1997 STATISTICS Cover: Radio Image of the Supernova Remnant W50

NATIONAL RADIO O B S S u E M R M V A I R N Y G ASTRONOMY OBSERVATORY

1997 STATISTICS Cover: Radio image of the supernova remnant W50. The image was made with the Very Large Array at 1.4 GHz from a mosaic of 58 individual images. The regions of most intense radio emission are shown in red while regions of lower brightness are colored blue. The W50 remnant is powered by the dying star SS433 seen near the center; helical filaments of radio emission can be seen emanating from SS433. Observers: G. Dubner, F. Mirabel, M. Holdaway, M. Goss NATIONAL RADIO ASTRONOMY OBSERVATORY

Observing Summary 1997 Statistics

March 1998 SCIENTIFIC HIGHLIGHTS

The first VLSI Satellite project, the VLBI Space Observatory Program (VSOP), has been successful. The Japanese HALCA satellite, launched in February, observed the radio source PKS 1519-273 at 1.6 GHz on 22 May, together with the VLBA and VLA. The data were correlated successfully in Socorro on 12 June and an image was produced a few days later. The image, a point source, confirmed the proper operation of the entire system, including the Green Bank ground station and the VLBA correlator. Since mid-1997, VSOP has made a transition from in-orbit checkout to general scientific observing. Nearly 50 scientific observations have been processed by the VLBA correlator and released to the investigators. Several images of compact extragalactic radio sources have been produced at 1.6 and 5 GHz, with considerably higher resolution than is available with ground-only VLBI at the same frequencies. Numerous scientific results from these images are expected to be published over the next year.

The 12 Meter Telescope has conducted extensive measures of the Martian CO absorption in support of the Mars Global Surveyor (MGS), which entered Mars orbit on 12 September. The MGS is an orbiter mission to conduct the first global mapping of the surface mineralogy, topology, and magnetic fields, at high-to-medium resolution. The 12 Meter CO data, taken regularly over the past year, and at three-day intervals since September, are used to provide atmospheric sounding measurements of the martian atmosphere in support of the aerobraking maneuvers of the MGC orbiter, which dips into the upper atmosphere in order to circularize its orbit. The CO data provide measures of the dust heating of the lower atmosphere (0-50 km), which in turn provide early warning of associated changes in the atmospheric densities encountered by the MGS orbiter. The CO 2-1 absorption has also produced highly accurate measures of the pressure changes at 70 km altitude, which show a very good correlation with the density changes seen by MGS. For example, the CO data showed cold, dust-free conditions as MGS entered orbit, and also indicated a significant trend of increasing temperatures up to 21 September, as a result of increasing dust loading of the lower atmosphere. It will soon be possible to determine whether the current dust behavior is a short-term phenomenon such as observed during the March-July period, or is the beginning of truly global dust storm activity on Mars.

A large HI supershell has been discovered near the Galactic plane in Aquila. Observations with the 140 Foot Telescope show an irregular spherical shell sitting atop a well-defined massive cone which connects to a molecular cloud in the Galactic Plane. The shell extends at least 550 pc up into the Galactic halo. The system requires the energy of 10-100 superaovae over 10 million years for its creation. It is associated with a complex of supemovae, star-forming regions and HE regions, some of which may have been induced by a shock wave related to formation of the supershell. The VLA and VLBA have made the first detection of radio emission from a Gamma-Ray Burster. The gamma-ray burst was detected by the BeppoSAX satellite on 8 May and the VLA observed the region within four hours. Radio emission was first seen on 13 May, and VLBI detection was made on 16 May, yielding a position accurate to less than a milliarcsecond. Continued monitoring shows the object to be variable in both intensity and spectral index, and to have a proper motion no greater than 50 milliarcseconds per year. If the fluctuations are the result of scintillation due to inhomogeneities in the interstellar medium, the angular size of the source in the first few weeks was ~ 3 microarcseconds, a linear size of 1017 cm at a distance of 1028 cm. The subsequent damping of the scintillations is presumed due to relativistic expansion of the fireball to an angular size no longer subject to scintillation. The object is also observed optically, and has a minimum redshift of z = 0.85, thus greatly strengthening the case for cosmological distances to these objects.

The long-chain cyanopolyyne species HCnN has been reliably identified in the molecular cloud TMC-1 via observations at the 140 ft telescope of two consecutive transitions (J= 39-38 and J = 38-37). The observations are based on frequencies expected from 2 laboratory work at the Center for Astrophysics. The column density of HCnN is 2.8 x 10" cm" . The abundance of the cyanopolyynes thus decreases smoothly from HC5N to HC,^, the decrement from one to the next being about 6 for the longer carbon chains. This detection of HCnN, a molecule with a molecular weight (147 amu) nearly twice that of the amino acid glycine, demonstrates that detectable quantities of fairly large organic molecules can form in extraterrestrial sources under conditions markedly different from those on Earth.

Several programs to study the physical and chemical composition and the evolution of comet Hale-Bopp have been performed at + the 12 Meter Telescope. Studies of CO, CN, CS, H2S, HCO , H2CO, CH3OH and HCN have chronicled the chemical evolution and the temperature of the comet as it approached perihelion. The first detection of HNC has been made in a comet, and yields a ratio [HNC]/[HCN] - 0.5, close to values found in dark clouds. This ratio suggests that Hale-Bopp was formed from pristine interstellar matter and did not undergo much processing in the presolar nebula.

The AGN galaxy NGC4258 continued to provide impressive results during 1997. VLBA/VLA observations of the warped disk of H20 molecules surrounding a supermassive object at the galaxy's core have yielded a precise position for the central object, presumably a black hole with 3.5xl07 solar masses. Proper motions have been measured for individual maser spots within the disk. Continuum emission has been detected in the nuclear region, and shows an offset from the calculated position of the central object consistent with the jet model proposed by Blandford and Konigl in 1979. The proper motion detections will allow a trigonometric determination of the distance to NGC4258 to within five percent. OBSERVING HOURS

est. est. est. 30

1985 86 87 88 89 90 91 92 93 94 95 96 97 98 99 2000 Calendar Year

140 Foot £2] 12 Meter ^ VLA □ VLBA

Figure 1. This figure shows the hours for observing on each telescope during the last decade. Includes astronomical observing, testing, and calibration. DISTRIBUTION OF SCHEDULED OBSERVING TIME

12 Meter 140 Foot VLA VLBA

8-B :• ■ •:•: ■ :* -

v< •••■ *.•■ .V V. iV V •*•' SL lU V. M 7 ^ n o o "■^ © :mm m 1 \ 3 ! imm O Wi7 14 1 'm S A 'm'A 'A m, x22 Ji nWi ■§■? ^IIIIH 1988 89 90 91 92 93 94 95 96 97 1988 89 90 91 92 93 94 95 96 97 1988 89 90 91 92 93 94 95 96 97 1993 94 95 96 97 Calendar Year Calendar Year Calendar Year Calendar Year

NRAO Staff Y//\ Visitors Kggfl Testing and Calibration

Figure 2. These graphs show the number of hours scheduled for testing and calibration, and for observing by the NRAO staff and by visitors on each telescope system. 12 METER RADIO TELESCOPE SUMMARY

100 -- A 80 1 r s n A A i ^ 1 X / i * i / \ ^C 1 JL - ^ r / ^ / \ / \ A / ■\ X * 60 1 A A n A r 1 t J i A f 1 A r l A Z 3 £ - u D: 40 I [ U ULf - Y ^ V Y 20 J V / I 7 \i V l 0 1 ^ L i V i V 1 1 i V * v r <* .- & S v V J i .-• '«** ^ X ?: ^i /' ' j P**' »*»' > !•' V t > J.. A ^ >

Calendar Year

Observing Installation, Maintenance and Calibration — — Equipment Failure, Weather and Interference

Figure 3. This summary for each quarter of the calendar year shows the percentage of the total time in the year (8760 hours) that the telescope was scheduled for observing; for routine calibration, maintenance, and installation of new experiments; and the percentage of time lost due to equipment failure, bad weather, and radio interference. The telescope is removed from service for a period of four to six weeks each summer during the wet season. This period is used for maintenance and upgrading of the instrument. 140 FOOT RADIO TELESCOPE SUMMARY

100

"^ _ ^ M. ^ ^ mm «■ A ^ 80 L^ ^ ▼ % - C ^ - « 60 - - & 40 - - 20 ^k, •s ^ A

"•; V, * 4 A .-, • •* ^■^ ■ •« ..- V. .^^^. '^. IT *►-. ,-*•"•

Calendar Year

Observing Installation, Maintenance and Calibration — — Equipment Failure, Weather and Interference

Figure 4. This summary for each quarter of the calendar year shows the percentage of the total time in the year (8760 hours) that the telescope was scheduled for observing; for routine calibration, maintenance, and installation of new experiments; and the percentage of time lost due to equipment failure, bad weather, and radio interference. VERY LARGE ARRAY TELESCOPE SUMMARY

100 - - 80 *> /V ,^, ,B',i \0 - — "^ ^ V ^ ^" "* ^ ■■ s " *" ^ ^ '" -*- 3 60 V - - ou 40 N K s^ •N ^m _ —. ^ ^^ _ ^ _- 20 - m ••». »^ ,» ■ •• »» »•• »•! ._ .« •aa •^ ■• ■■*. »^ ■•■ _ *•' .«, »*•« »^— ra .- »*• .— •»« M. .., *imi m» i .-' ■■*■ !«■■ W^ .

Calendar Year

Observing Testing, Maintenance and Calibration — — Downtime

Figure 5. This summary for each quarter of the calendar year shows the percentage of the total time in the year (8760 hours) that the telescope was scheduled for observing; for routine system testing, maintenance, and calibration; and the percentage of time lost due to hardware or software failure, power failure, or bad weather. VERY LONG BASELINE ARRAY TELESCOPE SUMMARY

100 - - 80

■ - 60 - ^- ^ ^ ^ ^ > ^ ^ r ■ ^ /^ & 40 t - - r /- ^ - V > - ^ s s/ N 20 1 A - V r - ■•■^ ,— IH1 ■ ■■i • 101 ■ ^a

Calendar Year

Observing Installation, Maintenance and Calibration — — Equipment Failure, Weather and Interference

Figure 6. This summary for each quarter of the calendar year shows the percentage of the total time in the year (8760 hours) that the telescope was scheduled for observing; for routine calibration, maintenance, and installation of new experiments; and the percentage of time lost due to equipment failure, bad weather, and radio interference. It should be noted that about 15% of the time cannot be scheduled because it is in short blocks. FULL-TIME EMPLOYEES

1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 Calendar Year Research and Operations BSggj VLBA Construction WWWW GBT Construction I IMMA Phase I

Figure 7. This figure shows the total number of NRAO full-time employees at the end of each year, projected into the future. NUMBER OF PEOPLE OBSERVING WITH NRAO TELESCOPES 1050 1000 Kfifia Visitors and Students est. 950 Hi Jansky Postdoctorals 900 23 NRAO Staff 850 wwww Number of Institutions 800 750 700 650 600 o w 1 550 I 500 450 400 350 m 300 250 200 150 100 50 0 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 Calendar Year

Figure 8. The bar chart shows for each calendar year the number of NRAO research staff and the number of NRAO postdoctorals (Jansky Postdoctorals) who used the telescopes. In addition, it shows the total number of visitor-users of NRAO telescopes and the number of institutions from which the NRAO visitors came.

10 DISTRIBUTION OF SCHEDULED OBSERVING PROGRAMS

IN VARIOUS RESEARCH AREAS, BY PERCENT

VLA VLBA Overall I. SOLAR SYSTEM —

Sun, Planet, Satellites, and Comets 14% 5% 6% 3% 7%

H. STELLAR —

Pulsars, X-ray Sources, Planetary Nebulae, 11% 25% Circumstellar Shells, Supernova Remnants, Masers, Novae, Supemovae, and Stars

HI. GALACTIC —

Galactic Structure, Center, Molecular Clouds, HII Regions, 49% 35% 19% 13% 24% Star Formation, Molecules, and Interstellar Medium

IV. EXTRAGALACTIC —

Normal and Active Galaxies, Radio Galaxies, Clusters, 26% 35% 47% 61% 46% Quasars, VLBA Studies, Extragalactic Molecules, and Cosmology

11 DISTRIBUTION OF TELESCOPE TIME BY PERCENT

12 Meter 140 Foot VLA VLBA 1996 Summary Visitors 49% 69% 53% 36% 52% Students 11% 8% 8% 3% 7% NRAO Staff 12% 6% 12% 66% 9% Jansky Postdoctorals 1% 3% 3% 2% 2% Test and Calibration 24% 3% 13% 13% 14% Maintenance and Installation 1% 2% 10% 12% 8%

12 INSTITUTIONS FROM WHICH VISITORS CAME TO USE NRAO TELESCOPES DURING 1997

140 FOOT 12 METER VLA VLBA

1 Agnes Scott College (GA) x 2 Air and Space Museum (DC) x 3 Alabama, University of x 4 American Assoc. Variable Star Observers (MA) x 5 Amsterdam, University of- Astronomy Institute x

6 Applied Research Corporation x 7 Arcetri Astrophysical Observatory (Italy) x 8 Arizona, University of- Steward, LPL, SMTO x 9 Arizona State University x 10 Armagh Observatory (Ireland) x

11 Astrophysical Institute, Potsdam (Germany) x 12 Athens, University of (Greece) x 13 Barcelona, University of (Spain) x 14 Beijing Astronomical Observatory (China) x 15 Bochum, University of (Germany) x

16 Bologna, University of (Italy) x X 17 Bonn University (Germany) x X 18 Boston University (MA) X X 19 Brandeis University (MA) X X 20 Bristol - Cantock Close (UK) X X

13 140 FOOT 12 METER VLA VLBA

21 British Columbia, University of (Canada) 22 California, University of, Davis 23 California, University of, Berkeley 24 California, University of, Los Angeles 25 California, University of. Riverside - IGPP

26 California, University of, San Diego 27 California, University of, Santa Cruz - Lick 28 California, University of, Santa Barbara 29 Caltech - OVRA, Palomar, Big Bear Solar Obs. 30 Cambridge University - Cavendish, MRAO, IOA (UK)

31 Canadian Military College x 32 Carter Observatory (New Zealand) x 33 Catania University (Italy) x x 34 CFA - Harvard, SAO (MA) x x 35 CNR, IRA, Noto, Frascati (Italy) x

36 CNRS, France (CEN, Saclay) 37 Chalmers-Onsala Space Observatory (Sweden) 38 Chicago, University of - Yerkes Obs. (IL) 39 Chile, University of (Chile) 40 Cologne, University of (Germany)

14 140 FOOT 12 METER VLA VLBA

41 Colorado, University of - JILA, LASP, CAS A X X X 42 Columbia University (NY) X 43 Connecticut College X 44 Copernicus University - Torun Obs. (Poland) X 45 Cornell University (NY) x X

46 CSIRO - ATNF, Parkes Obs. (Australia) X X 47 DRAO (Dominion Radio Astrophys. Obs.) (Canada) X 48 DTM/Camegie Inst. (DC) - Las Campanas (Chile) X X 49 Durham, University of (UK) X 50 Edinburgh, University of (Scotland) X

