.56 0.67 1.41 0.84 3.51 0.51 0.86 3.79 0.72 4.35 1.32 8.08 4.88 1.01 1.03 1.22 Err 41.09 8.6 24.12 11.43 10.83 4.2 89.53 13.3 22.72 19.69 5.5 17.22 4.7 47.03 16.0 52.84 52.60 20.15 4.2 27.82 23.99 21.77 12.29 41.58 12.55 10.85 15.22 13.90 16.30 7.10 8.34 7.28 (5) S/N (6) 4.8 4.1 4.9 4.3 8.0 5.4 5.7 8.9 8.7 5.4 5.5 5.6 4.6 8.0 4.0 4.4 4.2 6.0 TABLE 3—Continued 187.0 Net C 283.2 105.8 34.0 10.1 87.3 25.4 28.4 35.4 39.8 18.9 14.1 27.9 Err 75.0 27.7 17.7 46.5 88.1 35.4 22.2 40.4 23.9 35.7 24.0 37.6 44.8 12.2 71.1 18.3 (7) 7.1 6.1 6.9 7.3 4.7 7.1 5.9 9.4 8.7 5.4 5.7 5.4 7.3 7.1 7.4 6.4 9.8 6.2 8.9 4.7 6.6 598 Bkg C Time 12628 5354 5354 15.7 3784 16.0 11.6 18.6 3147 17.6 3369 6454 6454 1557 12.0 10.9 14.0 3133 29.8 28.5 6075 42.2 9795 3290 5708 5708 2669 3931 6093 9795 4378 12.6 13.8 1346 3931 10.2 1866 1739 12.7 1961 (8) 3.2 7.3 3.6 8.9 4.8 8.9 8.3 3.7 7.0 9.0 Ext C Seq n. 5143 1.5E+20 5143 1.5E+20 6885 2.1E+20 7204 7204 5381 8337 1.3E+20 2141 1.2E+20 5379 6883 3717 5547 3717 7061 8334 2.2E+20 2602 3.6E+20 5377 2.1E+20 3933 9.6E+19 7304 2.0E+20 1957 2.0E+20 6442 1.2E+20 (9) 588 4.2E+20 588 496 1.9E+20 496 1.9E+20 3.8E+20 Class1 3.8E+20 1.5E+20 1.6E+20 2.2E+20 2.0E+20 1.5E+20 2.2E+20 Class1 4.0E+20 4.2E+20 (10) NH AGN AGN STAR AGN Class 1 AGN AGN STAR AGN Class 1 AGN Source AGN AGN AGN AGN CL AGN STAR STAR STAR 22 10 12 (ID 1 1 1 1 5 1 Id 1 2 1 8 1 1 1 1 HRI 8312,EXO,MSSl 140219.6+041620 (8") SAO 100751,IRAS Hewitt andBurbidge, HRI 9725,MSS1 SA0181825, IRAS,EXO 7 Bootes 1987 133552.9-291823(20") Comments (12) 19 90ApJS. . .72. .5 67G MS1443.5+6349 MS1442.8+6344 MS1441.7+5208 MS1441.3+5222 MS1437.5+2829 MS1440.4+5213 MS1436.8-2628 MS1431.5+0526 MS1430.4+0527 MS1428.2+0732 MS1427.4+1034 MS1426.9+1052 MS1426.5+0130 MS1426.4+0158 MS1425.7+6320 MS1421.5+6321 MS1421.0+2955 MS1420.1+2956 MS1417.0+0345 MS1416.3-1257 MS1415.4+5640 MS1414.9+1337 MS1414.8-1247 MS1414.2+0140 MS1414.0+0130 Source Name (1) © American Astronomical Society • Provided by theNASA Astrophysics Data System R.A.(1950) +634901.5 Dec.(1950) +634441.4 +520827.4 +013049.6 +522214.8 -124710.8 +105235.1 +014024.6 +521325.2 +282926.7 -262848.1 +052725.8 +564038.2 +133717.0 +052658.2 +073254.0 +103406.4 +013033.1 +015833.5 +295633.7 +034526.0 +632034.4 +632143.5 +295542.1 -125701.5 144331.6 144252.4 144143.9 141405.5 144122.7 141413.4 144024.2 143731.5 141452.4 143028.5 142728.3 142658.0 141525.2 141457.5 143651.1 143135.7 142814.5 142632.6 142008.2 141703.1 141620.4 142626.3 142547.9 142130.8 142101.2 (2) Err Fx 53 46 15.97 54 52 55 51 48 50 48 50 54 45 53.01 49 49 49 49 46 53 53 54 45 58.78 49 48 49 48 (3) (4) 2.93 1.41 0.71 3.14 5.56 0.47 4.15 0.33 0.57 0.82 2.59 1.34 1.41 0.36 6.38 1.33 0.39 2.52 7.22 6.85 1.98 1.45 6.65 6.48 1.15 7.14 1.78 0.49 4.98 1.01 5.27 2.55 2.76 0.98 0.54 1.68 1.29 8.00* 0.42 0.83 4.20 8.96 1.74 0.64 0.62 7.16 0.69 Err 210.18 20.5 179.76 14.0 71.54 11.3 13.13 20.73 28.37 26.82 26.46 33.24 35.71 21.79 10.2 22.11 21.78 12.83 29.02 23.62 34.01 11.62 10.24 42.08 11.40 4.0 7.07 7.79 9.92 7.80 (5) S/N (6) 4.1 5.1 5.5 5.0 5.5 8.8 4.3 4.4 7.Í 4.6 4.3 4.3 6.2 7.9 8.2 8.6 4.7 4.1 9.1 1.1 TABLE 3—Continued Net C 139.6 202.8 128.5 428.4 Err 24.5 12.3 32.5 22.7 32.0 11.0 28.3 23.3 22.8 97.1 44.8 41.7 33.2 20.9 30.9 74.4 43.7 20.5 22.3 12.6 30.6 85.6 84.0 10.8 76.9 10.5 14.4 98.3 (7) 5.9 5.2 5.7 7.6 8.4 5.3 7.6 5.3 7.1 7.3 5.3 6.1 9.4 5.8 9.7 7.3 9.7 6.6 599 Bkg C Time 2836 2836 23.9 2052 12.4 10.5 25.5 2052 25.1 2038 5286 5286 2375 20.3 24.4 5354 6745 6745 13.6 31.5 22.8 3524 6745 1283 16.3 1909 17.1 3524 1745 18.7 13.1 9202 11.4 11.7 4902 9202 6740 6331 6198 6740 6331 (8) 5.1 3.8 5.1 4.3 8.6 4.9 7.7 4.2 6.3 Ext C Seq n. 10373 7818 5143 7818 6897 1.7E+20BL 6897 1.7E+20 3300 2.0E+20 5557 1.3E+20 5557 1.3E+20 2143 2.3E+20 6317 1.6E+20 6317 8468 1.8E+20 8468 1.8E+20 7608 4897 6.8E+20 7637 1.4E+20 6317 6361 2.4E+20 6361 2.4E+20 8440 1.7E+20 6443 7.2E+20 7608 8440 1.7E+20Class1 (9) 237 1.7E+20 872 139 2.8E+20 2.8E+20 2.7E+20 1.6E+20 2.7E+20 1.5E+20 6.8E+20 1.6E+20 (10) NH AGN AGN AGN AGN Source AGN AGN AGN AGN AGN AGN AGN AGN AGN AGN AGN AGN STAR STAR STAR STAR STAR 22 (ID Id 2 1 1 2 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 PG1416-12, var.,EXO MSS2 Mkn 1383,EXO SAO 29254 SAO 29248 SAO 182743 141621.2-125654 (8") 142633.6+013028 (8") Comments (12) 19 90ApJS. . .72. .5 67G MS1451.5+2139 MS1528.5+0844 MS1525.1+1551 MS1458.8+2249 MS1457.0+2226 MS1457.0+2108 MS1456.4+2147 MS1455.7+2121 MS1455.0+2232 MS1522.0+3003 MS1503.2+7406 MS1503.0+2606 MS1500.5+2552 MS1454.0+2233 Source Name MS1521.1+3027 MS1520.7-0625 MS1512.4+2551 MS1503.9-1634 MS1520.2+2548 MS1520.1+3002 MS1519.8-0633 MS1516.3+7203 MS1513.7+1948 MS1513.6+3358 MS1512.4+3647 (1) R.A.(1950) Dec. (1950) American Astronomical Society •Provided bythe NASA Astrophysics Data System +213945.9 +212152.0 +223328.3 +210818.9 +214756.3 +223230.7 +084458.8 +155117.5 +300329.1 +260642.4 +255224.8 +224943.2 +222603.0 +364735.7 -163453.4 +740613.0 +302750.9 -062547.9 -063349.6 +194831.2 +335855.5 +255119.4 +254814.4 +300238.7 H720352.8 145132.6 145404.0 145500.6 145849.1 145702.6 145701.0 145627.4 145545.1 152830.4 150303.1 150035.1 152509.1 152205.1 150314.9 151228.6 151228.2 150359.9 151340.7 152109.8 152046.7 152016.1 152009.2 151949.8 151620.8 151343.4 (2) Err Fx 49 57 45 29.88 49 46 12.61 49 49 46 10.50 46 11.76 49 49 49 14.12 51 53 49 48 84.28* 53 53 48 49 48 22.23 49 49 (3) (A) 10.46 2.86 2.02 0.57 2.01 2.43 2.25 0.46 2.31 0.50 4.73 0.49 1.27 1.19 1.45 8.53 3.37 2.05 0.55 0.35 1.10 7.37 0.97 1.49 2.61 5.07 3.18 3.77 0.52 9.16 0.58 3.62 3.91 8.12 0.79 1.10 1.26 0.79 0.80 0.36 1.45 1.13 6.81 Err 105.89 319.60 9.2 11.27 38.86 10.8 23.63 27.24 10.05 47.26 42.66 5.9 55.12 45.26 29.73 20.16 31.20 12.17 6.5 34.07 13.07 18.10 14/91 17.12 67.94 7.15 8.33 9.93 6.13 (5) S/N 20.1 (6) 5.0 4.1 4.4 5.1 4.4 9.9 9.9 5.4 6.4 9.5 6.1 4.5 4.6 7.0 4.8 4.6 6.7 4.9 4.0 7.2 TABLE 3—Continued Net C 422.6 109.6 103.0 111.9 128.6 Err 36.3 34.3 25.5 21.0 39.4 56.2 56.5 11.3 12.0 11.0 11.1 40.6 29.5 58.7 29.9 31.2 10.3 32.7 26.2 52.7 31.6 24.7 94.8 34.0 38.1 61.2 (7) 7.8 7.3 8.5 6.2 6.6 5.4 5.9 7.1 5.7 9.1 6.7 8.4 7.0 7.5 9.1 6.5 6.1 6.6 9.2 600 Bkg C Time 12348 7127 26.7 16.7 25.5 7149 13.5 15.1 18.4 6652 6652 20.5 5780 16.4 7149 17.4 6092 13.4 6092 6000 23.3 14.4 1367 3828 2058 9624 9624 1100 5566 2046 3458 5069 1380 11.4 5566 12.5 1779 15.0 44.8 11.3 1779 (8) 9697 4.6 5.1 4.4 5.8 4.3 4.3 3.3 9.7 Ext C Seq n. 10404 2.0E+20 10404 3586 3585 3585 3582 3582 3584 3583 3583 1907 3.5E+20 1907 7626 2.4E+20 7488 3973 1.5E+20 1909 3.8E+20 7308 7.5E+20 7683 1.6E+20 4061 7736 3.6E+20 1961 6.9E+20 1961 6.9E+20 6891 2.1E+20Class1 (9) 799 3.5E+20 797 2.8E+20 768 2.7E+20 3.1E+20 3.1E+20 3.3E+20 3.3E+20 3.0E+20 3.4E+20 3.5E+20 3.4E+20 2.0E+20 CL 3.8E+20 2.0E+20 (10) NH AGN AGN CL Source AGN BL AGN AGN AGN STAR STAR AGN AGN AGN STAR AGN AGN AGN CL STAR STAR STAR 28 (ID 13 Id 1 2 1 1 8 1 1 1 8 8 2 1 1 5 1 1 1 MSSl HRI 8314,MSSl MSSl, SAO121038 MSSl A2069, MSS2 SAO 140499,GXLibrae SAO 64673,Gliese584 SAO 83795,IRAS IRAS IRAS (12) 19 90ApJS. . .72. .5 67G MS1559.4+4122 MS1559.2-2232 MS1559.1+3324 MS1558.5+3321 MS1558.4-2232 MS1558.3+4138 MS1558.0+4123 MS1557.0-2212 MS1555.1+4522 MS1554.4-2345 MS1553.4-2339 MS1552.1+2020 MS1552.0-2338 MS1549.8+2022 MS1548.7+2009 MS1548.7+1125 MS1541.0-1101 MS1534.7+5448 MS1546.8+1132 MS1534.2+0148 MS1545.3+0305 MS1533.0+0919 MS1532.5+0130 MS1531.2+3118 MS1530.6+1342 Source Name (1) +412212.0 -223257.0 +332455.0 +332144.7 American Astronomical Society •Provided bythe NASA Astrophysics Data System -223220.1 +413851.3 +412334.5 -221231.8 +452232.7 +202033.8 -234553.6 -233916.1 -233829.0 -110104.2 +544815.6 +112515.5 +113214.7 +030518.8 +014800.7 +091908.4 +013054.6 R.A.(1950) +202256.5 +200936.1 +311844.0 Dec.(1950) +134254.5 155926.7 155913.2 155907.6 155830.3 155827.9 155820.3 155802.9 155702.4 155211.9 154104.4 153442.6 153415.2 153300.1 155506.1 155426.7 155329.6 155202.6 154949.4 154847.1 154845.3 154650.6 154523.0 153230.3 153117.8 153037.0 (2) 52 48 50 48 20.17* 49 49 54 52 53 Err 53 53 54 45 43.02 49 46 20.59 48 45 51.10 49 49 49 49 15.68* 49 13.69 (3) 13.66 0.25 1.00 8.03 2.91 1.27 0.71 2.35 0.86 4.92 0.29 0.40 1.47 1.80 0.76 3.48 1.10 4.51 2.43 2.49 2.21 0.41 5.77 3.91 3.90 5.52 2.80 1.79 0.34 0.95 0.95 0.55 2.11 0.79 7.15 0.79 1.22 1.96 1.13 1.25 1.08 1.26 6.67 6.73 Err Fx (4) 255.48 154.39 40.14 12.03 74.94 24.61 21.36 17.39 28.83 23.04 21.23 12.15 35.75 27.58 49.04 58.52 10.39 19.48 70.44 10.5 68.46 4.88 4.0 6.96 8.76 8.94 7.33 (5) 17.3 40.9 12.6 S/N (6) 4.1 6.3 8.6 5.7 5.0 4.5 4.6 4.1 4.4 7.2 5.3 5.5 7.3 4.1 4.1 5.6 4.9 4.0 9.1 6.5 TABLE 3—Continued 1707.9 307.5 Net C 175.1 120.9 30.6 45.3 22.7 78.8 39.1 43.5 34.3 26.8 21.5 32.4 23.9 71.4 34.4 22.7 Err 10.1 41.8 39.5 29.2 23.5 17.8 13.9 10.1 63.2 11.5 40.7 48.0 92.0 (7) 7.8 5.6 7.2 9.3 6.9 8.9 7.7 5.8 5.2 7.3 8.7 5.5 5.9 7.1 6.6 6.2 6.2 7.3 7.5 601 11126 11126 Bkg C Time 30.1 2754 4881 4881 2754 35.6 8911 24.7 2754 21.5 5285 1530 31.0 36.1 3186 3186 5457 5285 5285 4263 5361 9716 11.8 11.5 13.6 12.1 4875 2253 9716 16.9 10.0 1678 1539 15.8 4875 9716 15.1 (8) 8.3 6.7 8.2 7.9 7.4 5.5 8.6 7.3 5.8 9.7 6.0 Ext C Seq n. 10549 1.4E+20 5997 6832 1.2E+20Class1 4264 4264 5997 6835 5997 1.1E+21 6832 3039 1.4E+20 5936 1.1E+21 5936 1.1E+21 5397 6.1E+20 5708 4.6E+20 5936 1.1E+21 5708 4.6E+20 9022 1.1E+21 7642 (9) 200 524 3.6E+20 371 3.9E+20 524 3.6E+20 214 371 3.9E+20 808 3.5E+20 371 3.9E+20 804 3.3E+20 2.3E+20 1.1E+21 2.3E+20 1.1E+21 1.4E+20 1.2E+20 2.2E+20 (10) NH AGN STAR CL AGN STAR AGN AGN STAR AGN AGN BL CL AGN STAR CL STAR STAR STAR STAR STAR STAR STAR Source 25 (ID 1 1 1 1 1 1 1 2 1 1 1 1 8 1 8 9 1 Id A2145 MSSl A20 92 HRI 8318,MSSl,var. SAO 29588 HD 142361,var. HRI 9727,MSSl HRI 6335 (12) 19 90ApJS. . .72. .5 67G MS1640.1+5349 MS1640.0+3940 MS1635.0+2651 MS1634.7+2638 MS1633.1+2643 MS1628.5+2140 MS1623.4+2712 MS1621.5+2640 MS1618.9+2552 MS1617.9+1731 MS1617.1+3237 MS1601.1+4119 MS1614.9+3052 MS1613.0+3053 MS1611.8-0323 MS1610.4+6616 MS1603.6+2600 MS1601.9+4125 MS1600.5+4038 MS1614.9+3114 MS1614.1+3239 MS1613.3+3105 MS1559.8+4202 MS1613.6+3055 MS1559.7+1753 Source Name (1) © American Astronomical Society • Provided by theNASA Astrophysics Data System +534951.9 +394057.2 +265124.4 +263810.5 +264349.6 +214055.7 +271219.4 +264042.9 +255258.7 R.A.(1950) +173133.7 -032349.4 +412501.9 +403837.6 +420231.6 Dec.(1950) +311415.3 +661621.4 +260007.5 +411953.6 +323719.8 +305321.3 +175322.1 +305245.8 +323932.4 +305503.8 +310547.1 164007.0 164005.5 163502.4 163445.2 163306.2 162833.3 162329.1 162132.4 161858.1 161028.6 160107.3 160030.3 161756.5 161708.1 161150.9 160341.6 160154.4 155951.1 161457.5 161455.2 161406.8 161321.8 161301.5 155947.3 161338.2 (2) 50 49 45 53 45 11.58 53 46 49 Err Fx 49 54 54 50 54 49 49 48 11.40 49 48 49 46 49 49 48 60 (3) (4) 4 21.. 13 0.40 3.02 0.80 4.39 0.30 4.87 0.46 0.23 0.98 0.73 3.71 0.73 7.78 1.84 9.74* 1.84 2.40 2.34 7.91 2.03 3.42 0.51 2.14 2.73 2.14 2.78 0.53 0.31 0.25 0.52 0.37 0.22 0.26 0.23 1.14 1.65 1.27 1.14 0.31 1.23 0.29 0.56 0.28 1.04 6.16 1.58 1.66 Err 22.15 24.35 16.3 15.10 7.5 57.89 25.0 28.89 12.88 33.98 27.18 56.99 6.9 73.43 8.8 17.29 5.4 17.11 11.67 11.32 3.56 5.70 ccr 4.25 7.71 8.74 9.03 6.15 7.50 8.29 5.4 8.73 6.15 (5) 10.6 S/N (6) 5.5 4.3 5.1 5.3 4.3 4.6 4.0 5.7 4.4 4.1 7.3 4.9 4.6 4.3 8.2 6.6 9.8 TABLE 3—Continued 302.3 665.2 130.9 Net C 130.8 74.2 38.1 18.6 26.6 36.1 35.4 12.4 40.9 51.0 Err 26.1 31.0 31.5 39.0 19.5 82.6 55.9 37.1 29.5 51.0 33.8 40.7 76.6 10.4 11.7 13.3 62.9 95.5 (7) 9.9 6.9 8.5 6.9 7.7 4.7 7.4 8.4 7.1 7.7 8.8 6.9 9.5 6.9 9.4 7.1 6.5 9.7 9.6 602 18539 18539 18539 Bkg C Time 11126 11126 11126 17072 16484 16484 16484 16484 16484 23.8 8386 3280 43.7 41.8 35.9 22.1 12.6 4105 7854 7854 17.8 5948 2112 28.5 27.1 3261 32.0 1540 39.1 36.3 18.6 8911 1755 32.4 18.5 40.7 15.9 6412 40.5 47.2 15.8 6412 (8) 9.9 2.6 4.0 6.4 9.9 Ext C Seq n. 5694 8351 2.5E+20 8349 8349 8349 5584 5720 5720 3177 3.7E+20 5581 3548 4607 4.5E+20 3713 3.4E+20 3548 6832 1.2E+20Class1 6832 1.2E+20Class2 3548 3548 6832 1.2E+20 6835 1.4E+20 3548 6319 6319 (9) 117 272 2.9E+20Class1 484 3.6E+20 1.0E+20 3.6E+20 3.6E+20 Class1 4.3E+20 3.4E+20 3.4E+20 CL 2.4E+20 Class1 2.0E+20 2.4E+20 4.3E+20 2.4E+20 2.4E+20 2.0E+20 2.4E+20 9.3E+20 (10) NH AGN STAR STAR AGN STAR AGN CL AGN AGN CL AGN STAR CVorX-raybinary AGN AGN STAR AGN AGN STAR Source STAR 22 30 31 (ID 5 2 2 1 1 3 2 8 1 2 1 Id 1 1 1 1 SAO 84487 SAO 84485 B2 1623+27A A2177 MSS2 HRI 10651,EXO,MSSl 161756.0+173132(25") Comments (12) 19 90ApJS. . .72. .5 67G MS1736.0+6504 MS1727.8+5159 MS1719.4+2650 MS1719.4+3239 MS1718.6+4902 MS1717.8+2632 MS1710.8+1624 MS1709.6+4823 MS1709.1+5432 MS1706.2+6038 MS1705.5+5443 MS1704.9+6046 MS1704.6+6053 MS1701.7+4914 MS1701.5+6102 MS1657.1+3524 MS1703.2+6049 MS1703.2+6100 MS1704.3+5432 MS1703.7+2417 MS1703.5+6052 MS1654.4-0415 MS1653.9+3515 MS1644.1-0258 MS1640.5+6224 Source Name (1) American Astronomical Society •Provided bythe NASA Astrophysics Data System +650442.1 +515923.9 +265043.6 +323916.1 +490242.9 R.A.(1950) +263256.4 Dec.(1950) +162450.0 +482302.1 +622410.1 +543258.9 +351537.8 -025831.2 +610259.7 +352433.4 +603858.0 +544341.8 +604613.4 +605359.2 +605208.4 +610030.2 +491418.2 +543221.2 +604915.9 +241702.6 -041549.1 173605.4 172748.7 171929.6 171925.3 171841.4 171753.4 171052.1 164035.6 170938.1 165425.9 165359.3 164410.6 165707.8 170911.8 170616.0 170146.5 170133.9 170531.4 170456.6 170312.5 170437.2 170418.0 170317.7 170343.1 170332.0 (2) 52 53 12.25 49 49 49 Err 49 53 53 51 52 52 52 46 27.39 49 53 51 49 49 48 23.23 46 48 (3) 4 32.74 2.40 5.06 7.67 1.50 0.80 0.52 2.24 0.85 4.23 5.67 1.97 0.86 1.48 5.86 5.46 1.17 3.36 6.83 0.13 2.47 0.78 0.98 0.59 5.54 0.34 1.77 0.24 3.32 0.25 1.11 4.89 2.15 0.98 0.76 3.91 0.26 1.11 0.13 0.55 0.15 0.14 0.15 0.83 0.78 8.29 1.13 Err Fx (4) 163.72 16.6 136.96 116.14 38.35 5.1 25.28 6.3 46.39 17.32 17.75 28.33 29.30 27.31 5.6 22.44 20.16 28.70 10.6 16.53 13.65 8.41 2.93 ccr 2.26 8.84 4.96 9.48 3.14 4.05 4.66 7.4 (5) S/N 20.1 11.1 10.8 13.0 (6) 5.1 5.0 4.3 6.6 4.6 5.0 4.5 5.0 5.2 4.3 5.0 4.4 4.1 4.7 6.8 TABLE 3—Continued 282.4 Net C 528.2 237.8 128.6 109.2 122.8 125.6 126.8 29.5 30.4 46.9 30.8 31.5 17.1 52.3 26.8 Err 32.8 58.5 28.8 36.7 13.1 32.3 26.3 37.4 43.7 59.1 26.5 11.5 72.3 18.3 14.5 17.0 16.0 14.4 11.4 12.0 (7) 5.7 7.4 6.0 6.8 6.3 5.7 7.9 6.3 8.4 5.8 8.7 6.9 6.6 6.4 603 Bkg C 38085 112.5 Time 38085 38085 12267 161.8 38085 38085 38085 12267 151.9 38085 163.5 144.0 133.7 2944 1078 1467 5615 2644 15.0 2944 10.9 4637 2284 1955 2284 26.3 8711 3154 2244 19.2 37.2 1540 2284 97.2 8188 16.2 (8) 5.6 3.5 8.1 8.5 8.6 5.1 7.2 8.7 4.4 6.3 7.4 6.1 Ext C Seq n. 3812 8594 3091 4.0E+20 4951 2.4E+20 3091 4.0E+20 9017 3.3E+20 7846 6.3E+20 7885 2.3E+20 2494 9.2E+20 7663 2.5E+20 5688 7397 1.7E+20 5688 2.3E+20 7663 5688 2.3E+20 5688 2.3E+20Class1 5688 2.3E+20 5688 2.3E+20Class1 7397 1.7E+20 6451 1.0E+21 5688 2.3E+20 7666 2.1E+20 7663 2.5E+20 9972 4.4E+20 (9) 273 2.8E+20 3.5E+20 3.2E+20 2.3E+20 2.5E+20 (10) NH AGN AGN STAR AGN STAR AGN STAR AGN AGN STAR Class 2 AGN AGN STAR Source BL AGN AGN STAR STAR AGN AGN AGN STAR 22 15 21 12 (11) 1 1 1 1 1 1 1 1 2 2 1 Id 1 1 2 1 1 1 1 ROSS 867,HRI7627, IRAS SAO 30274,IRAS SAO 30275and LHS 3255 SAO 17187,IRAS HRI 4494.var. HRI 4207 HRI 4207 SAO 30239,MuDra IRAS Comments (12) 19 90ApJS. . .72. .5 67G MS1739.8+6712 MS1737.2+6847 MS1745.2+2747 Source Name MS1846.5-7857 MS1844.7+7949 MS1830.8+4717 MS1839.5+8002 MS1837.8+4538 MS1746.2+6738 MS1826.5+7256 MS1818.7+6740 MS1810.3+6940 MS1807.8+7846 MS1751.0+7046 MS1747.2+6837 MS1753.5+1830 MS1806.5+6939 MS1806.0+6944 MS1754.9+6803 MS1754.5+7017 MS1804.8-6556 MS1804.3+6753 MS1803.6+6738 MS1758.9+2339 MS1757.7+7034 (1) R.A.