51 ES A (European Space Agency) Spain X 52 ESO (European Southern Obs.) Chile, Germany X 53 ESTEC/ESA/EXOSAT (Netherlands) X 54 Fermi National Accelerator Lab (IL) X X 55 Florence, University of (Italy) X

56 Florida International University X 57 Florida, University of x X 58 Geneva University (Italy) X 59 Georgia Institute of Technology X

15 140 FOOT 12 METER VLA VLBA

61 Groningen, University of - Kapteyn Lab. 62 Guanajuato, Universidad de (Mexico) 63 Halmstad University (Sweden) 64 Hamburger Stemwarte (Germany) 65 Hanscom Air Force Base - AFGL (MA)

66 Hartebeesthoek Radio Astronomy Observatory x 67 Haverford College (PA) x 68 Hawaii, University of - IOA X 69 Haystack Observatory-NEROC (MA) X 70 Helsinki, University of - METS AHOVI, HUT (Finland)

71 Heidelberg Observatory (Germany) 72 Herfordshire, University of (UK) 73 Hitotsubashi University (Japan) 74 Ibaraki University (Japan) 75 IAFE - Buenos Aires (Argentina)

76 lAS-Frascati (Italy) 77 Illinois, University of - Vermillion Obs. 78 Imperial College (London) 79 Indian Institute of Science (India) 80 Institute of Astrophysics (Granada)

16 140 FOOT 12 METER VLA VLBA

81 Institute of Astrophysics (Paris) x 82 Institute for A & A (Andalucia) x 83 Institute Applied Physics (Bonn, Germany) 84 Institute of Physical & Chemical Res. (Japan) x 85 Inst. Space & Aeronautical Sciences (Japan) x

86 Iowa, University of x 87 Iowa State University x 88 IPAC - Infrared Processing/Analysis Center (CA) x 89 IRAM (France, Spain) X 90 Jagellonian University (Poland) X

91 Jena Universitat (Germany) x 92 Johns Hopkins University (MD) x 93 JPL - Goldstone (CA) X 94 Keele, University of (UK) X 95 Kentucky, University of X

96 Koln, University of (Germany) x 97 Krakow, University of (Poland) x 98 Kyoto University (Japan) X 99 KPNO/NOAO (National Optical Astronomy Obs.) X 100 Laguna, University of-Canarias (Spain) X

17 140 FOOT 12 METER VLA VLBA

101 Lancashire, University of Central (UK) x 102 Lawrence Livermore National Laboratory (CA) x 103 Lebedev Physics Institute - ASC (Russia) x 104 Leeds, University of (UK) x 105 Leiden, University of- Huygens (Netherlands) x

106 Liverpool Johns Moores University (UK) 107 Lisbon, University of (Portugal) 108 Lockheed Research Laboratory (CA) 109 Lowell Observatory (AZ) 110 Manchester, University of- Jodrell, NRAL (UK)

111 Maria Mitchell Observatory (MA) 112 Marseille Observatory (France) 113 Maryland, University of - Clark Lake (C A) 114 Massachusetts, University of - FCRAO 115 Melbourne, University of (Australia)

116 Meudon Observatory (France) 117 Mexico, University of-UNAM (Mexico) 118 Michigan, University of 119 Midi-Pyrenees Observatoire (France) 120 Milano Observatory (Italy)

18 140 FOOT 12 METER VLA VLBA

121 Minnesota, University of x 122 Missouri, University of x 123 Mizusawa Observatory (Japan) 124 MIT - Lincoln Laboratories (MA) 125 Monash University (Australia)

126 Moscow State U. - Sternberg State AI (Russia) x 127 MPIA (Heidelburg, Germany) x 128 MPIR (Bonn, Germany) x X 129 MPIfEP, Garching (Germany) x X 130 Munchen University (Germany) x

131 NAIC - Arecibo Observatory (NY, PR) x 132 National Astronomical Observatory (Japan) x 133 NASA/Ames Research Center (CA) x 134 NASA/Goddard Space Flight Center (MD) x 135 National Centre Radio Astrophysics (India) x

136 Newcastle, University of (UK) 137 New Hampshire, University of 138 NJTT - New Jersey Institute of Technology x 139 NFRA - JIVE, Dwingeloo, Zwiggelte, Westerbork x X 140 NMIMT - New Mexico Inst, of Mining Technology X X

19 140 FOOT 12 METER VLA VLBA

141 New Mexico, University of x x 142 New Mexico State University x 143 Nobeyama Observatory (Japan) x x x 144 North Carolina, University of x 145 North Carolina State University x

146 Northwestern University (IL) x x 147 NRC Herzberg - Algonquin Obs. (Canada) x 148 NRL - Naval Research Laboratory (DC) x x x 149 Ohio State University x 150 Open University (UK) x

151 Osaka, University of (Japan) x 152 Oxford University (UK) x x 153 Paris Observatory (France) x x x 154 Penn State University x x 155 Pennsylvania, University of x x

156 Pomona College (CA) x 157 Princeton University - Inst. Advanced Studies (NJ) x x x x 158 Puget Sound University (WA) x 159 Purple Mountain Observatory (China) x x 160 Queens University (Canada) x

20 140 FOOT 12 METER VLA VLBA

161 Radioastrophysical Observatory (Latvia) x 162 Raman Research Institute (India) x 163 Rice University (TX) X 164 Rochester, University of (NY) 165 Royal Greenwich Observatory (UK)

166 Royal Observatory-UKIRT,JCMT (Scotland) 167 Sao Paulo, University of- IAG (Brazil) 168 Scientific Data Center, Rome (Italy) 169 Seoul National University (Korea) 170 SETI Institute (CA)

171 Sinica Academia, IAA (Taiwan) X 172 Southampton, University of (UK) X 173 Southwest Research Institute (TX) X X 174 Space Telescope Science Institute (MD) X X 175 Special Astrophysical Observatory (Russia) X

176 St. Cloud State University (MN) X 177 St. Mary's University (Canada) X 178 Stockholm Observatory (Sweden) X 179 SUNY (allcampi) X 180 SFIT, ETH - Swiss Federal Institute of Tech.

21 140 FOOT 12 METER VLA VLBA

181 Sydney, University of (Australia) 182 Tasmania, University of (Australia) 183 Tata Institute Fund. Res. - RAC, GMRT (India) 184 Tel-Aviv University - Wise Obs. (Israel) 185 Texas, University of - McDonald Observatory

186 Thuringian State Observatory (Germany) 187 Tohoku University (Japan) 188 Tokyo University - Tokyo Astronomical Obs. (Japan) 189 Torino University (Italy) 190 Toronto, University of-Dunlap Obs. (Canada)

191 Trieste Astronomical Obs. - ISAS (Italy) 192 Trinity College (TX) 193 Tufts University (MA) 194 Union College (NY) 195 University College Cardiff (UK)

196 University College Dublin (Ireland) 197 Ural State University (Russia) 198 USNA - United States Naval Academy (MD) 199 USNO - United States Naval Observatory (DC) 200 Universities Space Research Association (DC)

22 140 FOOT 12 METER VLA VLBA

201 Utrecht, University of (Netherlands) x 202 Valencia, University of (Spain) X 203 Victoria, University of (Canada) X 204 Villanova University (PA) X 205 Virginia, University of X

206 Virginia Polytechnic Institute & State U. 207 Wellesley College (MA) x 208 Wesleyan University (CT) x X 209 Wisconsin, University of - Washburn Obs. X 210 Wollongong, University of (Australia) X

211 Yekatarinburg University (Russia) 212 York University (Canada)

NUMBER OF INSTITUTIONS 30 60 172 85

55 120 500 230 NUMBER OF VISITORS 32 NUMBER OF STUDENTS 8 19 79 4 NUMBER OF RESEARCH ASSOCIATES 1 3 8 NUMBER OF PERMANENT STAFF

TOTAL OBSERVERS 75 158 617 291

All told, 854 visitors, including 126 students, from 212 institutions.

23 NRAO STUDENT PROGRAM

1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 Calendar Year Figure 9. This figure shows for each calendar year the number of PhD students (salaried at NRAO and non-salaried), co-op students, and summer undergraduate and graduate students who observed or worked at the NRAO during that year. Beginning in 1987 the majority of the undergraduate summer students were funded by a separate NSF Grant for Research Experience for Undergraduates.

24 NRAO FRONT-END STATUS MARCH 1998 140 FOOT TELESCOPE TECHNICAL DATA SHEET NO. 12 PAGE 1 OF 5

PERSON(S) SYSTEM 3 dB RECEIVER FREQUENCY AMPLIFIER CALIBRATION SWITCHING IN TEMPERATURE BANDWDTH FEED TYPE POLARIZATION REMARKS NAME (GHz) TYPE VALUE SYSTEM CHARGE (KELVIN) (MHz)

PKXE SWITCH: REFERENCE OPEN HIGH ORTHOGONAL TEMPERATURE 50-68 SLEEVE ADJUSTABLE MHz DYNAMIC 38 UNEAR 300 CROSSED FROM FEED CHANGES FROM 50-88 MHz TO RANGE DIPOLE SB. 110-240 MHz OR TO 450-500 MHz TRANSISTOR + REMOVABLE 100 TO 100.000K NORROO REQUIRE TWO HOURS. DUAL T*y QUAD HYBRID 50-500 MHz ADJUSTABLE OR Rx CHANNEL AT FEED FOR 2 TO 2SO0K (SHANK) RCP AND LCP 110-240 BROADBAND FREQUENCY MHz 130 CROSSED SWITCH DIPOLE CAVITY RCP 450-500 FET BACKED FREQUENCY 450-500 MHz AMP M 50-250 MHz Rx MHz AMP 50-80 50 AND SWITCH CROSSED LCP DIPOLE

300-350 280-350 MHz COOLED 70 350-410 GASFET AMP 60-100 CAOTY DUAL BACKED 350-410 CHANNEL 60 CROSSED MHz WPOLES ONE OF THE Fl^ FEEDS 500-750 COOLED DUAL 280-350 MHz 500-750 GASFET AMP SCALAR ORTHOGONAL 350-410 MHz NORROO 50-70 80 MHz DUAL WITH UNEAR 500-750 MHz 300-1000 CHANNEL CROSSED FREQUENCY 750-850 MHz OR (SHANK) MHz Rx OtPOLES SK SWITCHING 750-1000 MHz RF HYBRID CAN BE USED. TO CHANGE FEEDS REQUIRES COOLED 750-850 TWO HOURS. CAVITY FOR RCP 750-950 HFET AND LCP MHz 45-50 80 OR DUAL 750-1000 CHANNEL SCALAR

COOLED 750-1000 750-1000 GASFET AMP SCALAR CHANGE BETWEEN 750-950 HFETS AND 50-70 80 MHz DUAL WITH 750-1000 FETS REOMRES 5 DAYS CHANNEL CROSSED WPOLES COOLED FREQUENCY 1.00-1.45 GASFET SMGLE SWITCHMG ORTHOGONAL 4K TO 6K (25 CM) DUAL 35-40 450 BEAM UNEAR SCALAR CHANNEL NOISE ADOMG NORROO 6/25 CM ORTH CIRCULAR OTHER FEED CHANGE REQUIRED TO SMTCH BANDS SMGLE BEAM 1.4K (SHANK) Rx COOLED iOR ORTH UNEARJ POLARIZATION TAKES TWO HOURS. 4.47-5.05 GASFET 50-60 580 DUAL BEAM DENT1CAL OR OR (6 CM) DUAL ORTH CIRCULAR CHANNEL OFFSET BEAM SWITCHING 3 HPBW OR (DENTKAL 12.8K LINEAR 25 NRAO FRONT-END STATUS MARCH 1998

TECHNICAL 0 ATA SHEET i

RECEIVER SYSTEM 3 dB PERSON(S) FREQUENCY AMPLIFIER CALIBRATION SWITCHING NAME TEMPERATURE BANDWDTH HEED TYPE POLARIZATION REMARKS IN (GHz) TYPE VALUE SYSTEM (KELVIN) (MHz) CHARGE THREE 2HE UP TO 120 SINGLE BEAM ORTHOGONAL 2K FREQUENCY OTHER CIRCULAR OR UNEAR POLARIZATIONS DUAL ...... 1.30-1.36 LINEAR OR ARE SELECTABLE. ORCULAR POLARIZATION 1.3-1.8 GHz 1.30-1.80 POLARIZATION NORROO Rx CHANNEL 19-25 ■ JiSL 1.36-1.43 OR AND REQUIRES ADJUSTMENTS FROM THE CONTROL COOLED HFET SMTCHMG ROOM. BAND CHANGE REQUIRES 2 TO 3 UNITED 1 1.60-1.72 L_ CIRCULAR (SIMMONS) ZEEMAN 1.36-1.43 200K OR ZEEMAN 1.6-1.72 NOISE ADDING BANDS POSSQLE AT REDUCED OnOENOES.

UP TO 250 TWO 2HE DUAL APPROX 1.6K BAND CHANGE REQUIRES FEED CHANGE. THIS 2.9-3.4 CHANNEL 38*4 SMGLE BEAM ORTHOGONAL FFFD 2.90-3.1 UNEAR AND TAKES 2-3 HOURS. FREQUENCY SWITCHING COOLED FET 1S0K UNITED 3.20-3.4 REQUIRES 50 MS BLANKMG TIME. 2-5 GHz FREQUENCY BEHRENS Rx SWITCHING UP TO 200 NOSE ADDING DUAL ONE 2HE 3K (GLASER) 4.6-5.0 RECEIVER BAND LIMITED BY 4.6-4.8 GHz FFFI). CHANNEL 28*5 SMGLE BEAM CIRCULAR AND FREQUENCY SMTCHMG REQUIRES SO MS COOLED HFET FEED UNITED 4.6-4.8 150K BLANKING TIME.