(1950) American Astronomical Society •Provided bythe NASA Astrophysics Data System Dec. (1950) +684709.9 +671244.6 -785712.6 +800248.3 +673803.8 +274749.8 +794937.0 +453812.9 +471722.2 +725632.2 +674013.8 +694014.4 +784611.6 +693944.1 +704618.5 +683724.6 -655641.4 +694451.4 +675326.0 +673811.1 +680357.6 +701729.4 +183019.3 +233946.9 +703402.8 173715.8 174516.7 173949.8 174615.8 174716.2 184635.7 184446.9 183935.5 183749.8 183048.6 175333.2 175102.7 182632.8 181842.7 181022.0 180751.2 180633.2 180603.4 180452.1 180423.7 175745.5 175458.7 175430.8 180339.8 175855.6 (2) Err Fx 53 48 18.64 49 52 49 21.94 49 13.14 55 49 12.43 45 56 84 46 49 49 11.74 50 53 52 10.17 49 11.13 49 48 14.67 46 33.81 48 48 23.44 (3) (4) 25.38 18.42 1.61 3.30 7.95 2.48 3.60 2.48 2.39 2.40 2.05 0.50 1.85 0.17 0.48 0.54 4.14 0.83 7.80 0.90 0.41 7.81 4.68 2.18 2.29 1.02 0.26 2.19 2.70 2.16 3.26 1.08 0.19 1.38 0.36 2.82 0.76 1.67 1.27 9.13 Err 126.88 114.47 12.5 27.77 37.67 5.3 23.39 93.20 38.99 39.56 38.29 39.05 11.21 12.38 76.49 11.45 43.27 38.09 63.27 80.24 33.66 16.28 45.66 ccr 4.13 3.61 8.34 6.89 (5) S/N 11.6 19.0 16.3 11.1 (6) 4.3 5.2 5.3 4.0 4.6 4.9 4.9 4.6 6.6 5.1 4.1 7.2 4.3 9.0 8.3 6.7 4.7 7.2 4.7 TABLE 3—Continued Net C 142.2 303.4 412.3 127.7 168.0 Err 25.4 58.3 12.2 31.1 27.8 31.3 53.6 22.0 28.4 21.7 27.0 22.7 85.5 30.3 11.0 50.5 25.2 30.4 18.6 11.3 46.8 33.0 11.5 13.1 59.4 74.1 93.4 13.4 (7) 5.7 5.8 5.9 5.7 8.7 5.8 5.9 5.8 5.8 5.4 5.3 9.5 7.5 7.0 8.9 6.0 8.1 604 Bkg C Time 18885 18885 19709 19709 19709 2543 7905 1500 2018 17.5 2447 2119 1068 5968 2022 57.7 1418 42.6 4131 1597 66.4 12.0 1068 79.5 77.9 2133 3417 1490 1914 16.0 7125 1490 1068 (8) 12.0 7.8 2.9 7.7 3.7 3.7 5.5 7.3 4.7 7.0 5.6 5.4 4.3 3.8 5.9 6.5 6.5 Ext C Seq n. 7888 4.1E+20 8803 4.3E+20 4422 2630 8804 5690 5690 5689 5121 7152 8.6E+20 5193 4952 7.2E+20 8657 5.4E+20 5689 5689 5213 8884 5129 8884 4.6E+20 8757 4265 4.7E+20 8780 (9) 889 843 426 4.7E+20 4.3E+20 5.9E+20 5.0E+20 4.3E+20 4.5E+20 5.8E+20 4.4E+20 4.0E+20 5.0E+20 5.0E+20 4.6E+20 4.4E+20 6.1E+20 7.8E+20 4.6E+20 CL 4.7E+20 8.8E+20 (10) NH AGN Source AGN STAR AGN AGN AGN STAR AGN AGN AGN STAR STAR STAR STAR Class 1 AGN STAR STAR AGN STAR STAR STAR 10 13 13 (ID 2 Id 8 1 1 8 1 1 1 2 1 1 1 1 1 7 1 1 1 MSS1 Omega Dra SAO 17576,IRAS position 1.7'SW EXO FK Comaetype ESO 025-G02 OU 462 HRI 4362,IRAS SAO 47576 SAO 17800,var.,EXO HRI 8326,MSSl, var., LP25-2,EXO SAO 103221 181022.8+694013(35") 180745.2+784533(25") Hewitt andBurbidge, 183936.5+800249(25") 1987 Comments (12) 19 90ApJS. . .72. .5 67G MS2113.8+0455 211348.949 2.537.854.1 MS2113.3+0517 211323.6492.3911.965.3 MS2053.7-0449 205344.6532.739.164.3 MS2053.2-0503 205315.3487.8826.468.6 MS2045.3+7523 204523.4473.0015.008.7 MS2044.1+7532 204406.7492.366.155.2 MS2039.5-0107 203931.8493.5310.916.4 MS2038.3-0046 203820.2458.9144.5317.9 MS2037.3-0035 203721.2492.216.824.6 MS2034.8+7532 203452.6491.376.866.7 MS2034.5-2253 203434.8497.6227.404.9 MS2017.3-1441 201720.5534.4914.844.3 MS2007.8-3622 200753.5416.3751.628.6 MS1955.9-3516 195558.7487.0321.507.7 MS1916.5+6735 191631.6591.236.154.1 MS1912.5+6719 191230.1522.718.535.5 MS1907.8-6406 190750.3491.875.915.4 MS1910.5+6736 191032.3468.8227.7012.7 MS1907.0-6405 190700.9463.0215.1011.7 MS1906.8-6339 190650.1491.417.046.3 MS1906.5-6421 190633.3522.307.295.5 MS1903.9-6353 190357.8481.354.264.8 MS1849.2+7953 184914.4482.7013.5010.6 MS1849.2-7832 184914.1497.4821.45 MS1846.9+7947 184658.5491.494.975.6 Source Name (1) © American Astronomical Society • Provided by theNASA Astrophysics Data System +045500.3 0.62 +051709.2 0.45 -044916.7 0.63 -050310.8 0.92 +752337.3 0.34 +753223.1 0.45 -010744.1 0.55 -004625.5 0.50 -003519.5 0.48 +753234.0 0.20 -225315.9 1.56 -144121.5 1.04 -362205.4 1.90 -351606.0 0.91 +673546.7 0.30 +671909.2 0.49 R.A.(1950) +673624.5 0.69 -640658.1 0.35 Dec.(1950) -640513.6 0.26 -633957.8 0.22 -642133.8 0.42 -635313.1 0.28 +795303.1 0.25 -783203.0 1.78 +794700.0 0.27 (2) Err (3) Fx Err (4) ccr (5) S/N (6) 4.2 TABLE 3—Continued 349.7 Net C 194.4 184.7 155.5 29.4 41.2 28.1 85.4 10.9 44.8 94.7 60.5 19.6 39.9 29.4 10.2 67.9 24.4 82.0 72.9 53.0 30.9 Err 15.3 11.5 58.6 61.9 15.8 74.8 12.0 11.0 12.1 14.6 18.7 60.7 11.9 66.4 7.2 (7) 7.8 6.6 9.9 8.5 9.3 8.5 605 5.8 5.7 9.5 9.4 7.9 9.7 4.7 16504 16504 15601 15601 15601 16504 Bkg C 10854 10854 20546 10854 20546 20546 Time 20546 20546 18885 18885 22.6 5743 5743 19.8 14.9 23.3 4949 4949 28.2 13.4 26.2 33.3 33.1 36.1 1717 3178 2330 5153 16.1 32.0 42.0 39.6 71.1 59.3 58.5 66.3 68.2 88.4 1418 75.6 (8) 4.7 8.6 9.0 3.3 Ext C Seq n. 5645 6.5E+20 5645 7416 7416 3365 3365 8415 8415 6.6E+20 8415 6.6E+20 3365 8390 5638 3115 3289 5626 5626 5626 6.2E+20 7063 6.1E+20Class1 7063 6.1E+20 7063 6.1E+20 7063 5690 7152 8.6E+20 5690 4.4E+20 7063 (9) 6.5E+20 4.9E+20 Class1 4.9E+20 1.2E+21 1.2E+21 6.6E+20 3.8E+20 5.2E+20 1.2E+21 6.1E+20 6.8E+20 6.2E+20 6.2E+20 4.4E+20 6.1E+20 6.1E+20 (10) NH AGN STAR AGN Class 1 AGN STAR AGN STAR AGN STAR Class 1 AGN AGN AGN STAR AGN Class 1 Class 1 GAL STAR STAR Source STAR 25 24 (ID 1 2 2 1 1 1 2 1 1 1 1 1 1 1 Id 1 1 SAO 9870 HD 197010 error circle also SAO9812in HRI 4392 MSS1 SAO 9256 Comments (12) 19 90ApJS. . .72. .5 67G MS2159.5-5649 MS2157.6-1016 MS2116.6-1042 MS2154.5+0107 MS2118.4-1050 MS2148.2+1420 MS2144.9-2012 MS2134.0+0018 MS2128.3+0349 MS2125.9-1456 MS2125.5-1503 MS2124.7-2206 MS2119.7+1655 Source Name MS2144.2+0358 MS2137.3-2353 MS2136.1-1509 MS2136.0-2307 MS2134.0+0028 MS2143.4+0704 MS2143.2+1429 MS2143.2+1424 MS2142.7+0330 MS2141.2+1730 MS2140.6+1432 MS2134.1-1518 (1) © American Astronomical Society • Provided by theNASA Astrophysics Data System R.A.(1950) Dec.(1950) -564956.7 -104216.7 -105054.6 -101659.9 -145639.1 -220652.4 +165532.1 +010724.4 -150929.4 +002823.8 +001810.3 +034933.0 +142042.6 -201205.8 +173003.1 +143244.5 -235304.6 +035858.1 +070414.9 +033040.0 -150311.8 -230707.9 -151845.1 1-142933.1 1-142421.6 211640.3 215930.7 211827.2 215737.9 212822.6 212554.3 212531.5 212443.4 211943.8 215435.0 213608.9 213600.5 213407.5 213405.3 213401.2 214816.3 214457.8 214314.1 214243.1 214113.6 214036.4 213722.0 214416.5 214324.8 214316.6 (2) Err Fx 50 53 53 13.45* 49 52 54 53 53 39 55 49 48 18.37 52 22.17 50 46 24.05 48 55 52 49 21.78 48 49 49 49 (3) (4) 2.60 2.32 3.06 0.62 2.70 2.06 0.28 1.13 2.19 2.73 2.92 0.41 0.52 3.29 5.72 2.13 2.23 2.98 0.37 0.33 0.19 0.85 0.33 1.37 0.55 3.01 0.52 7.76 0.71 4.42 8.67 1.57 0.47 4.62 0.42 0.33 0.44 8.94 0.30 1.80 1.38 1.08 1.93 1.40 1.91 Err 26.20 28.27 30.05 79.58 46.61 21.93 75.08 91.86 6.0 74.76 15.09 16.43 10.66 ccr 5.67 5.51 7.98 9.45 4.2 5.82 4.27 6.87 6.93 6.84 6.98 9.34 6.31 9.70 (5) S/N (6) 5.7 4.1 5.3 4.2 5.3 4.3 8.9 4.5 4.6 4.2 4.3 6.0 4.1 4.8 4.5 4.0 4.6 7.3 6.3 6.2 6.4 6.2 6.8 TABLE 3—Continued Net C Err 29.4 28.5 52.0 30.8 27.0 37.8 59.4 28.3 53.3 34.9 83.5 35.4 28.2 24.8 22.4 46.8 35.4 33.1 58.9 34.6 57.1 45.2 43.6 16.9 61.7 (7) 7.4 5.9 7.1 7.9 5.2 8.7 7.4 8.0 6.6 9.1 6.3 7.3 5.2 8.5 9.4 9.6 6.7 4.5 7.5 7.8 6.6 7.7 6.9 9.2 9.1 606 Bkg C Time 11729 11729 12049 12049 12902 12902 11618 10314 10314 11618 10314 24.2 21.4 27.7 31.0 21.7 28.8 32.6 4494 15.7 4688 2018 3053 8529 1581 6304 2325 21.4 2018 27.8 1026 17.0 26.0 26.1 20.3 4600 6968 19.8 1557 1574 (8) 2.2 4.5 8.1 8.2 2.2 3.9 4.6 8.6 3.0 9.4 Ext C Seq n. 7329 4.5E+20 7329 4.5E+20Class1 5652 2.6E+20 5648 5426 7799 5.2E+20 5426 4.6E+20Class1 7801 4.4E+20 3958 5.4E+20Class1 5130 7181 6.5E+20 3958 4445 7605 7.0E+20 7803 3.0E+20 7605 7.0E+20 7605 7.0E+20 (9) 504 6.8E+20 543 4.1E+20 528 5.1E+20 528 5.1E+20 242 6.1E+20 131 3.6E+20 177 698 3.6E+20 698 3.6E+20 68 52 3.5E+20 CL 4.6E+20 5.4E+20 8.0E+20 4.8E+20 BL (10) NH Source AGN AGN AGN STAR AGN AGN STAR STAR GAL AGN AGN AGN AGN AGN CL CL STAR STAR STAR STAR (ID 2 Id 2 3 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 PHL 1668 PKS 2134+004,HRI MSS2 MSS2 OX 169,HRI568,EXO 214113.8+173008 (8") 10372, Hew&Bur'87 Comments (12) 19 90ApJS. . .72. .5 67G MS2255.7+2039 MS2255.0-3651 MS2254.9-3712 MS2254.5+0209 MS2254.2+0219 MS2222.5+2114 MS2216.0-0401 MS2215.7-0404 MS2254.1+0712 MS2222.9+2046 MS2247.8-0703 MS2232.6-3743 MS2225.7-2100 MS2224.1+2056 MS2223.8-0503 MS2223.6-0517 MS2223.0+2110 MS2215.2-0347 MS2253.8+2036 MS2252.2+1126 MS2248.7-0727 MS2210.2+1827 MS2209.8+1800 MS2204.0-4059 MS2159.5-5713 Source Name (1) +203935.9 -365124.6 American Astronomical Society •Provided bythe NASA Astrophysics Data System -371210.7 +020939.2 +021934.3 -040100.8 R.A.(1950) +071231.0 +211449.7 -040443.8 -034732.1 Dec.(1950) +203623.9 -072706.1 -070331.6 -374324.4 -210052.6 -050348.5 -051752.3 +204640.6 +182726.1 +180009.2 +112658.7 +205627.7 +211009.2 -405916.9 -571352.4 225542.1 225501.7 225454.0 225435.7 225417.7 221605.9 225411.4 225349.0 222255.3 222231.4 221544.5 221514.4 221013.3 220951.6 220403.1 225213.9 224845.2 224751.5 222545.8 222407.5 222352.3 222340.6 222300.7 215931.5 223236.0 (2) 49 52 48 24.55 46 46 Err 46 49 48 11.49 53 52 52 52 30.51* 53 11.40 48 49 49 49 49 40.41* 48 14.92 49 15.50 49 49 49 47 11.53 (3) 11.49 3.24 0.58 2.40 0.59 2.12 0.73 8.59 5.39 0.43 1.03 0.53 9.03 4.43 2.38 2.19 1.77 0.90 3.82 3.95 3.50 0.87 0.78 3.44 2.07 2.48 7.18 0.73 7.00 0.25 1.09 0.79 0.41 1.77 0.44 0.73 4.33 0.97 1.67 6.41 6.93 1.09 Err Fx (4) 119.60 129.12 10.58 5.6 11.70 28.15 11.7 26.96 12.6 29.62 8.8 22.13 38.05 26.17 34.04 13.92 11.85 52.25 54.72 11.8 13.58 12.05 14.91 48.17 38.42 45.90 10.6 97.48 5.83 5.43 7.83 ccr (5) 11.6 S/N (6) 4.1 8.4 5.2 5.4 8.0 5.0 5.0 6.5 4.2 4.4 4.3 4.4 4.8 4.4 6.3 7.5 6.8 4.6 TABLE 3—Continued 142.0 155.1 180.1 Net C 152.5 129.1 44.9 25.0 12.2 13.3 14.3 86.3 83.7 10.0 45.4 37.6 32.1 26.3 Err 73.9 36.5 31.0 31.6 24.4 31.6 45.3 26.5 18.6 45.4 49.8 60.7 12.9 12.2 (7) 8.0 6.1 9.8 7.0 5.9 5.4 7.1 9.3 4.6 8.4 7.4 8.5 7.1 5.5 6.6 6.3 7.4 8.1 6.3 607 10064 10064 Bkg C Time 11735 19.1 3277 6960 12.0 3277 21.9 24.9 5206 2291 16.2 5008 5008 3847 6960 33.8 3847 24.7 26.6 3847 3847 12.1 12.1 8656 11.4 1122 8656 1792 1792 1792 1766 1766 14.5 4459 4688 18.9 (8) 7.7 9.7 3.6 2.4 5.7 8.7 5.2 7.8 5.3 8.4 4.4 3.4 Ext C Seq n. 7961 5.0E+20CL 6674 6674 4024 5.3E+20 4024 5.3E+20 7729 2073 5.1E+20 7961 5131 4.5E+20 2068 5131 4.5E+20 5131 4.5E+20 5131 4.5E+20 2068 2068 7751 3.6E+20 7751 4646 5.3E+20Class1 4646 5.3E+20 8438 4.8E+20 8438 4.8E+20 3722 1.3E+20 5652 2.6E+20 1872 6951 (9) 172 113 1.2E+20 1.2E+20 5.3E+20 5.0E+20 5.6E+20 5.6E+20 5.6E+20 3.6E+20 2.7E+20 1.2E+20 (10) NH AGN AGN AGN AGN STAR AGN AGN AGN AGN AGN CL AGN AGN STAR AGN AGN AGN AGN CL AGN AGN AGN STAR Source 12 (ID 1 1 1 1 1 2 1 1 1 1 3 1 1 8 1 1 1 1 1 1 Id 9 MSS1 are related,sameCL HRI 8327,MSS1 Zwicky galaxy,IRAS This sourceandnext IRAS, MSS2 Comments (12) 19 90ApJS. . .72. .5 67G MS2347.4+1924 MS2346.8+1842 MS2342.7-1531 MS2340.9-1511 MS2338.9-1206 MS2336.5+0517 MS2335.2+0305 MS2332.4+0119 MS2318.9-4210 MS2318.7-2328 MS2329.3-3827 MS2318.2-4220 MS2317.7-4202 MS2316.9+0019 MS2316.3-4222 MS2315.1-3640 MS2311.2-4259 MS2310.9-4948 MS2310.4-4949 MS2307.9-4328 MS2306.1-2236 MS2304.1-4418 MS2302.8-2319 MS2302.4-4427 MS2301.3+1506 Source Name (1) American Astronomical Society •Provided bythe NASA Astrophysics Data System +184226.5 +192454.8 -153129.8 +051726.7 +030546.1 +011910.1 -422002.9 +001951.8 -420247.6 -422257.4 -432830.4 R.A. (1950) -223606.4 -231924.1 +150627.8 Dec. (1950) -151158.1 -120605.0 -382746.8 -421011.8 -232836.1 -364058.3 -425956.8 -494800.6 -441839.1 -442745.9 -494936.6 234246.2 234054.7 233516.3 234728.1 234652.9 233858.1 233633.6 233227.5 232920.7 231854.0 231847.6 231815.3 231747.0 231658.5 231623.0 231509.2 231112.9 231056.3 231027.4 230609.4 230406.7 230758.3 230251.1 230227.0 230118.1 (2) 53 11.05 50 48 49 49 46 37.62* 53 52 49 49 49 49 48 66.05* 49 50 45 39.46* 54 45 193.56* 48 52 Err Fx 45 22.82 49 49 48 49 (3) (4) 16.35 10.46 2.80 2.17 1.02 1.28 2.10 3.08 8.04 1.17 0.70 0.93 4.79 4.93 4.65 0.49 4.18 0.75 8.81 2.85 0.38 0.35 1.18 5.42 1.54 4.43 1.45 0.94 4.68 1.40 0.45 1.03 0.35 4.16 1.41 4.52 0.80 4.10 0.84 3.71 5.53 1.34 0.72 6.58 Err 254.05 7.5 143.03 8.5 151.53 25.6 740.35 18.5 16.63 4.7 20.68 4.2 10.83 4.0 20.92 8.5 55.23 5.1 40.21 6.3 14.57 5.0 14.23 4.1 68.56 7.8 12.46 7.6 20.79 4.6 23.39 5.0 20.78 9.2 19.35 4.4 17.81 5.1 27.66 7.7 21.06 4.9 96.30 16.2 15.80 4.4 5.58 4.2 ccr S/N 6.27 4.0 (5) (6) TABLE 3—Continued 271.0 347.1 102.1 Net C 685.4 24.0 31.7 22.1 42.5 31.5 10.3 31.2 22.4 87.6 59.7 76.2 29.2 24.6 26.7 28.0 65.1 10.2 78.0 18.8 11.2 25.5 Err 31.1 16.8 34.9 24.2 28.5 73.2 (7) 5.4 5.5 6.8 8.4 5.4 6.6 6.2 8.0 5.7 6.0 8.9 7.5 5.4 7.5 5.7 5.6 5.8 6.8 9.3 608 Bkg C Time 2089 11.7 5642 2086 2089 3701 18.4 5974 2614 2540 1771 3460 1899 27.0 26.3 29.6 2057 2540 1947 25.1 22.6 7271 2390 10.0 10.7 2737 13.9 2472 9768 7271 4578 4023 9768 9768 4023 (8) 3.5 5.2 7.5 4.9 7.9 4.7 3.8 5.1 4.3 5.9 6.5 4.3 7.5 5.5 6.8 Ext C Seq n. 2294 2.2E+20 2294 2.2E+20 1982 4.1E+20 1915 3.0E+20 5666 6.3E+20 1875 6367 4.3E+20BL 7730 5.4E+20 4043 4.9E+20 5259 4892 1.5E+20 5159 1.7E+20Class1 5159 1.7E+20 5742 1.9E+20 5742 1.9E+20 1120 7569 1.7E+20 5660 5.6E+20CL 6218 6385 1.9E+20 4292 2.1E+20Class1 4293 2.1E+20 6385 1.9E+20 6719 3.0E+20 6385 (9) 185 161 721 435 2.0E+20Class1 2.0E+20 1.8E+20 CL 1.9E+20 1.9E+20 (10) NH AGN BL AGN STAR AGN AGN AGN AGN AGN STAR CL STAR STAR STAR STAR Source 13 13 22 (11) 1 1 2 1 1 3 1 1 1 1 1 Id Gliese 900 A2580 SAO 128293 PKS 2329-384,Hewitt EXO and Burbidge,1987 ESO 347-9,A3998 MSS2 ESO 347-7 PKS 2316-423,MSS2 234052.8-151227(40») Sllll Sersl59-03,S1101,EXO 231111.4-430007 (8») SAO 231427 Comments (12) 19 90ApJS. . .72. .5 67G = — 132 z =0.22(northeast). is identifiedwithanAGNatasimilarredshift.However,therearegalaxies visibleintheareaofAGNwhichcouldcontributetoemission. both SeyfertsprobablycontributetoX-rayemission. counterpart. Westilldonothaveapositiveidentification,andclassifyitasclass1onthebasisofcorrectedf/ratio. [log(/x//o) 0.7]reportedintheirTable5wasincorrectlycomputedbecauseofatypographicalerrorthefluxcolumn 2(Gioiaetal. contribute totheextendedappearanceofX-raymorphology. 1984). Thecorrectfluxshouldread11.7X10"ergscm"s".ThisleadstoanX-ray-to-visualratiotoohighfortheMstar to betheoptical the X-rayemission. xv MS 0339.8—2124.—Ambiguousidentification;alsoSAOstarattheedgeoferrorcircle. MS 1248.0—0600.—Compositesource: twoAGNsatdifferentredshiftsandaclusterofgalaxiesthe sameredshiftasoneoftheAGNs. MS 1229.2+6430.—Sourceatthe edge ofthedetector.Possiblyextended. MS 1207.9+3945.—Originallyidentified asanAGNbydeRuiter,Willis,andArp1977;laterrevised byStockeetal.1985tobeaBLLacobject. MS 1136.7+2852.—LooseclusterinCCD;earlyMstaralsopresent andbrightenoughtobealternateidentification. MS 1019.0+5139.—NatureofAGNunclear;morespectroscopyrequired. MS 0919.3+5133.—Possiblyextended. MS 0906.3+1111,0906.5+1110.—AnX-rayisointensitycontour mapisshowninFig.5.Theeasternsourceaclusterofgalaxies;thewesternone MS 0830.3+2828.—Twostarsintheerrorcircle(G4VandF6V)both couldcontributetotheX-rayemission. MS 0537.1—2834.—ThissourcewastentativelyidentifiedwithadMe starinStockeetal.1983. MS 0536.3—2849.—ThissourcewastentativelyidentifiedwithaGal/Cl inStockeetal.1983. MS 0451.6—0305.—Ambiguousidentification;galaxiesarealsopresent intheerrorcircle.Morespectroscopyisrequired. MS 0451.5+0250.—X-rayemissionfromanunmaskedIPCimageisveryextendedandcouldencompasstwoclustercentersatz=0.20(southwest) and MS 0401.6+2150.—dMepair. MS 1145.1+0033.—Closetotheedge oftheIPC;X-rayIPCpositionisnotaccurate.SeeEXOSAT CMAposition. MS 1108.3+3530.—ClosetotheedgeofIPC.Possiblyextended. MS 0922.9+7459.—Clusterofgalaxies(Abell786)alsopresentinthe errorcircle. MS 0850.8+1401.—OldMSSidentificationwithanSAOstarisnow ruledoutbytherevisedX-rayposition. MS 0809.9+4809.—Staralsopresentintheerrorcircle. MS 0357.7—2340.—TwoSeyfertgalaxiesatthesameredshift.BaseduponananomalouslyhighvalueofX-ray-to-opticalfluxratiofor thissource, MS 0317.7-6647.—ThissourcewastentativelyidentifiedwithanMstarinGioiaetai1984.However,thelogarithmofX-ray-to-visual fluxratio MS 0257.9+3429.—ThissourceidentifiedwithaBLLacobjectisattheedgeofIPCfieldandclosetoribs.Possiblyextended. MS 0255.3+2018.—Ambiguousidentification;AGNalsopresentintheerrorcircle. MS 0114.5—0140.—AlthoughtheproposedcounterpartisanAGN,otherobjectscouldberesponsibleforasmallpartofX-ray emissionand MS 0013.4+1558.—ThisisacompositesourcedescribedbyGioiaetal.1984.Twobrightstars(GandMe)arealsopresentwhichlikely contributeto MS 0241.6+1045.—TwoMstarsintheerrorcircle;bothcouldcontributetoX-rayemission. MS 0159.1+0330.—ThisisacompositesourcewhichhasbeenextensivelydiscussedinGioiaetal1984(seeNotestoTable2oftheirpaper). MS 0037.8+2917.—Astarburstgalaxyisalsopresentinthefield.ItscontributiontoX-rayflux,evaluatedfromvalueoff/ , isnegligible. xv MS2357.4-3520 MS2356.9-3434 MS2354.4-3502 MS2357.5-6352 MS2356.1-6358 MS2348.6+1956 MS2353.9+0714 MS2349.8-0112 MS2348.3+3250 MS2348.0+2913 Source NameR.A.(1950)ErrFxccrS/NNetCTimeSeqn.NHId (1) (2)(3)(4)(5)(6)(7)(8)(9)(10)(11) © American Astronomical Society • Provided by theNASA Astrophysics Data System +071410.0 +325046.7 Dec. (1950)ErrBkgCExtSource -635222.3 -352017.4 -635849.8 -350215.6 +195654.2 +291314.4 -011255.6 -343459.8 235727.1 235656.6 235732.4 235606.4 235425.8 235358.7 234950.8 234840.8 234821.6 234802.3 53 50 51 53 70 152.11* 49 49 12.28 46 49 16.63 33.07 2.23 2.06 1.64 5.17 1.04 5.12 1.80 0.49 1.17 0.97 3.87 2.87 0.54 0.76 7.38 6.31 626.90 4.6 11.08 4.1 21.69 4.4 25.58 4.9 21.92 8.3 23.65 4.1 51.54 7.5 12.75 4.0 54.25 5.8 8.48 4.2 Notes toTable3 TABLE 3—Continued 24.3 28.1 26.2 26.3 32.4 21.2 10.1 84.3 20.2 35.3 63.0 8.3 5.7 5.3 5.5 4.9 6.0 6.6 6.8 6.2 609 2021 5642 11.7 5967 16.2 5967 2021 13.4 5967 2417 1762 18.7 1606 1631 5.7 3.8 3.8 3.7 6.0 6.8 2952 2.2E+20 2952 2.2E+20 2651 5.2E+20 5387 2.5E+20 1593 1 3043 5.0E+20 4268 1.1E+20 4268 1.1E+20 4268 1.1E+20CL 8408 5.8E+20 6367 4.3E+20 AGN AGN AGN AGN AGN CL AGN STAR 15 2 1 1 3 1 1 PKS2354-35,A4059,EXO MSS2 HRI 3166 235428.6-350226(15") (12) 19 90ApJS. . .72. .5 67G 1 -21 56 12 7 been applied.FortheextragalacticpopulationX-ray constant conversionfactorof1IPCcounts~=2xl0~ ing, andpointresponsefunctionscattering(see§II&). ergs cmscorrespondingtoaRaymond-Smiththermal net countshavebeencorrectedforvignetting,mirrorscatter- ranges (seealsoFleming1988foradiscussionoffluxestimate results innearlyidenticalconversionfactorstothosederived RS CVnandKMflarestarsusuallyhaveasecond spectrum withtemperaturesintherange8X10to3K absorption. Forstarsandclass2objectswehaveadopteda flux listedhasbeencorrected(“dereddened”)forGalactic (Ratio offirstlinetosecond =S/Nincol.