COOLED 7 6 CM. HFET CORRUGATED DUAL BEHRENS 7-FEED Rx 4.6-5.1 35-45 500 HORNS 4K NONE CONTINUUM USE ONLY. FOURTEEN CIRCULAR TOTAL POWER RF DETECTION. CHANNEL 3 HPBW (GLASER) APART

FIXED 7 GHz LO FREQ; COOLED DUAL UNEAR FREQUENCY OR GRAMMER 3.95-5.85 25K 500 CASSEGRAIN 2-2.5K FEED LIMITS LOWER FREQ. HFET DUAL CIRCULAR MUTATOR BEAM OPERATION TO 4.7 GHz (SMON) CASSEGRAIN

RECEIVERS 8-10 COOLED FREQUENCY OR HFET 35-40 500 CASSEGRAIN DUAL CIRCULAR 2-4K ANDERSON MUTATOR BEAM (OUNBRACK) COOLED 18.0-26.5 30-60 500 CASSEGRAIN DUAL CIRCULAR 3-7K FREQUENCY OR TWO BANDS: 18.0-22.5. 22.0-26.5 HFET MUTATOR BEAM 4 HOURS TO SWITCH BANDS STENNES

(OUNBRACK)

26 NRAO FRONT-END STATUS MARCH 1998 12 METER TELESCOPE PAGE 3 OF 5 TECHNICAL DATA SHEET NO. 12 PERSON(S) RECEIVER CONTINUUM 3 dB FREQUENCY AMPLIFIER CALIBRATION SMTCHING REMARKS IN TEMPERATURE SENSITIVITY BANDWIDTH FEED TYPE POLARIZATION (GHz) TYPE VALUE SYSTEM CHARGE (KELVIN) (JANSKY £EC) (MHz) NUTATING PERFETTO 65-118 SIS MIXER 60-100 COOLED HORN-LENS DUAL 6 K SMGLE-SKIEBANO MIXERS SSB 1.0 600 + OFFSET PARABOLA LINEAR SUBREFLECTOR UNDER CONSTRUCTION 30 NOT DUAL POLARIZATION NUTATING SHKUUE 70-115 SIS MIXER 8 CHANNEL 6 K COMPLETED DECEMBER 97 DS8 MEASURED 600 4 BEAMS SUBREFLECTOR NUTATING PUtttllO 130-170 SIS MIXER 100-180 NOT 600 COOLED HORN-LENS DUAL SMOLE-SMEBAND MIXERS SSB MEASURED + OFFSET PARABOLA UNEAR SUBREFLECTOR SMGLE-SOEBAND FILTER 150-400 NOT DUAL NUTATING PERFETTO 200-300 SIS MIXER 600 COOLED HORN-LENS MAGE TERMINATED M COLD LOAD SSB MEASURED UNEAR SUBREFLECTOR 100 NUTATING SHILUE 220-250 SIS MIXER NOT UNEAR 8 BEAM RECOVER DS8 MEASURED 600 8 FEEDS SUBREFLECTOR

27 NRAO FRONT-END STATUS MARCH 1998 VERY LARGE ARRAY TECHNICAL DATA SHEET NO. 12 PAGE 4 OF 5

SYSTEM 3 dB PERSON(S) 1 FREQUENCY AMPLIFIER CALIBRATION SWITCHING TEMPERATURE BANDWIDTH FEFD TYPE POLARIZATION REMARKS IN | (MHz) TYPE VALUE SYSTEM (KELVIN) (MHz) CHARGE DUAL NOSE INJECTION. 74 UNCOOLED ALL ANTENNAS. TEMPORARY MSTALLATION UUE FET 0^-1200 0.8 PRIME ORTHOGONAL 120 9.6 Hz. CIRCULAR 50 PERCENT CYCLE.

308- 3 MHz DUAL NOSE INJECTION. UNCOOLED PRIME 9.6 Hz. UUE 343 FET 150 (UNITED BY FOCUS ORTHOGONAL 10 INTERFERENCE) CIRCULAR 50 PERCENT CYCLE.

1340- DUAL 4 NOSE INJECTION. COOLED 9.6 Hz. Lit IF 1730 HFET 35 55 CASSEGRAM ORTHOGONAL ORCULAR 50 PERCENT CYOE.

4500- DUAL 4 NOSF INJECTION. COOLED CASSEGRAIN 9.6 Hz. UUE 5000 HFET 60 55 ORTHOGONAL ORCULAR 50 PERCENT CYCLE.

DUAL NOSE MJECTION. 8000- COOLED UUE 8800 35 55 CASSEGRAM ORTHOGONAL 4 9.6 Hz. HFET ORCULAR 50 PERCENT CYCLE.

14400- DUAL NOSE INJECTION. COOLED 7 9.6 Hz. UUE 15400 FET 110 55 CASSEGRAM ORTHOGONAL CIRCULAR 50 PERCENT CYCLE.

22000- DUAL NOSE INJECTION. COOLED 9.6 Hz. 50K Tap ON ANT 5. 9 (HIE 24000 HFET 130 55 CASSEGRAM ORTHOGONAL 10 ORCULAR 50 PERCENT CYCLE.

28 NRAO FRONT-END STATUS MARCH 1998 VERY LONG BASELINE ARRAY ic^nni^AL C )ATA SHEET NO. 12 PAGE 5 OF 5

FREQUENCY AMPLIFIER SYSTEM 3 dB PERSON(S) CALIBRATION SWITCHING (MHz) TYPE TEMPERATURE BANDWIDTH FEED TYPE POLARIZATION REMARKS IN (KELVIN) (MHz) VALUE SYSTEM CHARGE

312- WARM DUAL NOSE MJECTION. 342 200 30 PRIME UUE FET FOCUS ORTHOGONAL 10 80 Hz. CIRCULAR 50 PERCENT CYCLE.

596- WARM DUAL NOSE INJECTION. 622 200 30 OR 4 PRIME UUE FET FOCUS ORTHOGONAL 5 80 Hz. CIRCULAR 50 PERCENT CYCLE.

1350- COOLED DUAL NOSE MJECTION. 1750 HFET 30 128 CASSEGRAM ORTHOGONAL 2 80 Hz. UUE CIRCULAR 50 PERCENT CYCLE.

2150- COOLED DUAL NOSE MJECTION. 2350 HFET 35 128 CASSEGRAM ORTHOGONAL 2 80 Hz. UUE CIRCULAR 50 PERCENT CYCLE.

4600- COOLED DUAL NOSE MJECTION. 5100 HFET 40 128 CASSEGRAM ORTHOGONAL 2 80 Hz. UUE ORCULAR 50 PERCENT CYCLE.

8000- COOLED DUAL NOSE MJECTION, 6800 HFET 37 128 CASSEGRAM ORTHOGONAL 3 SO Hz. UUE CIRCULAR 50 PERCENT CYCLE.

12000- COOLED DUAL NOSE INJECTION. 15400 HFET 60 128 CASSEGRAM ORTHOGONAL 4 80 Hz. UUE CIRCULAR 50 PERCENT CYCLE.

21700- COOLED DUAL NOSE MJECTION. 24100 HFET 100 128 CASSEGRAM ORTHOGONAL 5 80 Hz. UUE CIRCULAR 50 PERCENT CYCLE.

41000- COOLED DUAL NOSE INJECTION. 45000 HFET 120 128 CASSEGRAM ORTHOGONAL 8 80 Hz. UUE ORCULAR 50 PERCENT CYCLE.

29 NRAO - STAFF AND VISITOR PUBLICATIONS 1997

AALTO, S.; RADFORD, S.J.E.; SCOVILLE, N.Z.; SARGENT, A.L "Variation of Molecular Line Ratios and Cloud Properties in the Arp 299 Galaxy Merger;' ApJ 475: L107-L110,1997.

AARON, S.E.; WARDLE, J.F.C.; ROBERTS, D.H. "A Multi-Frequency VLB A Polarization Study of 3C309.1." Vistas Astron. 41: 225-229,1997.

ACORD,J.M.;WALMSLEY,CM.;CHURCHWELL,E. "TheExtraoniinaiyOutflowTowaidsG5.89-0.39." ApJ475:693-704,1997.

ALBERDI, A.; KRICHBAUM, T.P.; GRAHAM, D.A.; GREVE, A.; GREWING, M.; MARCAIDE, J.M.; WTTZEL, A.; BOOTH, R.S.; BAATH, L.B.; COLOMER, F.; DOELEMAN, S.; MARSCHER, A.P.; ROGERS, A.E.E.; SCHALINSKI, C.J.; STANDKE, K. "The High-Frequency Compact Radio Structure of the Peculiar Quasar 4C 39.25." A&A 327: 513-521,1997.

ALEF, W.; BENZ, A.O.; GUDEL, M. "VLBI Measurements of the Size of dMe Stars." A&A 317:707-711,1997.

ALISSANDRAKIS, C.E.; DRAGO, F.; BASTIAN, T.; BOCCHIALINI, K.; DELBOUDINIERE, J.-P.; LEMAIRE, P.; VIAL, J.-C; HARRISON, R.A.; THOMPSON, B. "Microwave and UV Observations of Filaments with SOHO and the VLA." In: Advances in the Physics of Sunspots (ASP, ed. Schmieder et al.): 289-293,1997.

ANANTHARAMAIAH, K.; GOTHOSKAR, P.; CORNWELL, T.J. "Anisotropic Angular Broadening in the Solar Wind." Ap&SS 243:77-81,1997.

APPONI, A.J.; PESCH, T.C.; ZRJRYS, L.M.; WEHINGER, P.; WYCOFF, S. "Comet C/1995 Ol (Hale-Bopp)" IAU Circ. 6586: 14 March 1997.

APPONI, A.J.; PESCH, T.C.; ZIURYS, L.M.; WEHINGER, P.; WYCOFF, S. "Comet C/1995 Ol (Hale-Bopp)" IAU Circ 6599: 21 March 1997.

APPONI, AJ.; ZIURYS, L.M. "New Observations of the [HCO+]/[HOCr] Ratio in Dense Molecular Clouds." ApJ 481:800-808,1997.

ATHREYA, R.M.; KAPAHI, V.K.; MCCARTHY, P.J.; VAN BREUGEL, W. "Steep-Spectrum Radio Cores in High-Redshift Galaxies." MNRAS 289: 525-534,1997.

30 AVRUCH, I.M.; COHEN, A.S.; LEHAR, J.; CONNER, S.R.; HAARSMA, D.B.; BURKE, B.F. "Low Surface Brightness Radio Structure in the Field of Gravitational Lens 0957+561." ApJ 488: L121-L124,1997.

BAAN, W.A.; BRAGG, A.E.; HENKEL, C; WILSON, T.L. "NuclearFormaldehyde Absorption inNGC 253." ApJ491: 134-139, 1997.

BAATH, L.B.; MANTOVANI, F.; RANTAKYRO, F.T. "High Resolution Interferometry of the QSO 1422+202." A&AS 125: 453-458, 1997.

BACKER, D.C.; SALLMEN, S. "Polarimetry, Peculiar Mode and X-ray Alignment of PSR B1821-24." AJ 114: 1539-1543, 1997.

BALSER, D.S.; BANIA, T.M.; ROOD, R.T.; WILSON, T.L. "The 3He Abundance in Planetary Nebulae." ApJ 483: 320-334,1997.

BALSER, D.S.; BANIA, T.M.; ROOD, R.T.; WILSON, T.L. "High-Sensitivity Radio Observations of the 8.665-GHz 3He+ Hyperfme Line Emission from Planetary Nebulae." In: High-Sensitivity Radio Astronomy (Cambridge, ed. Jackson & Davis): 53-56,1997.

BANIA, T.M.; BALSER, D.S.; ROOD, R.T.; WILSON, T.L. "Quest for the 3-cm Spectral Limit: High-Sensitivity Measurements of 3He+ Emission from Galactic H n Regions." In: High-Sensitivity Radio Astronomy (Cambridge, ed. Jackson & Davis): 93-96,1997.

BANIA, T.M.; BALSER, D.S.; ROOD, R.T.; WILSON, T.L.; WILSON, T.A. "3He in the Milky Way Interstellar Medium: Summary of Relevant Observations." ApJS 113: 353-366,1997.

BARNES, P.; MYERS, P. "Physical and Chemical Evolution of Dense Cores from Isotopic CO, HCO+, NH3, and HQN Observations." IAU Symp. 170 (poster vol., NRAO): 4-7,1997.

BARVAINIS, R.; LONSDALE, C. "Radio Spectra of Radio Quiet Quasars. H Broad Absorption Line Quasars." AJ 113: 144-147, 1997.

BASTIAN, T.S. "Radio Emission from Solar and Stellar Flares." IAU Colloq. 153: 259-266,1997.

BASTIAN, T.S.; GARY, D.E. "On the Feasibility of Imaging Coronal Mass Ejections at Radio Wavelengths." JGR102:14031-14040, 1997.

31 BASTIAN, T.S.; GARY, D.E. "Prospects for the Solar Radio Telescope." In: Coronal Physics from Radio and Space Observations (Springer, ed. Trottet): 218-226,1997.

BASTIAN, T.S.; VLAHOS, L. "Energy Release in the Solar Corona." In: Coronal Physics from Radio and Space Observations (Springer, ed. Trottet): 68-90,1997.

BAUM, S.A.; O'DEA, C.P.; GIOVANNEMI, G.; BIRETTA, J.; COTTON, W.B.; DE KOFF, S.; FERETTI, L.; GOLOMBEK, D.; LARA, L.; MACCHETTO, F.D.; MILEY, G.K.; SPARKS, W.B.; VENTURI, T.; KOMISSAROV, S. "HST and Merlin Observations of 3C 264 - A Laboratory for Jet Physics and Unified Schemes." ApJ 483: 178-193,1997 Erratum: ApJ 492: 854,1998.

BEASLEY, A.J.; CONWAY, J.E.; BOOTH, R.S.; NYMAN, L.-A.; HOLDAWAY, M. "SEST Observations of Southern Flat-Spectrum Radio Sources." A&AS 124:469-474,1997.

BEASLEY, A.J.; DHAWAN, V. "The VLBA 3 mm Upgrade." In: Millimeter-VLBI Science Workshop (Haystack, ed. Barvainis & Phillips): 109-111,1997.

BEASLEY, A.J.; DHAWAN, V.; DOELEMAN, S.; PHILLIPS, R.B. "CMVA Observations of Compact AGNs." In: Millimeter-VLBI Science Workshop (Haystack, ed. Barvainis & Phillips): 53-56,1997.

BECKER, R.H.; GREGG, M.D.; HOOK, I.M.; MCMAHON, R.G.; WHITE, R.L.; HELFAND, D.J. "The FIRST Radio-Loud Broad Absorption Line QSO and Evidence for a Hidden Population of Quasars." ApJ 479: L93-L96,1997.

BELL, M.B.; FELDMAN, P.A.; TRAVERS, M.J.; MCCARTHY, M.C.; GOTTLIEB, C; THADDEUS, P. "Detection of HC'N in the Cold Dust Cloud TMC-1." ApJ 483: L61-L64,1997.

BENZ, A.O.; KRUCKER, S.; ACTON, L.W.; BASTIAN, T.S. "Fine Structure of the X-ray and Radio Emissions of the Quiet Solar Corona." A&A 320: 993-1000,1997.

BERKHUUSEN, E.M.; HORELLOU, C; KRAUSE, M.; NEININGER, N.; POEZD, A.D.; SHUKUROV, A.; SOKOLOFF, D.D. "Magnetic Fields in the Disk and Halo of M 51." A&A 318: 700-720,1997.

BEST, P.N.; LONGAIR, M.S.; ROTTGERING, H.J.A. "HST, Radio and Infrared Observations of 28 3CR Radio Galaxies at Redshift z ~ 1 -1. The Observations." MNRAS 292: 758-794,1997.

32 BIETENHOLZ, M.F.; KASSIM, N.; FRAIL, D.H.; PERLEY, R.A.; ERICKSON, W.C.; HAJIAN, A.R. "The Radio Spectral Index of the Crab Nebula." ApJ 490: 291-301,1997.

BLOEMHOF, E.E. "Radio Continuum Studies of a Sample of Herbig-Haro Objects in Orion." IAU Symp. 182 (poster vol): 60-62, 1997.

BOBOLTZ, D.A.; DIAMOND, P.J.; KEMBALL, AJ. "RAquarii: First Detection of Circumstellar SiO Maser Proper Motions." ApJ 487: L147-L150,1997.

BONTEMPS, S.; ANDRE, P. "An Asymmetric Radio Continuum HH-Jet from VLA1623." IAU Symp. 182 (poster vol): 63-65,1997.