[6].) detection cell.Nocorrection hasbeenappliedtothecounts. [source counts/(sourcecounts+background)^]. of X-ray-selectedstars). from theRaymond-Smithmodelsoverthesetemperature and nocorrectionforthehydrogencolumndensity.Notethat associated error(secondline),computedfromphotonstatis- temperature componentintherange(1-2)XlOK,which tics asthesquarerootoftotalobservedcountsin the tion inseconds(firstline); the LIVEtimeisequalto 610 proposed byHelfandandCaillault1982,aSAOstartotheeast,whichiswelloutsideX-rayerrorcircle. propose nowabinaryK4starastheopticalcounterpart. New opticalobservationssupporttheidentificationofthissourceasanAGN. Johnson 1985. circle. X-ray centroidwhichappearsnormalintheblue(3500-6500A).Furtherspectroscopyrequired. of galaxies. (22) Flemingetal.1988;(23)Margon(24)HelfandandCaillault1982;(25)Bergoffen(26)FeigelsonKriss1981; (27)Stocke (11) Wolstencroftetal.1983;(12)Chanan,Margon,andDownes1981;(13)Caillaultetal.1986;(14)Kriss1982;(15)Reichert (16)Margon POSS, suggestingthatapossibledistantclusterofgalaxiesispresentaswell.Morespectroscopicdataareneeded. etal. 1986;(17)Morris1987;(18)Biermannetal.1985;(19)Stocke(20)Katgert,Thuan,andWindhorst1983;(21)Chanan etal.1982; etal. 1987;(28)Schild1980;(29)Elvis1981;(30)Johnson1983;(31)Morris1990;(32)Nesci1989. and Chanan1985;(6)Gioiaetal.1986;(7)PravdoMarshall1984;(8)Maccacaro1982;(9)Stocke1983;(10)Kriss Cañizares1982; the IPCfield,whichmakesdeterminationofanexactsourcecentroidextremelydifficult.TheEXOSATCMApositionisgivenincol.(12). than theX-raycentroid,isusedherebecausesourceveryextended(seeGioiaetal.1987foranisointensitycontourmap)and neartheedgeof 3-1 Column (5).—Correctedcountrate(inunitsof10~s) ; Column (8).—Exposure(LIVE) timeoftheIPCobserva- Column (7).—Netcountsin0.2-3.5keV(firstline)and Column (6).—Signal-to-noiseratio(S/N)computedas MS 1256.2+3833.—Twostarsarepresent.Easternstariscataloguedasskymap12580108;westernSAO63275. MS 1532.5+0130.—AGNalsopresent.BoththeclusterandAGNcouldcontributetoX-rayemission. MS 1426.5+0130.—Possiblyextended. MS 1357.5-0227.—Staralsopresentintheerrorcircle. MS 1559.8+4202.—AlternateidentificationhasbeenproposedbyFleming,Gioia,andMaccacaro1989aastheG9starpresentinX-rayerror MS 1559.2-2232.—TheopticalcounterparttothissourceisaK5star(F.Walter1988,privatecommunication),differentfromtheidentification MS 1533.0+0919.—IdentifiedinStockeetal.1983asaG5SAOstar.Giventheimprovedpositionalaccuracy,wehavereobservedthisfield,and MS 2134.0+0018.—Thissourcewastentativelyidentifiedwithamid-KstarinGioiaetal.1984.ThefallsoutsidetherevisedX-rayerrorcircle. MS 1844.7+7949.—Twostarspresentintheerrorcircle(oneisSAO9230).BothcouldcontributetoX-rayemission. MS 1717.8+2632.—ThissourceisresolvedbyanHRIobservationandidentifiedwithapairofdMEstars,Gliese669A669B;seeHarris MS 1621.5+2640.—Compositesource.AlsopresentintheerrorcirclearetwoMstarsandaGOstarwhichmaycontributetoX-rayemission. MS 2143.4+0704.—SourceattheedgeofIPC.Possiblyextended. MS 2215.7—0404,2216.0-0401.—Thesearefoundastwoseparatesourcesbythedetectionalgorithm,buttheyassociatedwithsamecluster MS 2148.2+1420.—Faintgalaxywithdetectedradioemissionalsopresentintheerrorcircle. MS 2134.1—1518.—SourceattheedgeofIPC.Possiblyextended. References.—(1) Thispaper;(2)Fleming,Gioia,andMaccacaro1989a;(3)Gioiaetal.1984;(4)White,Silk,Henry1981;(5)Margon, Downes, MS 2354.4—3502.—Thepositiongiveninthetablecorrespondstoopticalcoordinatesofbrightestgalaxycluster.Thisposition, rather MS 2346.8+1842.—TwoMstarsarepresentintheerrorcircle.BothcouldcontributetoX-rayemission. MS 2306.1-2236.—ThissourceisclassifiedasGalacticbecauseofaK2starintheerrorcircle;possibleX-rayemitter.Agalaxyalsopresent nearthe MS 2255.7+2039.—Ambiguousidentification.Flemingetal.1988suggestanMstarastheidentification;however,faintgalaxiesarevisiblein © American Astronomical Society • Provided by theNASA Astrophysics Data System Notes toTable3—Continued GIOIA ETAL. galaxy), CL=clusterofgalaxies,BLLacobject,GAL of Starketal.(1989).Forregionsskynotsurveyed by fine). Thesecondfinefiststhenetextendedcountswhere column andinthereferences tothetable.Referencesother other authors’workasindicated inthesecondfineof cations comefromeitherour ownspectroscopicworkorfrom galactic object,Class2=probable Galacticobject.Identifi- are used:AGN=activegalacticnucleus(quasarorSeyfert and Cleary(1979)Cleary,Heiles,Haslam(1979). sight totheIPCfieldtargetdeterminedusingHisurvey Background countshavebeencomputedwithinthissamearea counts havebeencomputedmanuallywithinaregioncen- § Hb). dead time.Thesecondlinefiststhebackgroundcounts(see the X-raysource(firstfine).Thefollowingidentificationcodes Stark etal.(ô<—42°)wehaveusedthesurveysofHeiles from thebackgroundmapproducedbyREVIprocessing. as tocontainallthecountsbelongingsourceitself. appropriate. ForsourcesresolvedbytheIPCobserved actual timespentonthesource,correctedforinstrumental tered onthesourceandwithasizeevaluatedcasebyso = “normal”galaxy,STARstar,Class1probableextra- Column (10).—Hydrogencolumndensityalongthefineof Column (9).—IPCsequencenumberoftheimageused(first Column (11).—Proposedidentificationorclassificationof Vol. 72 19 90ApJS. . .72. .5 67G 1 individual sourceshavetoberemoved.Suchaprocess be- not run.Onerequirementin theselectionofIPCimages were run(see§II¿7).TheREVO system(onwhichtheMSS cases thebackgroundmapis not generatedandMDETECTis comes uncertainwhenintensediffuseemissionorbright for thesurveywasthatallof thethreedetectionalgorithms ( >0.6countss“)unresolvedsourcesarepresent.Inthese generated foreachIPCfield.Theyareusedtodescribe the accurate descriptionoftheimagebackground,countsfrom and astrophysical.Inorderforthebackgroundmaptobe an spatial distributionoftheIPCbackground,bothinstrumental processing systemsandreferthereadertoHamdenetal detection algorithmslightlydifferentfromtheoneusedin redetected. Asdiscussedin§II,theREVIprocessingusesa mon withtheMSS.Howevernotallofthemhavebeen (1984) foranextensivediscussionoftheIPCdataanalysis MSS. Wementionherethemaindifferencesbetweentwo original Medium-SensitivitySurvey,wehavesourcesincom- 0451.6+0250, Abell520),MS0735.6+7421(2E0735.6+7421), 0904.5+1651 (Abell744)inKurtzetal.(1985);MS0037.8+ maps ofthefollowingsourceshavebeenpresented:MS been publishedandarenotshownhere.Wereferthereader published aspartoftheMSSsamplesarelabelledMSS1 position isreportedunderthiscolumntogetherwiththe system. (1987); MS1111.8-3754(IE1111.9-3754)inMaccagnietal 2917 (2E0037.8+2917,Abell77),MS0451.5+0250 positional accuracyinparentheses.EMSSsourcesalready X-ray variablesource,IRASEXOSATandso have beenobtainedbyus. published evenifadditionalspectroscopicobservationsmay No. 3,1990 (1989). (1988); MS0839.8+2938(IE0839.9+2938)inNescietal 2580), MS2354.5-3502(2E2354.4-3502)inGioiaetal 2216.0-0401), MS2318.7-2328(2E2318.7-2328,Abell MS 2215.7-0404(2E2215.7-0404),2216.0-0401, MS 0620.6-5239(IE0620.6-5240)inGioiaetal.(1984); EMSS sourceswithresolvedX-raystructurehavealready most ofthem.Thecontourmapshavebeenobtainedby et al1984). (Maccacaro etal.1982;Stockeal1983)andMSS2(Gioia on). WhenasourceisdetectedbytheEXOSATCMA,this mation onthesource(i.e.,radiocatalogedsource,SAOname, 1558 (IE0013.4+1558),MS0159.1+03300159.1+0330), 1522.0+3003 (Abell2069)inGioiaetal.(1982);MS0013.4+ to thepaperslistedhereafterwhereisointensityX-raycontour Gaussian. Thefirstcontouris3aabovethebackground; sources asnotedinthecaptiontofigure.Anumberof successive contoursareinstepsof1a,exceptforstronger smoothing therawdata,binnedin16"X16"cells,witha32" the IPC.Figure5presentsisointensityX-raycontoursfor authors aregivenwhentheproposedidentificationhasbeen 1. IntheREVIprocessingsystembackgroundmapsare As mentionedabove,anumberofsourcesareresolvedby Since wehavereanalyzedIPCfieldspreviouslyusedinthe Column (12).—Comments:containsmiscellaneousinfor- b) ComparisonbetweenEMSSandMSSSources © American Astronomical Society • Provided by theNASA Astrophysics Data System EINSTEIN EXTENDEDMEDIUM-SENSITIVITYSURVEY AGNs. AlmostalloftheAGNs haveopticalspectraqualita- boundaries isslightlydifferent. with fixednominalenergyboundaries.Thisintroducesa was based)usedanaveragebackgroundforallthesourcesin image beingcharacterizedbydifferentexposuretimesinthe REVO system(MSS)areslightlydifferentfromthecounts reduced belowthethresholdforacceptance. correspondence betweenchannelboundariesandenergy Furthermore, asaresultoftherevisionincalibration, assigned tothesamesourceinREVIsystem(EMSS). further differencebetweenMSSandEMSSsources.Counts observed pulseheights(PH)havebeenconvertedtoPIbins of theIPC“gain”withtimeandacrossdetector.The two processingsystems.OntheaverageREVIexposure assigned toagivensourceinenergybandthe the REVIprocessingsystemtocompensateforvariation the image,regardlessoftheirpositionindetector. been assignedacode(RECO=ribandedgecode)which shorter. InthesecasestheS/Nforsourcesmaybe small numberofcasesthenewexposuretimeissignificantly time islongerthantheREVOexposuretime.However,ina identifications. Table4liststheMSSsourceswhicharenot parameters ofthesesources(position,significancedetec- images inwhichtheyweredetectedhavebeendiscarded(see 4; fourhaveRECO>1).Elevenmoredonotappear,sincethe uncertainty. June, 761of835sourceshavebeenidentified.Ofthese, 395 why thesourceisnotinEMSS. present intheEMSS.Column(1)listsMSSsamples The improvedpositionalaccuracyoftheREVIprocessing Table 4).Thisleaves92MSSsourcesintheEMSS.Thebasic EMSS, sincetheirfluxestimateisaffectedbysignificant takes intoaccounttheshadowingstatusofeachdetected Lac objectsorcandidates,13are“normal”galaxies,and 220 column (3)givestheidentification,and(4)explains reasons discussedabove.In12casestheMSSproposediden- MSS havenotbeenredetectedintheEMSS(fiveS/N< source. SourceswithaRECO>larenotincludedinthe are Galacticstars. associated andidentifiedwiththesamecluster),34are BL are AGNs,98clustersofgalaxies(twoX-raysources are of astronomicalobjectsarefoundinthesurvey.As1989 and additionalopticalworkhasledtotherevisionof10MSS than onepossibleopticalcandidateintheX-rayerrorcircle. source belongsto,column(2)givesthenameofsource, tification wasambiguousbecauseofthepresencemore tion, countrate,andsoon)areslightlydifferentforthe We haveclassifiedquasars, QSOs, andSeyfertgalaxiesas 2. Pulse-height-invariant(PI)binshavebeenintroducedin 3. Differentscreeningofthedatahasresultedinsame 4. SourcesfoundclosetotheribsoredgeofIPChave As canbeseenfromcolumn(11)ofTable3,manyclasses For theaforementionedreasonsninesourcespresentin V. OPTICALCOMPOSITIONOFTHEEMSS a) ActiveGalacticNuclei 611 19 90ApJS. . .72. .5 67G plotted. Thefirstcontouris3aabove thebackground;successivecontoursareinstepsof1aexceptfor thefollowingsources:MS0002.8—1556(3,5,7,9, a; MS1136.5+3413(3,5,7,9,12, 15,19,23)a;MS2318.9-4210(3,4,5,6,7,9,11,13)a. 11, 13)a;MS0508.8-4523(3,5, 7, 9,11)a;MS0624.3-5519(3,4,5,9)0906.5+1110 7, 9,11,13)a;MS0955.7-2635(3,5, Fig. 5.—IsointensityX-raycontour mapsforsomeresolvedsources.Pleasenotethatnon-EMSSsources withinthefieldofvieweachmaparenot ÜJ O o H Q Z Z -53°20 < -53°30 © American Astronomical Society • Provided by theNASA Astrophysics Data System MS 0320.9-5322 hmS 032l0 RIGHT ASCENSION O IRC EDGE hmS 0320 612 RIGHT ASCENSION RIGHT ASCENSION 19 90ApJS. . .72. .5 67G © American Astronomical Society • Provided by theNASA Astrophysics Data System Fig. 5—Continued 613 hmSrn 09063 0600 RIGHT ASCENSION 19 90ApJS. . .72. .5 67G © American Astronomical Society • Provided by theNASA Astrophysics Data System Fig. 5—Continued 614 19 90ApJS. . .72. .5 67G 1 AGNs inoursamplewhoseopticalspectraaretypical of has beendetected.Weexpect thattheremainderofthese AGNs. Forfiveoftheseunusualobjects(e.g.,MS0007.1- values fortheseobjectsarecomparabletothoseoftheother permitted emissionlinesarepresent.However,inabout 20 i.e., strong(W>50À),broad(FWHM1000km s“) with [Om]»ii].ButtheX-rayluminositiesand a or onlynarrow,forbiddenemissionlinesofoxygentypically unusual AGNswillalsopossess broad-lineregionsdetectable redward of6000Ahavebeen obtainedandstrong,broadHa 0231; A.Filippenko1986, private communication)spectra cases ourblue(3400-6000A)spectrashoweithernoemission only atHawithextremelylarge Balmerdecrements,andso tively similartothoseofAGNsdiscoveredbyothermeans; xX ox © American Astronomical Society • Provided by theNASA Astrophysics Data System RIGHT ASCENSION MSS 1IE0834.7+6512StarImagediscarded(largeoverlap MSS 2IE0334.2+0025StarImagediscarded(MDETECTnotrun) MSS 1IE0126.4+0725ClusterS/N<4(REVItime37%shorter) MSS 2IE0015.1+1603StarSourceobscured(RECO>1) MSS 1IE1415.0+2513AGNImagediscarded(MDETECTnotrun) MSS 2IE1137.5+6555AGNS/N<4 MSS 1IE0938.3+1151StarS/N<4 MSS 1IE0439.3-1102ClusterS/N<4(REVItime40%shorter) MSS 2IE2349.9+1951StarSourceobscured(RECO>1) MSS 1IE2141.6+0359AGNSourceobscured(RECO>1) MSS 2IE2124.8-1459AGNSourceobscured(RECO>1) MSS 2IE1614.8+0533AGNImagediscarded(MDETECTnotrun) MSS 2IE1604.8+1552AGNImagediscarded(MDETECTnotrun) MSS 2IE1553.6+1558AGNImagediscarded(MDETECTnotrun) MSS 1IE1533.5+1440AGNImagediscarded(extendedemission) MSS 2IE1439.8-0520AGNS/N<4 MSS 1IE1416.7+2524AGNImagediscarded(MDETECTnotrun) MSS 1IE1416.2+2525ClusterImagediscarded(MDETECTnotrun) MSS 1IE1415.1+2527AGNImagediscarded(MDETECTnotrun) MSS 1IE1240.8+0311StarImagediscarded(MDETECTnotrun) Sample NameIdentificationReason (1) (2)(3)(4) EINSTEIN EXTENDEDMEDIUM-SENSITIVITYSURVEY Sources inMSS1andMSS2NotPresentEMSS Fig. 5—Continued TABLE 4 we haveclassifiedthemasAGNsinTable3.Redspec- troscopy isinprogress. images necessary. Abell clusters,sothatmostoftheseclusterswerepreviously under thiscategory.Ofthe98EMSSclusters,only17 are optical imagesdeeperthan the POSSareneededtoassess unknown andthereforelack morphological andrichnessclas- their richness.Weareinthe processofobtainingtheCCD sifications. Insomecasestheir distanceissuch(z>0.2)that We haveclassifiedbothrichandpoorclusterstogether with anotherimage) b) ClustersofGalaxies 615 19 90ApJS. . .72. .5 67G 42-1 41- 616 range fromB8tolateMand includeasizablenumberofRS and Maccacaro19896).Five cataclysmicvariables(including early Bstarsarefound,and onlyafewpre-main-sequence coronal emissionfromlate-typemain-sequencestars.Since nucleus contributingtotheX-rayluminosityashasbeen ity lessthanthelimitssuggestedbyFabbianoaredeciding CVn andWUMabinaries and candidates(Fleming,Gioia, (0833+652 inMargonetal.1988)areclassifiedbyus as X-ray sourcesassociatedwithverybrightgalaxies,theab- limits suggestedbyFabbiano(1989);e.g.,MS0116.3-0115 whose X-rayemissionisclearlyextendedintheIPC,evenif halo withtotalluminosity<10ergss.Wehaveclassified biano 1989forareviewof“normal”galaxyX-rayemission). stars arepresent.Thespectral typesofthestellardetections the EMSSisrestrictedtohigh Galacticlatitudes,noOand found inM81(ShuderandOsterbrock1981;Elvis Van factors inclassifyingthemas“normal”galaxies.Thisclassi- (IE 0116.3—0116inMaccagnietal.1987).Forunresolved Notes toTable3,theextensionistentative,sinceallthree “normal.” Speybroeck 1982).StarburstgalaxieslikeMS0834.0+6517 fication doesnotprecludethepresenceofaveryweakactive sence ofbroadHaemissionopticallyandanX-rayluminos- elliptical galaxiestheX-rayemissionisduetoahot,gaseous due toacollectionofbinaryX-raysources,supemovae,and emission isnotdueprimarilytoanactivenucleus(seeFab- galaxy, thestrengthofbreakismuchlessthantypical but, asdiscussedin§IV(intheexplanationofcol.