BOSELLI, A.; GAVAZZI, G.; LEQUEUX, J.; BUAT, V.; CASOLI, F.; DICKEY, J.; DONAS, J. "The Molecular Gas Content of Spiral Galaxies in the Coma/A1367 Supercluster." A&A 327: 522-538,1997.

BOUGHN, S.P.; USON, J.M. "Multiband Photometry of Rich Abell Clusters: Constraints on the Dwarf Star Content of Dark Matter." ApJ 488: 44-54,1997.

BOWEN, D.V.; TOLSTOY, E.; FERRARA, A.; BLADES, J.C.; BRINKS, E. "The Absence of Diffuse Gas Around the Dwarf Spheroidal Galaxy Leo I." ApJ 478: 530-535,1997.

BOWER, G.C.; BACKER, D.C.; PLAMBECK, R.L.; WRIGHT, M.C.H. "Removal of Tropospheric Path Length Variations in Very Long Baseline Interferometry with Measurement of Tropospheric Emission." J. Geophys. Res. 102: 16773-16781,1997.

BOWER, G.C.; BACKER, D.C.; WRIGHT, M.; FORSTER, J.R.; ALLER, H.D.; ALLER, M.F. "A Dramatic Millimeter Wavelength Flare in the Gamma-Ray Blazar NRAO 530." In: Millimeter-VLBI Science Workshop (Haystack, ed. Barvainis & Phillips): 21-35, 1997.

BOWER, G.C.; BACKER, D.C.; WRIGHT, M.; FORSTER, J.R.; ALLER, H.D.; ALLER, M.F. "A Dramatic Millimeter Wavelength Flare in the Gamma-Ray Blazar NRAO 530." ApJ 484: 118-130,1997.

33 BRADSHAW, C.F.; FOMALONT, E.B.; GELDZAHLER, B.J. "The Distance and Milliarcsecond Radio Structure of Scorpius X-l." ApJ 484: L55-L58,1997.

BRADSHAW, C.F.; GELDZAHLER, B.J.; FOMALONT, E.B. "ScoX-1: Hints of Periodic Variability at Radio Frequencies." ApJ 481:489-499,1997.

BRAUN, R. "The Temperature and Opacity of Atomic Hydrogen in Spiral Galaxies." ApJ 484:637-655,1997.

BRIGGS, F.H.; BRINKS, E.; WOLFE, A.M. "Warm Neutral Gas at Redshift 3.4." AJ 113:467-473,1997.

BRINKS, E.; TAYLOR, C.L. "A Search for CO Emission from HE Galaxies." IAU Symp. 170 (poster vol, NRAO): 12-15,1997.

BRYCE, M.; PEDLAR, A.; MUXLOW, T.; THOMASSON, P.; MELLEMA, G. "New, Sub-O.l-Arcsec Radio Maps of Two Young Planetary Nebulae." MNRAS 284: 815-820,1997.

BRYCE, M.; PEDLAR, A.; MUXLOW, T.; THOMASSON, P.; MELLEMA, G.; MEABURN, J.; BAINS, I. "High-Resolution Observations of Young Planetary Nebulae." In: High-Sensitivity Radio Astronomy (Cambridge, ed. Jackson & Davis): 57-60,1997.

BURNS, J.O.; LOKEN, C; GOMEZ, P.; RIZZA, E.; BILTON, M.; LEDLOW, M.; OWEN, F.N. "tListening, to Cluster Cooling Flows: Radio Emission & the Cluster Environment." In: Galactic and Cluster Cooling Flows (ASP, ed. Soker): 21-30,1997.

BUTLER, B.J. "The Migration of Volatiles on the Surfaces of Mercury and the Moon." J. Geophys. Res. 102:19283-19291,1997.

BUTLER, B.J.; BEASLEY, A.J.; WROBEL, J.M.; PALMER, P. "The Occultation of the QSO J0237+2848 by Comet C/1996 B2 (Hyakutake)" AJ 113: 1429-1432,1997.

CARILLI, C.L.; MENTEN, K.M.; REID, M.J.; RUPEN, M.P. "Neutral Hydrogen 21 Centimeter Absorption at Redshift 0.673 Towards 1504+377." ApJ 474: L89-L93,1997.

CARILLI, C.L.; ROTTGERING, H.J.A.; VAN OJIK, R.; MILEY, G.K.; VAN BREUGEL, W.J.M. "Radio Continuum Imaging of High-Redshift Radio Galaxies." ApJS 109: 1-44,1997.

34 CARKNER, L.; MAMAJEK, E.; FEIGELSON, E.; NEUHAUSER, R.; WICHMANN, R.; KRAUTTER, J. "Radio Emission from ROSAT-Discovered Young Stars in and Around Taurus-Auriga." ApJ 490: 735-743,1997.

CHANDLER, C.J.; RICHER, J.S. "SiO in Protostellar Outflows." IAU Symp. 182 (poster vol): 76-78, 1997.

CHANDLER, C.J.; WOOD, D.O.S. "VLA Observations of 43-GHz Continuum and CS J=l-0 Emission from Orion—IRc2 and the Hot Core." MNRAS 287: 445-454,1997.

CHARNLEY, S.B.; LATTER, W.B. "Methane in Oxygen-Rich Circumstellar Envelopes: A Search for CHjOH and CCH." MNRAS 287: 538-542,1997.

CHATY, S.; MIRABEL, IF. "Infrared Observations and Energetic Outburst of GRS 1915+105." Compton Symp. 4: 917-921,1997.

CLAUSSEN, M.J.; FRAIL, D.A.; GOSS, W.M.; GAUME, R.A. "Polarization Observations of 1720 MHz OH Masers Toward the Three Supernova Remnants W28, W44, and IC 443." ApJ 489: 143-159, 1997.

CLAUSSEN, M.J.; MARVEL, K.B.; WOOTTEN, H.A.; WILKING, B.A. "Water Masers Toward Low-Luminosity Young Stellar Objects." IAU Symp. 182: 515-524,1997.

CODELLA, C; TESTI, L.; CESARONI, R. "The Molecular Environment of H20 Masers: VLA Ammonia Observations." A&A 325: 282-294,1997.

COHEN, M.H.; VERMEULEN, R.C.; OGLE, P.M.; TRAN, H.D.; GOODRICH, R.W. "PKS 0116+082: An Optically Variable Compact Steep-Spectrum Source in a Narrow-Line Radio Galaxy." ApJ 484: 193-201,1997.

COMBES, F.; WKLIND, T.; NAKAI, N. "New Upper Limits on the Interstellar 02 Abundance." A&A 327: L17-L20,1997.

CONDON, J.J. "Errors in Elliptical Gaussian Fits." PASP 109: 166-172,1997.

CONTRERAS, M.E.; RODRIGUEZ, L.F.; TAPIA, M.; CARDINI, D.; BADIALI, M.; EMANUELE, A.; PERSI, P. "Hipparcos, VLA and CCD Observations of Cyg OB2 No. 5." In: Hipparcos Venice 97 (ESA SP-402, ed. Battrick): 401-403,1997.

35 CONTRERAS, M.E.; RODRIGUEZ, L.F.; TAPIA, M.; CARDINI, D.; EMANUELE, A.; BADIALI, M.; PERSI, P. "Hipparcos, VLA, and CCD Observations of Cygnus OB2 No. 5: Solving the Mystery of the Radio 'Companion'" ApJ 488: L153-L156,1997.

CORNETT, R.H; GREASON, M.R.; HILL, J.K.; PARKER, J.W.; WALLER, W.H.; BOHLIN, R.C.; CHENG, K.-P.; NEFF, S.G.; O'CONNELL, R.W.; ROBERTS, M.S.; SMITH, A.M.; STECHER, T.P. "UTT: Ultraviolet Observations of the Small Magellanic Cloud." AJ 113: 1011-1021,1997.

CORNWELL, T.; WIERINGA, M. "The Design and Implementation of Synthesis Calibration and Imaging in AIPS++" ADASS 6: 10-17,1997.

COTTON, W.D.; COTTON, J.E.; HUNT, A.P. "Social Behavior of Cretaceous Omithopod Dinosaurs of New Mexico." In: New Mexico Museum of Natural History and Science Bulletin 11:45-50,1997.

COTTON, W.D.; DALLACASA, D.; FANTI, C; FANTI, R.; FOLEY, A.R.; SCHILIZZI, R.T.; SPENCER, R.E. "Dual Frequency VLBI Polarimetric Observations of 3C 138." A&A 325:493-501,1997.

COTTON, W.D.; FANTI, C; FANTI, R.; DALLACASA, D.; FOLEY, A.R.; SCHILIZZI, R.T.; SPENCER, R.E. "VLBA Polarimetric Observations of 3C 286 at 5 GHz." A&A 325: 479-483,1997.

DAHLEM, M.; PETR,M.G.;LEHNERT,M.D.; HECKMAN,T.M.; EHLE,M. "EvidenceforaNew 'Superwind' Galaxy-NGC4666." A&A 320: 731-745,1997.

DAW, E.; BRADLEY, R.F. "Effects of High Magnetic Fields on the Noise Temperature of a Heterostructure Field-Effect Transistor Low-Noise Amplifier." J Appl. Phys. 82: 1925-1929,1997.

DE OLIVEIRA-COSTA, A.; KOGUT, A.; DEVLIN, M.J.; NETTERFIELD, C.B.; PAGE, L.A.; WOLLACK, E.J. "Galactic Microwave Emission at Degree Angular Scales." ApJ 482: L17-L20,1997.

DE PATER, I.; SCHULZ, M.; BRECHT, S.H. "Synchrotron Evidence for Amalthea's Influence on Jupiter's Electron Radiation Belt." J. Geophys. Res. 102: 22043-22064,1997.

DE PATER, L; VAN DER TAK, F.; STROM, R.G.; BRECHT, S.H. "The Evolution of Jupiter's Radiation Belts after the Impact of Comet D/Shoemaker-Levy 9." Icarus 129: 21-47,1997.

36 DE PREE, C.G.; MEHRINGER, D.M.; GOSS, W.M. "Multifrequency, High-Resolution Radio Recombination Line Observations of the Massive Star-Forming Region W49A." ApJ 482: 307-333,1997.

DE RUTTER, H.R.; ZAMORANI, G.; PARMA, P.; HASINGER, G.; HARTNER, G.; TRUMPER, J.; BURG, R.; GIACOMMI, R.; SCHMIDT, M. "Deep Radio Observations of the 'Lockman Hole'" A&A 319: 7-17,1997.

DEEG, H.-J,; DURIC, N.; BRINKS, E. "Star Formation Histories in H n Galaxies. I. Optical and Radio Observations." A&A 323: 323-336,1997.

DENNETT-THORPE, J.; BRIDLE, A.H.; SCHEUER, P.A.G.; LAING, R.A.; LEAHY, J.P. "Asymmetry of Jets, Lobe Length and Spectra Index in Quasars." MNRAS 289: 753-765,1997.

DEVEREUX, N.A.; DURIC, N.; SCOWEN, P.A. "H a Far-Infrared and Thermal Radio Continuum Emission Within the Late-Type Spiral Galaxy M33." AJ 113: 236-248,1997.

DEVEREUX, N.; DURIC, N.; SCOWEN, P. "H a. Far Infrared and Thermal Radio Continuum Emission Within the Late-Type Spiral Galaxy M33." In: Star Formation Near and Far (AIP, ed. Holt & Mundy): 518-521,1997.

DI FRANCESCO, J.; EVANS, N.J. H; HARVEY, P.M.; MUNDY, L.G.; GUILLOTEAU, S.; CHANDLER, C.J. "Millimeter and Radio Interferometry of Herbig Ae/Be Stars." ApJ 482:433-441,1997.

DIAMOND, P.J.; KEMBALL, A.J.; BOBOLTZ, D.A. "VLBA Polarization Monitoring of SiO Masers Towards Late-Type Stars." Vistas Astron. 41:175-178,1997.

DICKEL, H.R.; ROBERTS, D.A.; GOSS, W.M. "DR21: Highlights Over 25 Years." IAU Symp. 170 (poster vol., NRAO): 16-19, 1997.

DICKENS, J.E.; IRVINE, W.M.; DEVRIES, C.H.; OHISHI, M. "Hydrogenation of Interstellar Molecules: A Survey for Methylenimine (CH2NH)" ApJ 479: 307-312,1997. DICKEY, J.M. "A VLA Survey of the Hercules Cluster. I. The HI Data." AJ 113: 1939-1972,1997.

37 DIGEL, S.W.; DE GEUS, E.J.; HENKEL, C; HUTTEMEISTER, S.; THADDEUS, P. "Multitransition Observations of Molecular Clouds in the Far Outer Galaxy." IAU Symp. 170 (poster vol., NRAO): 20-24,1997.

DJORGOVSKI, S.G.; KULKARNI, S.R.; GAL, R.R.; ODEWAHN, S.C.; FRAIL, D.A. "GRB 970228." IAU Circ 6732:4 September 1997.

DJORGOVSKI, S.G.; METZGER, M.R.; KULKARNI, S.R.; ODEWAHN, S.C.; GAL, R.R.; PAHRE, M.A.; FRAIL, D.A.; COSTA, E.; FEROCI, M.; BEPPOSAX TEAM. "GRB 970508." IAU Circ. 6660: 13 May 1997.

DJORGOVSKI, S.G.; METZGER, M.R.; ODEWAHN, S.C.; GAL, R.R.; KULKARNI, S.R.; PAHRE, M.A.; FRAIL, D.A.; COSTA, M.; BEPPOSAX TEAM. "GRB 970508." IAU Circ 6655; 11 May 1997.

DJORGOVSKI, S.G.; ODEWAHN, S.C.; GAL, R.R.; METZGER, M.R.; KULKARNI, S.R.; PAHRE, M.A.; FRAIL, D.A.; COSTA, E.; FEROCI, M.; BEPPOSAX TEAM. "GRB 970508." IAU Circ, 6658,12 May 1997.

DOELEMAN, S.S.; CLAUSSEN, M. "Evolution of a New Radio Flare in N-Galaxy 3C111." In: MilUmeter-VLBI Science Workshop (Haystack, ed. Barvainis & Phillips): 37-41,1997.

DORMAN, B.; SHAH, R.Y.; O'CONNELL, R.W.; LANDSMAN, W.B.; ROOD, R.T.; BOHLIN, R.C.; NEFF, S.G.; ROBERTS, M.S.; SMITH, A.M.; STECHER, T.P. "UTT Detection of Hot Stars in the Globular Cluster NGC 362." ApJ 480: L31-L34,1997.

DRINKWATER, M.J.; WEBSTER, R.L.; FRANCIS, P.J.; CONDON, J.J.; ELLISON, S.L.; JAUNCEY, D.L.; LOVELL, J.; PETERSON, B.A.; SAVAGE, A. "The Parkes Half-Jansky Flat-Spectrum Sample." MNRAS 284: 85-125,1997.

DUC, P.-A.; BRINKS, E.; WINK, J.E.; MIRABEL, I.F. "Gas Segregation in the Interacting System Arp 105." A&A 326: 537-553, 1997.

EMERSON, D.T. "Increasing the Yield of Our Telescopes." IAU Symp. 170:207-214,1997.