[4])and their totalX-rayluminosityissomewhatgreaterthanthe as “normal”galaxiesverynearby,brightspiralsandellipticals stellar coronaetotaling<10ergss.Forthe“normal” For “normal”spiralgalaxiestheX-rayemissionisprobably radio-quiet BLLacobjects.InretrospectallEMSS radio emissionwasappliedtoallowforthepossibilityof ratio isnotyetsufficienttoapplycriterion2atgreaterthan objects have5GHzradiofluxes>1mly(Stockeetal. objects and12arecandidates;thecandidateshaveoptical flux (4000À—)]/flux(4000Â+)<25%. for aclusterellipticalgalaxy,ensuringthepresenceof Ca ilHandK“break”isvisiblebecauseoftheunderlying emission fineswithequivalentwidth>5Aand(b),ifa dates, andwebasethisclassificationonthefollowingcriteria: 1990b). the 3aconfidencelevel.Originallynocriterionfordetectable spectra whicharefeaturelessbutforthesignal-to-noise substantial nonthermalcomponent;i.e.,[flux(4000A+)— sources havebeendetectedattheedgeofIPCfield. that therearethreeextendedBLLacobjectsinthesurvey The X-rayemissionfromthestarsinsurveyismostly By “normal”galaxieswemeanthosewhoseX-ray 2. Featurelessopticalspectrum,bywhichwemean(a)no We classify34EMSSsourcesasBLLacobjectsorcandi- Of the34BLLacobjectsinthissample,22arefirm 1. X-rayemissionpointlikeintheIPCobservation.Note © American Astronomical Society • Provided by theNASA Astrophysics Data System c) BLLacertaeObjects d) “Normal”Galaxies e) Stars GIOIA ETAL. 142 142 12 12 have thenbeensummedsoas tocreatethecumulativedistri- has beenobtainedbyweighting thecontributionofeach could havebeendetected.The contributionsfromeachsource X-ray sources,brighterthan f=7X10”ergscm“s”in bution shown.Theresulting surfacedensityofextragalactic source withtheareaofsky in whichthesourcequestion item 4in§IVu). fisted inTable3havebeencalculatedusingeitherextended We cautionthereaderthatthisskycoverageisnotappropri- like clustersofgalaxiesor“normal”galaxies,forcomputa- hypotheses asforthesourcefluxes(i.e.,apowerlaw with by aconversionfactorappropriateforpower-lawspectrum counts, whenappropriate,and/ordifferentassumptions (see energy indexa=1.0andthehydrogencolumndensityalong with anenergyindexofa=1.0andthemeasured the fineofsighttoeachIPCfieldcenter),isgiveninTable 5. galaxies andnormalthefluxesusedaredifferentfrom tion oflogA/-logSforstars.Thefluxestheseobjects ate forcomputationoflogN(>5')-logSresolvedsources, those fistedinTable3. rates fistedincolumn(5)ofTable3havethusbeenmultiplied the targetofIPCfield.Thusincaseclusters Galactic hydrogencolumndensityalongthefineofsightto necessary tofoldthesourcefluxescorrectlywithsky not becompleteatsuchahighfluxlevel,sincemostofthe cluded intheanalysis.Asdiscussed§IIuand116,wemay also madetheassumptionthatallextragalacticsources algorithm. IncomputingthelogV(>S)-log£curvewehave coverage ofthesurveyproducedusingstandarddetection of thepresenceextendedcounts.Thisrequirementwas counts measuredinthedetectioncell(see§II6),independent range 7x10“to1X10”ergscm“s“(0.3-3.5keV),the low endofthefluxdistributionasshowninFigure6.Forthis incomplete, andtheunidentifiedsourcesareclusteredat are describedbythesamespectrum.Thecorrectedcount the logV(>S')-logS'curveisfluxobtainedfrom tions withtheEinsteinObservatory.Thefluxusedtoderive “bright” X-raysourceswerechosenastargetsoftheobserva- to orgreaterthan10”ergscm”s“havenotbeenin- 10“ ergscm”s“,sothatthefivesourceswithfluxequal as suchorwereclassified“class1”(seeTable3). sources. Thesourceswereeitherspectroscopicallyidentified given areaofsky.Wehaveusedatotal605extragalactic number ofextragalacticsourcesexpectedinasurvey caro etal.1989forthesurfacedensityofEMSSBLLac of thedifferentclassesobjectsseparately(butseeMacca- binary (Morrisetal.1990)arealsopresent. sources, whichcanbeusedtodetermine,forfluxesinthe objects computedusingaflux-limitedsubsample).Wehave reason wearenotinapositiontostudythelogV(>*S')-logS determination ofthenumber-fluxrelationshipforX-ray thus updatedthelogV(>S)-\ogScurveofextragalactic sources. Asof1989Junetheidentificationsourcesis two AMHercufissystems),onewhitedwarf,andX-ray x The observedlogAT(>S)-log£isshowninFigure7. It The skycoverageofthesurvey,producedundersame The EMSSlogV(>S^-logShasbeentruncatedatlx The muchlargerEMSSsampleallowsustoupdatethe VI. THEEXTRAGALACTIClogN(>S)-logS Vol. 72 19 90ApJS. . .72. .5 67G a -19 4-1 -1 will webeabletocompute the logV(>S)-\ogScurvesfor value for«=1.48+0.05withanassociatednormalization power lawoftheformN(>S)=KS~,weobtainabest-fit et al.1984).Onlywhenthe sample iscompletelyidentified characterized byitsownnumber-count relationship(Gioia contributions fromdifferent classesofobjects,eachclass number-flux spacethisisthe resultofthesumdifferent X =2.68X10.Wehave alreadyshownthatinthe dence ofthedatapoints)canbecomputed.Assumingasingle similar tothatdescribedbyGioiaetal.(1984),abestfit to estimate of26,023í^sourcessterad(fromGioiaet al. the data(indifferentialspacesoastopreserveindepen- sources persquaredegree).Thiscompareswithaprevious 1984), usingonly84extragalacticsources.Usingaprocedure the 0.3-3.5keVband,is25,146ísourcessterad(T.TÍoJ No. 3,1990 © American Astronomical Society • Provided by theNASA Astrophysics Data System 13 13 13 13 13 14 14 13 13 13 14 14 Galactic hydrogencolumndensityinthedirectionofeachIPCpointing. 2.62 X10“ 2.18X10“ assuming apower-lawspectrumwithenergyindex=landthemeasured 3.77X10“ 3.14X10“ 1.82X10“ 7.31 X10" 6.09X10" 1.52X10“ 1.26X10“ 1.05X10“ 8.78X10“ 5.08x10“ Limiting SensitivityAreaCovered 21 a (ergs cm“s)(squaredegrees) The skycoverageisproducedusingthestandarddetectionalgorithmand EINSTEIN EXTENDEDMEDIUM-SENSITIVITYSURVEY a Sky CoverageUsedforComputationoflogN(>S)-logS 249.5 319.1 191.6 139.4 29.4 94.2 55.2 15.1 6.37 0.72 0.09 2.54 TABLE 5 Limiting Sensitivity u-21 -1 4-12 -21 violate themeasureddiffuseX-raybackgroundintensity. in the0.3-3.5keVenergyband. TheresultingEMSScatalog for AXAFwithits100-foldimprovementinsensitivity. the expectedflatteningincounts.Thisexperimentwaits Clearly amuchdeepersurveyisneededtodetectandmeasure flattening isexpectedtooccureventuallyinordernot to end ofthedistribution(fredshift(z<1)andlow- 1982; Margon,Downes,and Chanan1985),theAGNsfound and Downes1981;Kriss Cañizares1982;Reichertetal sources carriedoutbyother authors(e.g.,Chanan,Margon, samples andfromsystematicstudiesofserendipitousEinstein can besummarizedasfollows:395AGNs,220Galacticstars, count distribution. been foundwithanassociatednormalizationK=2.68X10“ We haveusedthissampletorevisethesurfacedensityof galaxies. InagreementwithpublishedresultsfromtheMSS 98 clustersofgalaxies,34BLLacobjectsandcandidates, and for apower-lawdescriptionofthenumber-countrelation. No previously unknownandarecataloguedhereforthefirsttime. tion oftheextragalacticpopulation,followedbyclusters of 13 “normal”galaxies.AGNsstillrepresentthelargestfrac- extragalactic sources.Abest-fitvalueof«=1.48+0.05has cal objectsarefoundinthesurvey.Mostofwere significant flatteningisevidentatthelow-fluxendof the currently 91%opticallyidentified.Manyclassesofastronomi- selection effectshavealsobeenexamined.Thesampleis sources, aswellthedetectionalgorithmsused.Possible Galactic latitudesky(\b\>20°).Wehavedescribedtheselec- consists of835serendipitoussourcesdetectedatorabovea discovered byothermeans (see, however,§Vaforamore tion criteriaadoptedfortheIPCfieldsand signal-to-noise ratioof4in778squaredegreesthehigh galactic population(AGNs,clusters,“normal”galaxies,BLLacobjects, and class1objects).Best-fit±aerrorsontheslopeareindicated. The opticalcontentofthesurvey(761sourcesidentified) Fig. 7.—IntegrallogA^(>S)-\ogSrelationshipfortheEMSSextra- © American Astronomical Society • Provided by theNASA Astrophysics Data System GIOIA ETAL. ject tous.Wehavebenefitedfromhelpfuldiscussion,stimu- We alsoplantopublishanatlasoffindingchartsforallthe properties withcosmictime.Adetaileddiscussionofthe detailed characterization).X-ray-selectedclustersofgalaxies redshift z>0.2)comparedwithclustersfoundinoptical wish tothanktheUniversityofHawaiiTimeAllocation vation timenecessarytocarryonthisresearchoveranumber particular acknowledgementgoestotheMMTTimeAlloca- hospitality duringthelongperiodsspentatVLA.A Hubble SpaceTelescopearchive. EMSS sources(incollaborationwithR.BurgandB.McLean optical identificationsofthesurveysourcesandspec- cluster samplewillbeusedtoinvestigateevolutionary partial supportofNationalScienceFoundationgrantAST- which madetheUHobservationspossiblewasprovided with Multiple MirrorTelescopeareespeciallythanked,including of years.Themembersopticaltelescopestaffforthe We thankR.Ekers,M.Goss,andtheVLAstafffortheirkind at STScI)makinguseofthedigitizedSchmidtplates surveys. Uponcompletionoftheidentificationprogram, are foundatlargerredshift(about40%ofthema contracts andgrantsNAS8-30751,NAG8-442,NAG8- Committee forgrantingobservingtimewhichwasfundamen- assistants C.Heller,J.McAfee,andRobertson.We also F. Chaffee,C.Foltz,K.Gilmore,andD.Ouelettenight lating comments,andexchangeofdatainformationwith which thislong-termprojectwascarriedout,andtoR. High EnergyAstrophysicsadministrator, forhissupportof Piano SpazialeNazionaleare thankedforfinancialsupportof 