EMERSON, D.T. "The Work of Jagadis Chandra Bose: 100 Years of Mm-Wave Research." IEEE Tr. MTT 45: 2267-2273,1997.

EMERSON, D.T. "The Works of Jagadis Chandra Bose: 100 Years of Mm-Wave Research." IEEE MTT-S Int. Microwave Symp.: 553-556,1997.

38 ENGELS, D.; WINNBERG, A.; WALMSLEY, CM.; BRAND, J. "Mode Switching of the Water Maser in OH 39.7+1.5." A&A 322: 291-295, 1997.

ENGLISH, J.; IRWIN, J.A. "The Ionized Gas and Radio Halo of NGC 3432 (Arp 206)" AJ 113: 2006-2024, 1997.

ESTALELLA, R.; GIRART, J.M.; ANGLADA, G.; TORRELLES, J.M.; HO, P.T.P.; RODRIGUEZ, L.F. "The Powering Sources of the Quadrupolar Molecular Outflow in L723." IAU Symp. 182 (poster vol): 266-268,1997.

FANELLI, M.N.; COLLINS, N.; BOHLIN, R.C.; NEFF, S.G.; O'CONNELL, R.W.; ROBERTS, M.S.; SMITH, A.M.; STECHER, T.P. "An Ultraviolet View of Massive Star Formation in Seyfert Host Galaxies." AJ 114: 575-584, 1997.

FANELLI, M.N.; MARCUM, P.M.; WALLER, W.H.; CORNETT, R.H.; O'CONNELL, R.W.; ROBERTS, M.S.; BOHLIN, R.C.; NEFF, S.G.; SMITH, A.S.; STECHER, T.P. "Spatially-Resolved Far-UV Properties of Disk Galaxies." In: Ultraviolet Universe at Low and High Redshift (AIP, ed Waller et al): 83-87,1997.

FANELLI, M.N.; WALLER, W.W.; SMITH, D.A.; FREEDMAN, W.L.; MADORE, B.; NEFF, S.G.; O'CONNELL, R.W.; ROBERTS, M.S.; BOHLIN, R.; SMITH, A.M.; STECHER, T.P. "An Ultraviolet and Near-Infrared View of NGC 4214: A Starbursting Core Embedded in a Low Surface Brightness Disk." ApJ 481: 735-740,1997.

FANG, F.; SASLAW, W.C. "Effects of Galaxy Mergers on Their Spatial Distribution and Luminosity Function." ApJ 476: 534-543, 1997.

FENDER, R.P.; BELL BURNELL, S.J.; WALTMAN, E.B.; POOLEY, G.G.; GHIGO, F.D.; FOSTER, R.S. "Cygnus X-3 in Outburst: Quenched Radio Emission, Radiation Losses and Variable Local Opacity." MNRAS 288: 849-858,1997.

FERETTI, L.; GIOVANNINI, G.; BOHRINGER, H. "The Radio and X-ray Properties of Abell 2319." New Ast. 2: 501-515,1997.

FERNANDEZ, Y.R.; KUNDU, A.; LISSE, CM.; AIIEARN, M.F. "X-Band VLA Observations of Comet Hyakutake (C/1996 B2) and Implications for Nuclear Properties." Planet Space Sci. 45: 735-739,1997.

FERNINI, I.; BURNS, J.O.; PERLEY, R.A. "VLA Imaging of Fanaroff-Riley H 3CR Radio Galaxies. H. Eight New Images and Comparisons with 3CR Quasars." AJ 114: 2292-2312,1997.

39 FERRARIO, L.; WICKRAMASINGHE, D.T.; LDEBERT, J.; SCHMIDT, G.D.; BDEGING, J.H. "The Magnetic Field and Emission-Line Spectrum of the Remarkable White Dwarf GD 356." MNRAS 289:105-116,1997.

FEY, A.L.; CHARLOT, P. "VLBA Observations of Radio Reference Frame Sources. IL Astrometric Suitability Based on Observed Structure." ApJS 111: 95-142,1997.

FEY, A.L.; EUBANKS, T.M.; KINGHAM. K.A. "The Proper Motion of 4C 39.25." AJ 114: 2284-2291,1997.

FISHER, J.R. "Hazards and Future Improvements to HI Surveys." PASA 14:96-98,1997.

FOLKNER, W.M.; PRESTON, R.A.; BORDER, J.S.; NAVARRO, J.; WILSON, W.E.; OESTREICH, M. "Earth-Based Tracking of the Galileo Probe for Jupiter Wind Estimates." Science 275:644-646,1997.

FOMALONT, E.B.; GOSS, W.M.; MANCHESTER, R.N.; LYNE, A.G. "Improved Proper Motions for Pulsars from VLA Observations." MNRAS 286: 81-84,1997.

FOMALONT, E.B.; KELLERMANN, K.I.; RICHARDS, E.A.; WINDHORST, R.A.; PARTRIDGE, R.B. "Radio Emission from Objects in the Hubble Deep Field." ApJ 475: L5-L7,1997.

FRAIL, D.A.; BIETENHOLZ, M.F.; MARKWARDT, C.B.; OGELMAN, H. "A Radio/X-ray Comparison of the Vela X Region." ApJ 475: 224-230,1997.

FRAIL, D.A.; KULKARNI, S.R. "GRB 970828." IAU Circ 6730: 1 September 1997.

FRAIL, D.A.; KULKARNI, S.R.; BEPPOSAX TEAM "GRB 970508." IAU Circ 6662: 15 May 1997. FRAIL, D.A.; KULKARNI, S.R.; COSTA, E.; FEROCI, M.; PIRO, L.; NICASTRO, L.; DAL FIUME, D.; PALAZZI, R.; FRONTERA, F.; JAGER, R.; HEISE, J. "GRB 970228." IAU Circ. 6576: 6 March 1997.

FRAIL, D.A.; KULKARNI, S.R.; COSTA, E.; FRONTERA, F.; HEISE, J.; FEROCI, M.; PIRO, L.; DAL FIUME, D.; NICASTRO, L.; PALAZZI, E.; JAGER, R. "Radio Monitoring of the 1997 January 11 Gamma-Ray Burst." ApJ 483: L91-L94,1997.

40 FRAIL, D.A.; KULKARNI, S.R.; NICASTRO, L.; DAL FIUME, D.; ORLANDINI, M.; PALAZZI, E.; PIZZICHINI, G.; FRONTERA, F.; ZAVATTINI, G.; AMATI, L.; CDSTTI, M.N.; COSTA, E.; FEROCI, M.; PIRO, L.; JAGER, R.; HEISE, J. "GRB 970111." IAU Circ. 6545: 24 January 1997.

FRAIL, D.A.; KULKARNI, S.R.; NICASTRO, L.; FEROCI, M.; TAYLOR, G.B. "The Radio Afterglow from the y-ray Burst of 8 May 1997." Nature 389: 261-263,1997.

FRAIL, D.A.; SCHARRINGHAUSEN, B.R. "A Radio Survey for Pulsar Wind Nebulae." ApJ 480: 364-370, 1997.

FRAIL, D.A.; VASISHT, G.; KULKARNI, S.R. "The Changing Structure of the Radio Nebula Around the Soft y-Ray Repeater SGR 1806-20." ApJ480:L129-L132,1997.

FRAYER, D.T.; BROWN, R.L. "Evolution ofthe Abundance ofCO,02, and Dust in the Early Universe." ApJS 113:221-243,1997.

FRAYER, D.T.; PAPADOPOULOS, P.P.; BECHTOLD, J.; SEAQUIST, E.R.; YEE, H.K.C.; SCOVILLE, N.Z. "Constraining the Molecular Gas Reservoir Associated With the Protogalaxy Candidate MS1512-cB58." AJ 113: 562-568,1997.

FRENCH, J.C.; POWELL, A.L.; SCHULMAN, E. "Applications of Approximate Word Matching in Information Retrieval." In: Int Conf. Information and Knowledge Management 6 (ACM, ed. Golshani & Makki): 9-15,1997.

FRENCH, J.C.; POWELL, A.L.; SCHULMAN, E.; PFALTZ, J.L. "Automating the Construction of Authority Files in Digital Libraries: A Case Study." In: Research and Advanced Technology for Digital Libraries (Springer, ed. Peters & Thanos): 55-71,1997.

FREY, S.; GURVTTS, L.I.; KELLERMANN, K.I.; SCHILIZZI, R.T.; PAULINY-TOTH, I.I.K. "High Resolution Radio Imaging ofthe Extremely Distant Quasars 1251-407,1351-018,1354-174, and 1508+572." A&A 325: 511-515,1997.

GABUZDA, D.C.; KOCHANEV, P.Y. "VLBI Polarization Observations of Intraday Variability." Vistas Astron. 41: 219-223,1997.

GALLETTA, G.; SAGE, L.J.; SPARKE, L.S. "Molecular Gas in Polar-Ring Galaxies." MNRAS 284: 773-784,1997.

GALLIMORE, J.; BAUM, S.; O'DEA, C. "A Direct Image ofthe Inner Torus of NGC 1068." Ap&SS 248: 253-260,1997.

41 GALLIMORE, J.F.; BAUM, S.A.; O'DEA, C.P. "A Direct Image ofthe Obscuring Disk Surrounding an Active Galactic Nucleus." Nature 388: 852-854,1997. GAO, Y.; SOLOMON, P.M.; DOWNES, D.; RADFORD, SJ.E. "Molecular Gas in the Spectacular Ring Galaxy NGC 1144." ApJ 481: L35-L38,1997. GARRETT, M.A.; NAIR, S.; PORCAS, R.W.; PATNAIK, A.R. "Multi-Epoch VLBA 15 and 43 GHz Observations ofthe Gravitational Lens PKS 1830-211: Extending VLBI Towards the Micro-Arcsecond Scale." Vistas Astron. 41: 281-285,1997.

GE, J.; BECHTOLD, J.; WALKER, C; BLACK, J.H. "Spectroscopy of PKS 0528-250: New Limits on CO Absorption and Emission." ApJ 486: 727-737,1997.

GENSHEIMER, P.D. "Detection of HCCNC from IRC+10216." ApJ 479: L75-L78,1997.

GENSHEIMER, P.D.; SNYDER, L.E. "A Search For Vibrationally Excited SiC2 v3 = 1 Toward IRC+10216." ApJ 490: 819-822, 1997.

GIACANI, E.B.; DUBNER, G.M.; KASSIM, N.E.; FRAIL, D.A.; GOSS, W.M.; WINKLER, P.F.; WILLIAMS, B.F. "New Radio and Optical Study of the Supernova Remnant W44." AJ 113:1379-1390,1997. GIOVANNINI, G.; COTTON, W.D.; FERETTI, L.; LARA, L.; VENTURI, T. "VLBI Observations of Low-Power Radio Galaxies." In: High-Sensitivity Radio Astronomy (Cambridge, ed. Jackson & Davis): 157-160,1997.

GIRART, J.M.; ESTALELLA, R.; ANGLADA, G.; TORRELLES, J.M.; HO, P.T.P.; RODRIGUEZ, L.F. "The Ammonia Core in L723: Hot Spots at the Center ofthe Quadrupolar Molecular Outflow." ApJ 489: 734-743,1997. GLENN, J.; WALKER, C.K.; BDEGING, J.H.; JEWELL, P.R. "Millimeter-Wave Spectropolarimetry of Evolved Stars: Evidence for Polarized Molecular Line Emission." ApJ 487: L89-L92,1997. GLENN, J.; WALKER, C.K.; JEWELL, P.R. "HCO+ Spectropolarimetry and Millimeter Continuum Polarimetry of the DR 21 Star-Forming Region." ApJ 479: 325-331,1997.

42 GOMEZ, P.L.; PINKNEY, J.; BURNS, J.O.; WANG, Q.; OWEN, F.N.; VOCES, W. "ROSAT X-ray Observations of Abell Clusters with Wide-Angle Tailed Radio Sources." ApJ 474: 580-597,1997.

GOMEZ, Y.; RODRIGUEZ, L.F.; MIRABEL, I.F. "Candidate Planetary Nebulae Near the Galactic Center." Rev. Mex. Astron. Astrof. 33: 25-30,1997.

GOPALSWAMY, N.; ZHANG, J.; KUNDU, M.R.; SCHMAHL, E.J.; LEMEN, J.R. "Fast Time Structure During Transient Microwave Brightenings: Evidence for Nonthermal Processes." ApJ 491: LI 15-L119,1997.

GORDON, M.A.; MUSSER, G.S. "Cold Heart ofthe Cosmos." Mercury 21 (1): 14-19,1997.

GREEN, A.J.; FRAIL, D.A.; GOSS, W.M.; OTRUPCEK, R. "Continuation of a Survey of OH (1720 MHz) Maser Emission Towards Supernova Remnants." AJ 114: 2058-2067,1997.

GREENHILL, L.J.; HERRNSTEIN, J.R.; MORAN, J.M.; MENTEN, K.M.; VELUSAMY, T. "A Search for H20 Maser Emission Toward Active Galactic Nuclei: Discovery of a Nuclear Maser Source in NGC 3735." ApJ 486: L15-L18,1997.

GREENHILL, L.J.; MORAN, J.M.; HERRNSTEIN, J.R. "The Distribution of H20 Maser Emission in the Nucleus of NGC 4945." ApJ481:L23-L26,1997.

GWINN, C.R.; OJEDA, M.J.; BRTTTON, M.C.; REYNOLDS, J.E.; JAUNCEY, D.L.; KING, E.A.; MCCULLOCH, P.M.; LOVELL, J.E.J.; FLANAGAN, C.S.; SMITS, D.P.; PRESTON, R.A.; JONES, D.L. "Size ofthe Vela Pulsar's Radio Emission Region: 500 Kilometers." ApJ 483: L53-L56, 1997.

HAARSMA, D.B.; HEWITT, J.N.; LEHAR, J.; BURKE, B.F. "The 6 Centimeter Light Curves of B0957+561, 1979-1984: New Features and Implications for the Time Delay." ApJ 479: 102-118,1997.

HALDEMANN, A.F.C.; MUHLEMAN, D.O.; BUTLER, B.J.; SLADE, M.A. "The Western Hemisphere of Venus: 3.5 cm Dual Circular-Polarization Radar Images." Icarus 128: 398-414,1997.

HARDCASTLE, MJ.; ALEXANDER, P.; POOLEY, G.G.; RILEY, J.M. "High Resolution Observations at 3.6 cm of Seventeen FR H Radio Galaxies with 0.15 < z < 0.3." MNRAS 288: 859-890, 1997.

43 HARDCASTLE, M.J.; ALEXANDER, P.; POOLEY, G.G.; RILEY, J.M. "The Jets in 3C 296." MNRAS 288: L1-L6,1997.

HARMON, B.A.; DEAL, K.J.; PACIESAS, W.S.; ZHANG, S.N.; ROBINSON, C.R.; GERARD, E.; RODRIGUEZ, L.F.; MIRABEL, I.F. "Hard X-ray Signature of Plasma Ejection in the Galactic Jet Source GRS 1915+105." ApJ 477: L85-L89,1997.

HARRINGTON, J.P.; LAME, N.J.; WHITE, S.M.; BORKOWSKI, K.J. "High-Resolution Imagery of BD +30° 3630 and Its Dusty Halo." AJ 113: 2147-2157,1997.

HARVANEK, M.; STOCKE, J.T.; MORSE, J.A.; RHEE, G. "High Dynamic Range VLA Observations ofthe Gravitationally Lensed Quasar 0957+561." AJ 114: 2240-2253,1997.

HELPER, T.T.; BLITZ, L. "Dense Gas in the Milky Way." ApJ 478: 233-245,1997.

HELPER, T.T.; BLITZ, L. "Synthesis Imaging of Dense Gas in Nearby Galaxies." ApJ 478:162-171,1997.

HENNING,P.A. "HI Searches in the Zone of Avoidance: Past and Present (and Future)" PASA 14: 21-24,1997.

HERRNSTEIN, J.R.; MORAN, J.M.; GREENHILL, L.J.; DIAMOND, P.J.; MIYOSHI, M.; NAKAI, N.; INOUE, M. "Discovery of a Subparsec Jet 4000 Radii Away from the Central Schwarzschild Engine of NGC 4258." ApJ 475: L17-L20,1997.

HESLER, J.L.; CROWE, T.W.; BISHOP, W.L.; WEDCLE, R.M. H; BRADLEY, R.F.; PAN, S.-K. "The Development of Planar Schottky Diode Waveguide Mixers at Submillimeter Wavelengths." IEEE MTT-S Int Microwave Symp.: 953-956,1997.

HIGDON, J.L.; RAND, R.J.; LORD, S.D. 'The Detection of Massive Molecular Complexes in the Ring Galaxy System Arp 143." ApJ 489: L133-L136,1997.

HILL, J.K.; WALLER, W.H.; CORNETT, R.H.; BOHLIN, R.C.; CHENG, K.-P.; NEFF, S.G.; O'CONNELL, R.W.; ROBERTS, M.S.; SMITH, A.M.; HINTZEN, P.M.N.; SMITH, E.P.; STECHER, T.P. "Ultraviolet Colors and Extinctions of H H Regions in the Whirlpool Galaxy (M51)" ApJ 477: 673-678,1997.

HILL, R.S.; FANELLI, M.N.; SMITH, D.A.; BOHLIN, R.C.; NEFF, S.G.; O'CONNELL, R.W.; ROBERTS, M.S.; SMITH, A.M.; STECHER, T.P. "UTT Astro-2 Observations of NGC 4449." In: Star Formation Near and Far (AIP, ed. Holt & Mundy): 594-597, 1997.

44 HINKLE, K.H.; LEBZELTER, T.; SCHARLACH, W.W.G. "Infrared Velocities of Long Period Variables: CO Av=3 in Four Miras and Five SR Variables." AJ 114: 2686-2699,1997.

HJELLMING, R.M. "Imaging Relativistic Radio Jets and the X-ray-Radio Connection in X-ray Transients." IAU Colloq. 163: 53-62, 1997.

HJELLMING, R.M. "XTE J1739-302." IAU Circ. 6750: 3 October 1997.

HJELLMING, R.M.; RUPEN, M.P. "XTE J1709-267." IAU Circ. 6547: 27 January 1997.

HOLLIS, J.M.; PEDELTY, J.A.; KAFATOS, M. "Lateral Shock ofthe Aquarii Jet." ApJ 490: 302-310,1997.

HOLLIS, J.M.; PEDELTY, J.A.; LYON, R.G. "Spatial Resolution ofthe R Aquarii Binary System." ApJ 482: L85-L88,1997.

HOWELL, S.B.; PESCE, J.E.; CONDON, J.J.; CIARDULLO, R.; USHER, P.D. "US 3215: An Active gE2 Galaxy." PASP 109: 1149-1153,1997.

HUGHES, P.; MIODUSZEWSKI, A.; DUNCAN, C. "Relativistic Jet Simulations and VLBI Maps." In: Computational Astrophysics (ASP, ed. Clarke & West): 284-289,1997.

HUGHES, V.A. "An Evolving Radio Source in the Young Star-Forming Region Cepheus A." ApJ 481: 857-865,1997.

HUGHES, V.A. "Jets in the Star Forming Region Cepheus A." IAU Symp. 182 (poster vol.): 141-143, 1997.

HUGHES, V.A. "Variable Sources and Jets in Cepheus A." In: High-Sensitivity Radio Astronomy (Cambridge, ed. Jackson & Davis): 42-45,1997.

HUMMEL, C.A.; KRICHBAUM, T.P.; WTTZEL, A.; WULLNER, K.H.; STEFFEN, W.; ALEF, W.; FEY, A. "The Radio Jet of Quasar 0153+744." A&A 324: 857-869,1997.

HUTCHINSON, J.M.; CAWTHORNE, T.V. "A Polarization Study of Quasar 4C71.07." Vistas Astron. 41: 231-235,1997.

45 HUTTER, D.J.; ELIAS, N.M. H; PETERSON, E.R.; WEAVER, W.B.; WEAVER, G.; MOZURKEWICH, D.; VRBA, F.J.; SIMON, R.S.; BUSCHER, D.F.; HUMMEL, CA. "Seeing Tests at Four Sites in Support ofthe NPOI Project." AJ 114: 2822-2833,1997.

IRWIN, J.A.; FRAYER, D.T.; SARAZIN, C.L. "Is There Molecular Gas in the HI Cloud Between NGC 4472 and UGC 7636?" AJ 113:1580-1584,1997.

IRWIN, J.A.; FRAYER, D.T.; SARAZIN, C.L. "The Search for Molecular Gas in the HI Cloud Between UGC 7636 and the Cooling Flow Galaxy NGC 4472." In: Galactic and Cluster Cooling Flows (ASP, ed. Soker): 75-81,1997.

JACOB, A.P.; BEDDING, T.R.; ROBERTSON, J.G.; MARSON, R.G.; BARTON, J.R.; HANIFF, CA. "Wavelength-Dependent Stellar Diameters Using MAPPTT." IAU Symp. 189 (poster vol): 10-13,1997.

JACOBSON, A.; SRAMEK, R. "A Method for Improved Microwave-Interferometer Remote Sensing of Convective Boundary Layer Turbulence Using Water Vapor as a Passive Tracer." Radio Sci. 32:1851-1860,1997.

JOHNSTON, K.J.; GAUME, R.A.; WILSON, T.L.; NGUYEN, H.A.; NEDOLUHA, G.E. "The Apparent Sizes ofthe 62 - 6, E-Type Methanol Masers in OMC-1." ApJ 490: 758-764,1997.

JONES, D.L.; TINGAY, S.J.; JAUNCEY, D.L.; PRESTON, R.A.; REYNOLDS, J.E.; MEIER, D.L.; MURPHYL, D.W.; TZIOUMIS, A.K.; MCKAY, D.J.; KESTEVEN, M.J.; LOVELL, J.E.J.; CAMPBELL-WILSON, D.; ELLINGSEN, S.P.; GOUGH, R.; HUNSTEAD, R.W.; MCCULLOCH, P.M.; MIGENES, V.; QUICK, J.; SINCLAIR, M.W.; SMTTS, D. "VLBI Imaging of GRO J1655-40 with the SHEVE Array." Vistas Ast 41: 27-31,1997.

JONES, D.L.; WEHRLE, A.E. "VLBI Imaging of NGC 4261: Symmetric Parsec-Scale Jets and the Inner Accretion Region." ApJ 484: 186-192,1997.

JURA, M.; TURNER, J.; BALM, S.P. "Big Grains in the Red Rectangle?" ApJ 474: 741-748,1997.

KASPI, V.M.; BAILES, M.; MANCHESTER, R.N.; STAFFERS, B.W.; SANDHU, J.S.; NAVARRO, J.; D'AMICO, N. "Discovery ofthe Young, Energetic Radio Pulsar PSR Jl 105-6107." ApJ 485: 820-825,1997.

KASPI, V.M.; BAILES, M.; MANCHESTER, R.N.; STAFFERS, B.W.; SANDHU, J.S.; NAVARRO, J.; D'AMICO, N. "Discovery ofthe Young, Energetic Radio Pulsar PSR Jl 105-6107." Compton Symp. 4: 602-606,1997.

46 KATZ, C.A.; MOORE, C.B.; HEWITT, J.N. "Multifrequency Radio Observations ofthe Gravitational Lens System MG 0414+0534." ApJ 475: 512-518,1997.

KATZ-STONE, D.M.; RUDNICK, L. "An Analysis ofthe Synchrotron Spectrum in the Fanaroff-Riley Type I Galaxy 3C 449." ApJ 488: 146-154,1997.

KATZ-STONE, D.M.; RUDNICK, L. "A Spectral Analysis of Two Compact Steep-Spectrum Sources." ApJ 479: 258-267,1997.

KAUFMAN, M.; BRINKS, E.; ELMEGREEN, D.M.; THOMASSON, M.; ELMEGREEN, B.G.; STRUCK, C; KLARIC, M. "Observations ofthe Ocular Galaxy NGC 2535 and Its Starburst Companion NGC 2536." AJ 114: 2323-2349,1997.

KEDZIORA-CHUDCZER, L.; JAUNCEY, D.L.; WIERINGA, M.H.; WALKER, M.A.; NICOLSON, G.D.; REYNOLDS, J.E.; TZIOUMIS, A.K. "PKS 0405-385: The Smallest Radio Quasar?" ApJ 490: L9-L12,1997.

KELLERMANN, K.I. "Radio Astronomy in the 21st Century." Sky Tel. 93 (2): 26-33,1997.

KELLERMANN, K.I.; FOMALONT, E.B.; RICHARDS, E.A.; WINDHORST, R.A.; PARTRIDGE, R.B. "A VLA Survey ofthe Hubble Deep Field." In: Hubble Space Telescope and the High Redshift Universe (World, ed. Tanvir et al): 107-110,1997.

KELLERMANN, K.I.; ZENSUS, J.A.; COHEN, M.H. "A New Limit to the Central Mass Density of NGC 5128." ApJ 475: L93-L95, 1997.

KEMBALL, A.J.; DIAMOND, P.J. "Imaging the Magnetic Field in the Atmosphere of TX Camelopardalis." ApJ 481: LI 11-L114, 1997.

KING, L.J.; BROWNE, I.W.A.; MUXLOW, T.W.B.; NARASHIMA, D.; PATNAIK, A.R.; PORCAS, R.W.; WILKINSON, P.N. "Multifrequency Radio Observations ofthe Gravitational Lens System 1938+666." MNRAS 289:450-456,1997.

KOBULNICKY, C; SKILLMAN, E.; ROY, J.-R.; WALSH, J.R.; ROSA, M.R. "Induced Star Formation and Chemical Enrichment in NGC 5253." In: Star Formation Near and Far (AIP, ed. Holt & Mundy): 586-589,1997.

KOO, B.-C "H121 Centimeter Absorption Line Study ofthe W51 Complex." ApJS 108:489-502,1997.

47 KOO, B.-C; MOON, D.-S. "Interaction Between the W51C Supernova Remnant and a Molecular Cloud. I. H121 Centimeter Line Observations." ApJ 475: 194-210,1997.

KOO, B.-C; MOON, D.-S. "Interaction Between the W51C Supernova Remnant and a Molecular Cloud. II. Discovery of a Shocked CO and HCO+" ApJ 485:263-269,1997.

KRAEMER, K.E.; JACKSON, J.M.; PAGLIONE, T.A.D.; BOLATTO, A.D. "A 2000 M0 Rotating Molecular Disk Around NGC 6334A." ApJ 478: 614-623,1997.

KRICHBAUM, T.P.; WTTZEL, A.; GRAHAM, D.; LOBANOV, A. "MM-VLBI Monitoring of Broad-Band Active Blazars." In: Millimeter-VLBI Science Workshop (Haystack, ed. Barvainis & Phillips): 3-9,1997.

KRUCKER, S.; BENZ, A.O.; ASCHWANDEN, M.J. "Yohkoh Observation ofthe Source Regions of Solar Narrowband, Millisecond Spike Events." A&A 317: 569-579,1997.

KRUCKER, S.; BENZ, A.O.; BASTIAN, T.S.; ACTON, L.W. "X-ray Network Flares ofthe Quiet Sun." ApJ 488:499-505,1997.

KUKULA,M.J.;DUNLOP,J.S.; HUGHES, D.H.; RAWLINGS, S. "The Radio Properties of Radio-Quiet Quasars." In: Quasar Hosts (Springer, ed. Clements & Perez-Foumon): 185-187,1997.

KULKARNI, S.R.; CLEMENS, J.C; SIVARAMAKRISHNAN, A.; FRAIL, D.A. "Supernova 1997ct in Anonymous Galaxy." IAU Circ 6690: 1 July 1997.

KULKARNI, S.R.; ODEWAHN, S.C; DJORGOVSKI, S.G.; FRAIL, D.A.; GOODRICH, R.F.; MAXFIELD, L.M. "GRB 970815." IAU Circ. 6723: 26 August 1997.

KUTNER, M.L.; RUBIO, M.; BOOTH, R.S.; BOULANGER, F.; DE BRAAUW, T.; GARAY, G.; ISRAEL, F.P.; JOHANSSON, L.E.B.; LEQUEUX, J.; NYMAN, L.-A. "Results of the ESO-SEST Key Programme: CO in the Magellanic Clouds. IV. The 30 Doradus Complex." A&AS 122: 255-266,1997.

LACEY, C; DURIC, N.; GOSS, W.M. "A Survey of Compact Radio Sources in NGC 6946." ApJS 109:417-460,1997.

48 LADA, E.A.; EVANS, N.J. H; FALGARONE, E. "Physical Properties of Molecular Cloud Cores in L1630 and Implications for Star Formation." ApJ 488: 286-306,1997.

LANG, C.C.; GOSS, W.M.; WOOD, D.O.S. "VLA H92a and HI 156 Recombination Line Observations ofthe Galactic Center H n Regions: The Sickle (GO.18-0.04) and the Pistol (G0.15-0.05)" ApJ 474: 275-291,1997, erratum ApJ 481: 1016,1997.

LARA, L.; COTTON, W.D.; FERETTI, L.; GIOVANNINI, G.; VENTURI, T.; MARCAIDE, J.M. "VLBI Observations of a Complete Sample of Radio Galaxies. VH. Study ofthe FR I Sources 3C 31,4C 35.03, and 3C 264." ApJ 474: 179-187,1997.

LARA, L.; GIOVANNINI, G.; COTTON, W.D.; FERETTI, L.; VENTURI, T.; BAUM, S.A.; O'DEA, C.P.; DE KOFF, S.; SPARKS, W.B. "EVN and MERLIN Observations ofthe FR 1 Radio Galaxy 3C264." Vistas Astron. 41: 241-245,1997.

LARA, L.; MUXLOW, T.W.B.; ALBERDI, A.; MARCAIDE, J.M.; JUNOR, W.; SAIKIA, D.J. "Radio Observations ofthe Quasar 3C395 from Parsec to Kiloparsec Scales." A&A 319: 405-412,1997.

LARSON, D.T.; SCHULMAN, E. "A Revised Orbital Period for M33 X-7." AJ 113: 618-623,1997.