658), NSF(throughgrant AST-8715983), andtheItalian gram (throughgrantsSS48-8-84,SS88-3-87),NASA at CfA;DanielEgretranthecross-correlationinStrasbourg. troscopic andphotometricdatawillbepresentedelsewhere. telescope operatorsF.CheighandD.Woodworth.TheCCD tal toourstudyofdistantclustersgalaxies,andthe 88" tion Committeeforcontinuoussupportingrantingtheobser- to E.Bohlen,J.DePonte,McSweeney,D.Plummer,andC. Einstein dataaideswereofinvaluablehelp.Specialthanksgo bank. P.Giommiperformedthecross-correlationwith T. Fleming,R.Giacconi,P.Giommi,J.Halpem,D.Helfand, colleagues attheHighEnergyAstrophysicsDivisionof continuous supportandencouragementduringtheyearsin tive difficulties. this work.J.T.S.wishesto thankL.Kaluzienski,NASA 8615631. TheSmithsonianInstitutionScholarlyStudies Pro- Stem. WewereintroducedtoSIMBADbyJoyceRey-Watson use theirIPCimagesbeforetheyenteredtheEinsteindata J. Huebra,G.Kriss,D.Kunth,Liebert,Maccagni,B. a largenumberofpeople.Wewouldliketothankour Giacconi fororiginallysuggestingtheusefulnessofthispro- the scienceinthisprogramthrough considerableadministra- F. Walter,andG.Vettolani.Wearegratefultothemany Margon, R.Perley,M.Postman,G.Setti,D.Silva,B.Tully, G. Chanan,J.Danziger,R.Ekers,A.Fabian,Filippenko, CfA andS.Anderson,R.Burg,J.-P.Caillault,C.Cañizares, EXOSA Tdatabase.R.Burgkindlyprovidedthesoftwarefor Einstein guestobserverswhogaveusadvancepermissionto the IRAScross-correlation.Manycomputerspecialistsand We areverygratefultoH.TananbaumandG.Settifor Vol. 72 19 90ApJS. . .72. .5 67G No. 3,1990 Abell, G.O.1958,Ap.J.Supply3,211. Abell, G.O.,Corwin,H.G,andOlowin,R.P.1989,Ap.J.SuppL,70,1. Bahcall, N.A.,andSoneira,R.M.1983,Ap.J.,270,20. Bergoffen, M.J.,Stocke,J.T.,Walter,F.,andFleming,T.A.1988,Pub. Bennett, C.L.,Lawrence,C,Garcia-Barreto,J.A.,Hewitt,N.,and Caillault, J.,Helfand,D.Nousek,J.A.,andTakalo,L.O.1986,Ap. Boyle, B.J.,Shanks,T.,andPeterson,A.1988,M.N.R.A.S.,235,935. Biermann, P.,etal.1985,Ap.J.,293,303. de Ruiter,H.R.,Willis,A.G.,andArp,C.1977,Astr.Ap.SuppL,28, de Körte,P.A.J.,etal.1981,SpaceSei.Rev.,30,495. Cleary, M.N.,Heiles,C,andHaslam,C.G.T.1979,Astr.Ap.SuppL, Chanan, G.A.,Margon,B.,Helfand,D.J.,Downes,R.andChance, Chanan, G.A.,Margon,B.,andDownes,R.A.1981,Ap.J.{Letters), .1989/?,A.J.,98,692. Elvis, M.,Schreier,E.J.,Tonry,Davis,andHuchra,J.1981,Ap. Fabbiano, G.1989,Ann.Rev.Astr.Ap.,27,87. Elvis, M.,andVanSpeybroeck,L.1982,Ap.J.{Letters),257,L51. Feigelson, E.D.,Maccacaro,T.,andZamorani,G.1982,Ap.J.,255, Feigelson, E.D.,andKriss,G.A.1981,Ap.J.{Letters),248,L35. Fleming, T.A.1988,Ph.D.thesis,UniversityofArizona. Giacconi, R.,etal.1979,Ap.J.,230,540. Fleming, T.A.,Liebert,J.,Gioia,I.M.,andMaccacaro,1988,Ap. Fleming, T.A.,Gioia,I.M.,andMaccacaro,1989û,Ap.J.,340,1011. Gioia, I.M.,Geller,M.J.,Huchra,Maccacaro,T.,Steiner,J.E.,and Gioia, I.M.,Feigelson,E.D.,Maccacaro,T.,Schild,R.,andZamorani, Gioia, I.M.,etal.1990,inpreparation. Gioia, I.M.,Maccacaro,T.,Morris,S.L.,Schild,R.E.,Stocke,J.and Giommi, P.,Tagliaferri,G.,andAngelini,L.1988,inX-RayAstronomy Gioia, I.M.,Maccacaro,T.,Schild,R.E.,Stocke,J.Liebert,W., Gioia, I.M.,Maccacaro,T.,Schild,R.E.Giommi,P.,andStocke,J.T. Hamden, F.R.,Fabricant,D.G.,Harris,E.,andSchwarz,J.1984, Johnson, M.W.,Cruddace,R.G.,Ulmer,P.,Kowalski, and lovino, A.,andShaver,P.A.1988,Ap.J.{Letters),330,L13. Helfand, D.J.,andCaillault,J.-P.1982,Ap.253,760. Heiles, C.,andCleary,M.N.1979,AustralianJ.Phys.Ap.SuppL,AI,1. Harris, D.E.,andJohnson,H.M.1985,Ap.J.,294,649. Kriss, G.A.1982,Ph.D.thesis,MassachusettsInstituteofTechnology. IRAS PointSourceCatalog.1985,JointScienceWorkingGroup Maccacaro, T.,Gioia,I.M.,Maccagni,D.,andStocke,J.T.1984,Ap. J. Maccacaro, T.,andGioia,I.M.1986,Ap.J.,303,614. Maccacaro, T.,etal.1982,Ap.J.,253,504. Kurtz, M.J.,Huchra,Beers,T.C,Geller,Gioia,I. M., Kriss, G.A.,andCañizares,C.R.1982,Ap.J.,261,51. Koo, D.C.1981,Ap.J.{Letters),251,L75. Katgert, P.,Thuan,T.X.,andWindhorst,R.A.1983,Ap.J.,275,1. J. P.Henry:InstituteforAstronomy, UniversityofHawaii,2680WoodlawnDrive,Honolulu, HI96822 I. M.Gioia,T.Maccacaro,R.E.Schild,andA.Wolter: HarvardSmithsonianCenterforAstrophysics,60GardenStreet, Cambridge, MA02138 J. T.Stocke: Center forAstrophysicsand Space Astronomy,University ofColorado,CampusBox 391, Boulder,CO80309 S. L.Morris:TheObservatories oftheCarnegieInstituteWashington,813Santa Barbara Street,Pasadena,CA91101 J., 304,318. J., 246,20. A.S.P., 100,736. 36, 95. Burke, B.F.1983,Nature,301,686. 243, L5. 211. D. 1982,Ap.J.{Letters),261,L31. 331, 958. 392. eron, D.Kunth,B.Rocca-Volmerange,andJ.TranThanhVan(Gif- Wolter, A.1987,inHighRedshiftandPrimevalGalaxies,ed.J.Berg- G. 1983,Ap.J.,271,524. sur-Yvette: EditionsFrontières),p.231. Scientific SpecificationoftheDataAnalysisSystemforEinstein with EXOSAT,ed.N.E.WhiteandR.Pallavicini{Mem.Soc.Astr. Danziger, I.J.,Kunth,D.,andLub,J.1984,Ap.283,495. Stocke, J.1982,Ap.{Letters),255,L17. Wood, K.S.1983,Ap.J.,266,425. (Washington, DC:GPO). 393). Italiana, No.59,p.33). 1986, Ap.J.,307,497. {Letters), 284,L23. Observatory {HEAO-2)IPC{SmithsonianAp.Obs.Spec.Rept.,No. Maccacaro, T.,Schild,R.E.,andStauffer,J.1985,A.J.,90,1665. © American Astronomical Society • Provided by theNASA Astrophysics Data System EINSTEIN EXTENDEDMEDIUM-SENSITIVITYSURVEY REFERENCES Maccacaro, T.,Gioia,I.M.,Wolter,A.,Zamorani,G.,andStocke,J.T. Maccacaro, T.,Gioia,I.M.,andStocke,J.T.1984,Ap.J.,283,486. Maccacaro, T.,Romaine,S.,andSchmitt,J.H.M.1987,'mIAU Nesci, R.,Gioia,I.M.,Maccacaro,T.,Morris,S..,Perola,G.C,Schild, Margon, B.,Anderson,S.F.,Mateo,M.,Fich,andMassey,P.1988, Maccagni, D.,Gioia,I.M.,Maccacaro,T.,Schild,R.E.,andStocke,J.T. Maccagni, D.,Garilli,B.,Gioia,I.M.,Maccacaro,T.,Vettolani,G.,and Morris, S.L.,Liebert,J.,Stocke,J.T.,Gioia,I.M.,Maccacaro, Margon, B.,Downes,R.A.,andChanan,G.A.1985,Ap.J.SuppL,59, Margon, B.,Chanan,G.A.,andDownes,R.A.1981,Nature,290,480. Margon, B.,Boroson,T.A.,Chanan,G.Thompson,I.and Oort, J.H.,Arp,anddeRuiter,H.1981,Astr.Ap.,95,7. Morris, S.L.,Schmidt,G.D.,Liebert,J.,Stocke,Gioia,I.M.,and .1987,Pub.A.S.P.,98,269. Reichert, G.A.,Mason,K.O.,Thorensten,J.R.,andBowyer,S.1982, Raymond, J.C,andSmith,B.W.1977,Ap.SuppL,35,419. Pravdo, S.H.,andMarshall,F.E.1984,Ap.J.,281,570. Rosner, R.,Golub,L.,andVaiana,G.S.1985,Ann.Rev.Astr.Ap.,23, Schild, R.,Leach,Weekes,T.,andGursky,H.1980,A.J.,85,121. Shuder, J.,andOsterbrock,D.1981,Ap.250,55. Shaver, P.A.1988,inIAUSymposium130,EvolutionofLargeScale Shanks, T.,Hale-Sutton,D.,andBoyle,B.J.1988,inIAUSymposium Schmidt, M.,andGreen,R.1983,Ap.J.,269,352. Schmidt, M.1968,Ap.J.,157,393. Maccacaro, T.,Gioia,I.M.,Schild,R.E.,Wolter,A.,Morris,S.L.,and Zamorani, G.,Gioia,I.M.,Maccacaro,T.,andWolter,A.1988, Astr. Wolstencroft, R.D.,Ku,W.H.M.,Arp,C,andScarrott,S.1983, White, S.D.M.,Silk,J.,andHenry,J.1981,Ap.{Letters),251, L65. Trümper, J.1984,inX-RayandUVEmissionfromActiveGalacticNuclei, Stocke, J.T.,Liebert,J.,Schmidt,G.,Gioia,I.M.,Maccacaro,Schild, Stocke, J.T.,Liebert,J.,Gioia,I.M.,Griffiths,R.E.,Maccacaro, Stocke, J.T.,etal.1990û,inpreparation. Stark, A.A.,Heiles,C,Bally,J.,andLinker,R.1989,privatecommuni- Spinrad, H.1980,inIAUSymposium92,ObjectsofHighRedshift,ed.G. Stocke, J.T.,Morris,S.L.,Gioia,I.M.,Maccacaro,Schild,R.E.,and Stocke, J.T.,Liebert,W.,Stockmann,Danziger,I.J.,Lub, Stocke, J.T.,Schneider,P.,Morris,S.L.,Gioia,I.M.,Maccacaro, T., Ap. J.,334,597. bidge (Dordrecht:Reidel),p.597. Wolter, A.1988,Ap.J.{Letters),334,LI. Symposium 124,ObservationalCosmology,ed.A.HewittandG.Bur- 1988, Ap.J.,326,680. 23. 1987, Ap.J.316,132. Ap. J.,260,437. Maccacaro, T.1987,Ap.J.,314,641. Schild, R.E.,andWolter,A.1990,inpreparation. Schneider, D.1986,Pub.A.S.P.,98,1129. 415. R. E.,andWolter,A.1989,Ap.J.,344,104. cation. Abell andP.J.E.Peebles(Dordrecht:Reidel),p.39. 334), p.222. Structures intheUniverse,ed.J.Audouze,M.C.Pelletan,andA. M. C.Pelletan,andA.Szalay(Dordrecht:Kluwer),p.371. Ap., 196,39. Wolter, A.1990/?,Ap.J.,348,141. 27P. Szalay (Dordrecht:Kluwer),p.359. 130, EvolutionofLargeScaleStructuresintheUniverse,ed.J.Audouze, ed. W.BrinkmannandJ.Trümper(MPERept.184),p.254. Maccacaro, T.,Griffiths,R.E.,andGiommi,P.1982,M.N.R.A.S.,200, R. E.,Maccagni,D.,andArp,H.C.1985,Ap.J.,298,619. Danziger, I.J.,Kunth,D.,andLub,J.1983,Ap.273,458. Maccacaro, andM.E.Ulrich(SpringerLectureNotesinPhysics,Vol. Stocke, J.T.1989,inBLLacs:10YearsAfter,ed.L.Maraschi, and Schild,R.E.1987,Ap.J.{Letters),315,Lll. M.N.R.A.S., 205,67. 619