LAURENT-MUEHLEISEN, S.A.; KOLLGAARD, RX; RYAN, P.J.; FEIGELSON, E.D.; BRINKMANN, W.; SBEBERT, J. "Radio-Loud Active Galaxies in the Northern ROSAT All-Sky Survey. I. Radio Identifications." A&AS 122: 235-247,1997.

LEAHY, J.P.; BLACK, A.R.S.; DENNETT-THORPE, J.; HARDCASTLE, M.J.; KOMISSAROV, S.; PERLEY, R.A.; RILEY, J.M.; SCHEUER, P.A.G. "A Study ofFRII Radio Galaxies withz<0.15. H. High-Resolution Maps of 11 Sources at 3.6 cm." MNRAS 291: 20-53,1997.

LEBRON, M.; RODRIGUEZ, L.F. "Photodissociated HI in NGC 2023." Rev. Mex. Astron. Astrof. 33: 165-172,1997.

LEE, S.-W.; IRWIN, J.A. "Neutral Hydrogen in the Edge-On Spiral Galaxy NGC 3044 — Global Properties and Discovery of H I Supershells." ApJ 490: 247-262,1997.

LEHAR, J.; BURKE, B.F.; CONNER, S.R.; FALCO, E.E.; FLETCHER, A.B.; IRWIN, M.; MCMAHON, R.G.; MUXLOW, T.W.B.; SCHECHTER, PX. "The Gravitationally Lensed Radio Source MG 0751+2716." AJ 114:48-53,1997.

49 LETTCH, E.M.; READHEAD, A.C.S.; PEARSON, T.J.; MYERS, S.T. "An Anomalous Component of Galactic Emission." ApJ 486: L23-L26,1997.

LI, P.; HERLEY, K.; VRBA, F.; KOUVELIOTOU, C; MEEGAN, C; FISHMAN, G.; KULKARNI, S.; FRAIL, D. "ROSAT X-ray Observation ofthe Second Error Box for SGR 1900+14." ApJ 490: 823-825,1997.

LIANG, H.; PIERRE, M.;UNEWISSE, A.; HUNSTEAD, R.W. "An X-ray and Radio Study of the Cluster A 2717." A&A321: 64-70, 1997.

LINDBLAD, P.A.B.; KRISTEN, H.; JORSATER, S.; HOGBOM, J. "The Velocity Field ofthe Barred Spiral Galaxy NGC 1300 Revisited." A&A 317: 36-42,1997.

LISZT, H. "Recovering Line Profiles from Frequency-Switched Spectra." A&AS 124:183-188,1997.

LISZT, H.S. "A Home-Grown but Widely-Distributed Data Analysis System." ADASS 6: 3-9,1997.

LISZT, H.S. "Molecular Emission from the Diffuse Gas Around <; Ophiuchi." A&A 322: 962-974,1997.

LOBANOV, A.P.; CARRARA, E.; ZENSUS, J.A. "Spectral Imaging: Shock Fronts and Plasma Instabilities." Vistas Astron. 41: 253-257,1997.

LOCKLEY, J.J.; EYRES, S.P.S.; WOOD, J.H. "A Radio Detection of V Sagittae." MNRAS 287: L14-L16,1997.

LOPEZ, J.A.; MEABURN, J.; BRYCE, M.; RODRIGUEZ, L.F. "The Kinematics ofthe Extensive Bipolar Lobes and Symmetric Knots ofthe Planetary Nebula KjPn 8 (PK 112-00 1)" ApJ 475: 705-712,1997.

LUCAS, R.; LISZT, H.S. "Millimeter-Wave Absorption Studies ofthe Onset of Dark-Cloud Chemistry." IAU Symp. 170:95-97,1997.

LUCAS, R.; LISZT, H.S. "Millimeter-Wave Observations of Diffuse Clouds." IAU Symp. 178: 421-430,1997.

LUDKE, E. "The Laing-Garrington Effect in High-z Radio Sources Associated with Optical Absorbers." In: Young Galaxies and QSO Absorption-Line Systems (ASP, ed. Viegas et al): 103-106,1997.

50 LUDKE, E.; BELLICANTA, A. "A Study of Faraday Effects in Steep-Spectrum Radio Sources with Galactic Sizes." In: Young Galaxies and QSO Absorption-Line Systems (ASP, ed. Viegas et al): 107-110,1997.

LUDKE, E.; SANGHERA, H.S.; COTTON, W.D. "Polarization Imaging with MERLIN at K-Band to Resolve Faraday Effects in CSS Jets." In: High-Sensitivity Radio Astronomy (Cambridge, ed. Jackson & Davis): 165-166,1997.

MALPHRUS, B.K.; SIMPSON, C.E.; GOTTESMANN, S.T.; HAWARDEN, T.G. ^GC 5291: Implications for the Formation of Dwarf Galaxies." AJ 114: 1427-1446,1997.

MANGUM. J.G.; LATTER, W.B.; MCMULUN, J.P. "The Dense Gas Structure and Kinematic Temperature in the Serpens Molecular Cloud." IAU Symp. 170 (poster vol., NRAO): 76-80,1997.

MANGUM, J.G.; WOOTTEN, A.; BARSONY, M. "The Kinetic Temperature Structure Within NGC2024." IAU Symp. 182 (poster vol): 18-20,1997.

MANTOVANI, F.; JUNOR, W.; FANTI, R.; PADRIELLI, L.; SAIKIA, D.J. "VLA Polarimetry of Compact Steep Spectrum Sources." A&AS 125: 573-580,1997.

MARCAIDE, J.M.; ALBERDI, A.; ROS, E.; DIAMOND, P.; SHAPIRO, IX; GUIRADO, J.C; JONES, D.L.; MANTOVANI, F.; PEREZ-TORRES, M.A.; PRESTON, R.A.; SCHILIZZI, R.T.; SRAMEK, R.A.; TRIGILIO, C; VAN DYK, S.D.; WEILER, K.W.; WHITNEY, A.R. "Deceleration in the Expansion of SN 1993J." ApJ 486: L31-L34,1997.

MARCAIDE, J.M.; ALBERDI, A.; ROS, E.; DIAMOND, P.; SHAPIRO, I.I.; GUIRADO, J.C; JONES, D.L.; MANTOVANI, F.; PEREZ-TORRES, M.A.; PRESTON, R.A.; SCHILIZZI, R.T.; TRIGILIO, C; WHITNEY, A.R. "Expansion of SN 1993J: New A. k 6 and 13 cm Images." Vistas Astron. 41:185-191,1997.

MARCUM, P.M.; FANELLI, M.N.; CORNETT, R.H.; HILL, J.K.; WALLER, W.H.; O'CONNELL, R.W.; CHENG, K.-P.; BOHLIN, R.C; ROBERTS, M.S.; HINTZEN, P.M.; SMITH, A.M.; SMITH, E.P.; STECHER, T.P. "The Astro-l/UTT Ultraviolet Galaxy Atlas." In: Ultraviolet Universe at Low and High Redshift (AIP, ed. Waller et al): 88-93,1997.

MARSCHER, A.P.; MARCHENKO, S.G.; WEHRLE, A.E.; XU, W.; BLOOM, S.D.; MOORE, E.M. "7 mm VLBI Observations of 3C 454.3: The Nature ofthe Core." In: Millimeter-VLBI Science Workshop (Haystack, ed. Barvainis & Phillips): 43-46,1997.

51 MARTI, J.; MIRABEL, I.F.; RODRIGUEZ, L.F.; PAREDES, J.M. "Search for Radio Jets in Cygnus X-l." Vistas Astron. 41: 33-36, 1997.

MCCULLOUGH, MX.; ROBINSON, C.R.; ZHANG, S.N.; HARMON, B.A.; PACIESAS, W.S.; HJELLMING, R.M.; RUPEN, M.; MIODUSZEWSKI, A.J.; WALTMAN, E.B.; FOSTER, R.S.; GHIGO, F.D.; POOLEY, G.G.; FENDER, R.P.; CUI, W. "A Multiwavelength Study of Cygnus X-3." Compton Symp. 4: 813-817,1997.

MCINTYRE, V.J. "Star Formation and Gas Distribution in the Magellanic Spiral NGC 4214." PASA 14: 122-123,1997.

MCKINNON, M.M. "Birefringence as a Mechanism for the Broadening and Depolarization of Pulsar Average Profiles." ApJ 475: 763-769,1997.

MEGEATH, ST.; WILSON, TX. "The NGC 281 West Cluster. I. Star Formation in Photoevaporating Clumps." AJ 114:1106-1120,

MEHRINGER, D.M.; MENTEN, K.M. "44 GHz Methanol Masers and Quasi-thermal Emission in Sagittarius B2." ApJ 474:346-361, 1997.

MENTEN, K.M.; REID, M.J.; ECKART, A.; GENZEL, R. "The Position of Sagittarius A*: Accurate Alignment ofthe Radio and Infrared Reference Frames at the Galactic Center." ApJ 475: LI 11-L114,1997.

METZGER, M.R.; COHEN, JX.; BLAKESLEE, J.P.; KULKARNI, S.R.; DJORGOVSKI, S.G.; STEIDEL, C.C.; FRAIL, D.A. "GRB 970228." IAU Circ 6631:18 April 1997.

METZGER, M.R.; KULKARNI, S.R.; DJORGOVSKI, S.G.; GAL, R.; STEIDEL, C.C.; FRAIL, D.A. "GRB 970228." IAU Circ. 6582: 11 March 1997.

METZGER, M.R.; KULKARNI, S.R.; DJORGOVSKI, S.G.; GAL, R.; STEIDEL, C.C.; FRAIL, D.A. "GRB 970228." IAU Circ 6588: 14 March 1997.

MIAO, Y.; SNYDER, L.E. "Full Synthesis Observations of CHjO^CN in Sagittarius B2: Further Evidence for Grain Chemistry." ApJ 480: L67-L70,1997.

52 MDSfTER, A.H.; BALSER, D.S. "The Effects of Thermal Heating via the Dissipation of Turbulence on Physical Conditions in the Galactic Diffuse Ionized Gas." ApJ 484: L133-L136,1997.

MINTER, A.H.; SPANGLER, S.R, "Heating ofthe Interstellar Diffuse Ionized Gas via the Dissipation of Turbulence." ApJ 485: 182-194, 1997.

MIRANDA, L.F.; VAZQUEZ, R.; TORRELLES, J.M.; EIROA, C; LOPEZ, J.A. "The Structure ofthe Compact Planetary Nebulae Cn 3-1 and M 3-27 and Their Extended Haloes." MNRAS 288: 777-786,1997.

MONTES, MX; VAN DYK, S.D.; WEILER, K.W.; SRAMEK, R.A.; PANAGIA, N. "Radio Detection of SN 1986E in NGC 4302." ApJ 482: L61-L64,1997.

MOORE, C.B.; HEWITT, J.N. "15 GHz Monitoring ofthe Gravitational Lens MG 0414+0534." ApJ 491:451-458,1997.

MORAN, E.C.; HELFAND, D.J. "The 3-53 keV Spectrum ofthe Quasar 1508+5714: X-rays from z=4.3." ApJ 484: L95-L98,1997.

MOREIRA, M.C; YUN, J.L.; VAZQUEZ, R.; TORRELLES, J.M. "Thermal Radio Sources in Bok Globules." AJ 113: 1371-1374, 1997.

MORGANTI, R.; PARMA, P.; CAPETTI, A.; FANTI, R.; DE RUTTER, H.R. "Asymmetric Depolarization in Double Low-Luminosity Radio Galaxies." A&A 326: 919-923,1997.

MORGANTI, R.; PARMA, P.; CAPETTI, A.; FANTI, R.; DE RUTTER, H.R.; PRANDONI, I. "Polarization of Low-Luminosity Radio Galaxies: The 6 cm Data." A&AS 126: 335-355,1997.

MUXLOW, T.W.B.; PEDLAR, A.; WILLS, K.A.; WILKINSON, P.N.; AXON, D.J. "SNR and Ionized Gas in M82." In: High-Sensitivity Radio Astronomy (Cambridge, ed. Jackson & Davis): 149-152,1997.

NAVARRO, J.; MANCHESTER, R.N.; SANDHU, J.S.; KULKARNI, S.R.; BAILES, M. "Mean Pulse Shape and Polarization of PSR J0437-4715." ApJ 486: 1019-1025,1997.

53 NEFF, S.G.; HOLLIS, J.E.; HILL, J.K.; FANELLI, M.N.; SMITH, D.A.; SMITH, A.M.; STECHER, T.P.; BOHLIN, R.C; O'CONNELL, R.W.; ROBERTS, M.S. "Far-Ultraviolet Emission from NGC 4038/4039, 'The Antennae': Massive Star Formation in Compact Clusters." In: Star Formation Near and Far (AIP, ed. Holt & Mundy): 473-474,1997.

NEFF, S.G.; HOLLIS, J.E.; HILL, J.K.; FANELLI, M.N.; SMITH, D.A.; SMITH, A.M.; STECHER, T.P.; BOHLIN, R.C.; O'CONNELL, R.W.; ROBERTS, M.S. "Far-Ultraviolet Emission from NGC 4038/4039, "The Antennae": Massive Star Formation in Compact Clusters." In: Ultraviolet Universe at Low and High Redshift (AIP, ed. Waller et al): 60,1997.

NEL; H.L; ARZOUMANIAN, Z.; BAILES, M.; BRAZIER, K.T.S.; D'AMICO, N.; ESPOSTTO, J.A.; FICHTEL, C.E.; FIERRO, J.M. HUNTER, S.D.; JOHNSTON, S.; KANBACH, G.; KASPI, V.M.; KNIFFEN, D.A.; LYNE, A.G.; UN, Y.C; MANCHESTER, R.N. MATTOX, J.R.; MAYER-HASSELWANDER, H.A.; MERCK, M.; MICHELSON, P.F.; NICE, D.J.; NOLAN, PX. RAMANAMURTHY, P.V.; TAYLOR, J.H.; THOMPSON, D.J.; WESTBROOK, C. "EGRET Pulsar Upper Limits." A&AS 120: 89- 93,1997.

NEWELL, S.J.; SPENCER, R.E.; GARRETT, M.A. "MERLIN and VLBA Observations of Cygnus X-3." Vistas Astron. 41: 57-63, 1997.

NICE, D.J.; SAYER, R.W. "A Survey of EGRET Sources for Pulsed Radio Emission." ApJ 476: 261-266,1997.

NELSSON, K.; LEHTO, H.K. "PKS 0241+011: The Largest Quasar?" A&A 328: 526-530,1997.

NORDGREN, T.E.; CHENGALUR, J.N.; SALPETER, E.E.; TERZIAN, Y. "Close Galaxy Pairs in Low and Medium Density Regions: The Southern Sky." AJ 114: 913-931,1997.

O'CONNELL, R.W.; DORMAN, B.; SHAH, R.Y.; ROOD, R.T.; LANDSMAN, W.B.; BOHLIN, R.C.; NEFF, S.G.; ROBERTS, M.S.; SMITH, A.M.; STECHER, T.P. "Ultraviolet Imaging ofthe Globular Cluster 47 Tucanae." AJ 114: 1982-1991,1997.

ODEWAHN, S.C; DJORGOVSKI, S.G.; KULKARNI, S.R.; FRAIL, D.A. "GRB 970828." IAU Circ 6735: 5 September 1997.

OWEN, F.N.; LEDLOW, MJ. "A 20 Centimeter VLA Survey of Abell Clusters of Galaxies. VH. Detailed Radio Images." ApJS 108: 41-98,1997.

54 OWEN, F.N.; LEDLOW, M.J.; MORRISON, G.E.; HILL, J.M. "The Cluster of Galaxies Surrounding Cygnus A." ApJ 488: L15-L17, 1997.

PAGLIONE, T.A.D.; JACKSON, J.M.; ISHIZUKI, S. "The Average Properties ofthe Dense Molecular Gas in Galaxies." ApJ 484: 656-663,1997.

PAHRE, M.A.; CLEMENS, J.C; KULKARNI, S.R.; REID, I.N.; FRAIL, D.A.; CORDES, J. "GRB 970616." IAU Circ 6691: 1 July 1997.

PAREDES, J.M.; PERACAULA, M.; MARTI, J.; ESTALELLA, R. •'New Results on LSI +610303 and Cygnus X-3." Vistas Astron. 41:49-56,1997.

PARTRIDGE, R.B.; RICHARDS, E.A.; FOMALONT, E.B.; KELLERMANN, K.I.; WINDHORST, R.A. "Smali-Scale Cosmic Microwave Background Observations at 8.4 GHz." ApJ 483: 38-50,1997.

PECK, A.B.; GOSS, W.M.; DICKEL, H.R.; ROELFSEMA, P.R.; KESTEVEN, M.J.; DICKEL, J.R.; MILNE, D.K.; POINTS, S.D. "Australia Telescope Compact Array Observations of Radio Recombination Lines Toward 30 Doradus." ApJ 486: 329-337,1997.

PENTERICCI, L.; ROTTGERING, H.; MILEY, G.K.; CARILLI, C.L.; MCCARTHY, P.J. "The Radio Galaxy 1138-262 at z=2.2: A Giant Elliptical Galaxy at the Center of a Proto-cluster?" A&A 326: 580-596,1997.

PERACAULA, M.; MARTI, J.; PAREDES, J.M. "Short Term Radio Variability and Polarization Properties of LSI +610303." A&A 328: 283-289,1997. PEREA, J.; DEL OLMO, A.; VERDES-MONTENEGRO, L.; YUN, M.S. "Nonlinear Dependence of 1^ on L^ and M^ Among Spiral Galaxies and Effects of Tidal Interaction." ApJ 490: 166-172,1997.

PERLEY, R.A. "The VLA Upgrade Project." In: High-Sensitivity Radio Astronomy (Cambridge, ed. Jackson & Davis): 242-251, 1997. PERLEY, R.A.; ROSER, H.-J.; MEISENHEIMER, K. "The Radio Galaxy Pictor A - A Study with the VLA." A&A 328:12-32,1997.

55 PESCE, J.E.; URRY, CM.; MARASCHI, L.; TREVES, A.; GRANDI, P.; KOLLGAARD, R.L; PIAN, E.; SMITH, P.S.; ALLER, H.D.; ALLER, M.F.; BARTH, A.J.; BUCKLEY, D.A.H.; COVINO, E.; FBLIPPENKO, A.V.; HOOPER, E.J.; JONER, M.D.; KEDZIORA-CHUDCZER, L.; KILKENNY, D.; KNEE, L.B.G.; KUNKEL, M.; LAYDEN, A.C; MAGALHAES, A.M.; MARANG, F.; MARGONINER, V.E.; PALMA, C; PEREYRA, A.; RODRIGUES, C.V.; SCHUTTE, A.; STTKO, MX.; TORNKOSKI, M.; VAN DER WALT, J.; VAN WYK, F.; WHTTLOCK, P.A.; WOLK, S.J. "Multiwavelength Monitoring ofthe BL Lacertae Object PKS 2155-304 in 1994 May. I. The Ground-Based Campaign." ApJ 486: 770-783,1997.

PICKERING, T.E.; IMPEY, CD.; VAN GORKOM, J.H.; BOTHUN, G.D. "Neutral Hydrogen Distributions and Kinematics of Giant Low Surface Brightness Disk Galaxies." AJ 114: 1858-1882,1997.

POSPIESZALSKI, M.W. "Ultra-Low-Noise Heterostructure Field-Effect Transistor, Millimeter-Wave Receivers." In: Microwave Background Anisotropics (Editions Frontieres, ed. Bouchet et al.): 23-30,1997.

POSPIESZALSKI, M.W.; LAKATOSH, W.J.; WOLLACK, E.; NGUYEN, L.D.; LE, M.; LUI, M.; LIU, T. "Millimeter-Wave Waveguide-Bandwidth Cryogenically-Coolable InP HEMT Amplifiers." IEEE MTT-S Int Microwave Symp.: 1285-1288,1997.

POUND, M.W.; GRUENDL, R.; LADA, E.A.; MUNDY, L. "High-Spatial Resolution Imaging ofthe NGC 2024 Molecular Ridge." In: Star Formation Near and Far (AIP, ed. Holt & Mundy): 395-398,1997.

PUSTIUNIK, S.A.; LIPOVETSKY, V.A.; IZOTOV, YUX; BRINKS, E.; THUAN, T.X.; KNYAZEV, A.YU.; NEIZVESTNYI, S.I.; UGRYUMOV, A.V. "Detection of a Second Optical Component in the HI Cloud ofthe Young Dwarf Galaxy SBS 0335-052: New Observations with the 6-m Telescope." Astron. Lett. 23: 308-311,1997 Translation of: Pis'ma Astron. Zh. 23: 350-353,1997.

RADFORD, S.J.E. "CO in High Redshift Galaxies." IAU Symp. 170: 327-334,1997.

RAY, P.S.; FOSTER, R.S.; WALTMAN, E.B.; TAVANI, M.; GHIGO, F.D. "Long-Term Flux Monitormg of LSI +610303 at 2.25 and 8.3 GHz." ApJ 491: 381-387,1997.

REID, M.J.; MENTEN, K.M. "Radio Photospheres of Long-Period Variable Stars." ApJ 476: 327-346,1997.

REYNOSO, E.M.; GOSS, W.M.; DUBNER, G.M.; WINKLER, P.F.; SCHWARZ, U.J. "Neutral Hydrogen Compact Absorption Features in Cassiopeia A." A&A 317: 203-211,1997.

56 REYNOSO, E.M.; MOFFETT, D.A.; GOSS, W.M.; DUBNER, G.M.; DICKEL, J.R.; REYNOLDS, S.P.; GIACONI, E.B. "A VLA Study ofthe Expansion of Tycho's Supernova Remnant." ApJ 491: 816-828,1997.

RICHARDS, E.A.; FOMALONT, E.B.; KELLERMANN, K.I.; PARTRIDGE, R.B.; WINDHORST, R.A. "Detection of a Small-Scale Cosmic Microwave Background Decrement at 3.6 cm." AJ 113: 1475-1482,1997.

RIOJA, M.J.; MARCAIDE, J.M.; ELOSEGUI, P.; SHAPIRO, LI. "Results from a Decade-Long VLBI Astrometric Monitoring ofthe Pair of Quasars 1038+528 A and B." A&A 325: 283-390,1997.

RIOJA, M.J.; STEVENS, E.; GURVTTS, L.; ALEF, W.; SCHILIZZI, R.T.; SASAO, T.; ASAKI, Y. "Phase-Referencing in 'Cluster-Cluster' VLBI Mode." Vistas Astron. 41: 213-217,1997.

ROBERTS, D.A.; CRUTCHER, R.M.; TROLAND, T.H. "BIMA ,3CO Observations of W3." ApJ 479: 318-324,1997.

ROBERTS, D.A.; DICKEL, H.R.; GOSS, W.M. "High-Resolution Observations of HI Zeeman Absorption Toward DR 21." ApJ 476: 209-222,1997.

ROBERTS, M.S. "Global Properties of Galaxies Along the Hubble Sequence." In: Ultraviolet Universe at Low and High Redshift (AIP, ed. Waller et al): 343-348,1997.

ROBINSON, C.R.; ZHANG, S.N.; MCCOLLOUGH, MX.; HARMON, B.A.; DIETERS, S.; PACIESAS, W.S.; TAVANI, M.; FENDER, R.P.; POOLEY, G.G.; WALTMAN, E.; MIRABEL, I.F.; HJELLMING, R.M.; RUPEN, M.; GHIGO, F.; RODRIGUEZ, L.F.; EBISAWA, K. "GRS 1915+105." IAU Circ 6651: 6 May 1997.

RODRIGUEZ, L.F.; ANGLADA, G.; CURIEL, S. "Is SVS 13 the Exciting Source ofthe HH 7-11 Flow?" ApJ 480: L125-L128,1997.

RODRIGUEZ, L.F.; MIRABEL, I.F. "Fast Sinusoidal Oscillations in the Radio Flux of GRS 1915+105." ApJ 474: L123-L125,1997.

ROMERO, G.E.; COMBI, J.A.; BENAGUA, P.; AZCARATE, I.N.; CERSOSIMO, J.C; WILKES, L.M. "Search for Intraday Radio Variability in EGRET Blazars." A&A 326: 77-86,1997.

ROSER, H.-J.; MEISENHEIMER, K.; NEUMANN, M.; CONWAY, R.G.; DAVIS, R.J.; PERLEY, R.A. "The Jet ofthe Quasar 3C273 at High Resolution." Rev. Mex. Astron. Astrof. 10: 253-261,1997.

57 RUPEN, M.P. "Molecular Gas in Elliptical Galaxies." In: Nature of Elliptical Galaxies (ASP, ed. Amaboldi et al): 322-337,1997.

SANDHU, J.S.; BAILES, M.; MANCHESTER, R.N.; NAVARRO, J.; KULKARNI, S.R.; ANDERSON, S.B. "The Proper Motion and Parallax of PSR J0437-4715." ApJ 478: L95-L98,1997. SANDOR, B.J.; CLANCY, R.T.; RUSCH, D.W.; RANDALL, CE.; ECKMAN, R.S.; SISKIND, D.S.; MUHLEMAN, D.O. "Microwave Observations and Modeling of 02C\) and O3 Diurnal Variation in the Mesosphere." J. Geophys. Res. 102: 9013-9028, 1997.

SARMA, A.P.; GOSS, W.M.; GREEN, A.J.; FRAIL, D.A. "Australia Telescope Observations ofthe CTB 33 Complex." ApJ 483: 335-339,1997.

SAUVAGE, M.; THUAN, T.X.; LAGAGE, P.O. "10 Jim Imaging and HI Observations ofthe Blue Compact Dwarf Galaxy He 2-10." A&A 325: 98-108,1997.

SAYER, R.W.; NICE, D.J.; TAYLOR, J.H. "The Green Bank Northern Sky Survey for Fast Pulsars." ApJ 474: 426-432,1997.

SCHIMINOVICH, D.; VAN GORKOM, J.; VAN DER HULST, T.; OOSTERLOO, T.; WILKINSON, A. "Imaging and Kinematics of Neutral Hydrogen in and Around 'Shell Galaxies'" In: Nature of Elliptical Galaxies (ASP, ed. Amaboldi et al): 362-363,1997.

SCHULMAN, E.; BRINKS, E.; BREGMAN, J.N.; ROBERTS, M.S. "UGC 12732: A Disk Galaxy Lacking High-Velocity Clouds." AJ 113: 1559-1568,1997.

SCHULMAN, E.; COX, CV. "Misconceptions About Astronomical Magnitudes." Am. J. Phys. 65:1003-1007,1997.

SCHULMAN, E.; FRENCH, J.C; POWELL, AX.; EICHHORN, G.; KURTZ, M.J.; MURRAY, S.S. "Trends in Astronomical Publication Between 1975 and 1996." PASP 109: 1278-1284,1997. SCHULMAN, E.; FRENCH, J.C; POWELL, A.L.; MURRAY, S.S.; EICHHORN, G.; KURTZ, MJ. "The Sociology of Astronomical Publications Using ADS and ADAMS." ADASS 6: 361-364,1997. SCHWARZ, U.J.; GOSS, W.M.; KALBERLA, P.M.W. "WSRT HI Synthesis Absorption Study Towards Cassiopeia A." A&AS 123: 43-58,1997.

58 SCOVILLE, N.Z.; YUN, M.S.; BRYANT, P.M. "Arcsecond Imaging of CO Emission in the Nucleus of Arp 220." ApJ 484: 702-719, 1997.

SCOVILLE, N.Z.; YUN, M.S.; WINDHORST, R.A.; KEEL, W.C; ARMUS, L. "CO J=3-2 Emission in the Radio Galaxy 53W002 at z=2.394." ApJ 485: L21-L24,1997.

SEAQUIST, E.R.; FRAYER, D.T.; FRAIL, D.A. "OH Satellite Line Masers and an Active Galactic Nucleus Candidate in M82." ApJ 487: L131-L134,1997.

SHAVER, P.; WALL, J.; KELLERMANN, K.; JACKSON, C; HAWKINS, M. "Radio-Selected High Redshift Quasars." In: Early Universe with the VLT (Springer, ed. Bergeron): 349-356,1997.

SHEPHERD, D.S.; CHURCHWELL, E.; WILNER, D.J. "A High Spatial Resolution Study ofthe ON2 Massive Star-Forming Region." ApJ 482: 355-371,1997.

SKINNER, C.J.; DOUGHERTY, S.M.; MEIXNER, M.; BODE, M.F.; DAVIS, R.J.; DRAKE, S.A.; ARENS, J.F.; JERNIGAN, J.G. "Circumstellar Environments - V. The Asymmetric Chromosphere and Dust Shells of a Orionis." MNRAS 288: 295-306,1997.

SLYSH, V.I.; KALENSKH, S.V.; VALTTS, LE.; GOLUBEV, V.V. "Detection of aNew Methanol Maser Line with the Kitt Peak 12 Meter Telescope by Remote Observing from Moscow." ApJ 478: L37-L40,1997.

SMITH, B.J.; MADDEN, S.C "Interstellar Gas in Low Mass Virgo Cluster Spirals." AJ 114: 138-146,1997.

SMITH, B.J.; STRUCK, C; POGGE, R.W. "Atomic Hydrogen and Star Formation in the Bridge/Ring Interacting Galaxy Pair NGC 7714/7715 (Arp 284)" ApJ 483: 754-766,1997.

SMITH, D.A; NEFF, S.G.; STECHER, T.P.; SMITH, A.M.; BOTHUN, G.; FANELLI, M.N.; OFFENBERG, J.D.; WALLER, W.H.; BOHLIN, R.C.; O'CONNELL, R.W.; ROBERTS, M.S. "Ultraviolet Imaging of Nearby Starbursts: NGC 3310." In: Ultraviolet Universe at Low and High Redshift (AIP, ed. Waller, et al.): 50-54,1997.

SMITH, E.P.; BOHLIN, R.C.; BOTHUN, G.D.; O'CONNELL, R.W.; ROBERTS, M.S.; NEFF, S.G.; SMITH, A.M.; STECHER, T.P. "Ultraviolet Imaging Observations of Abell 1795: Further Evidence for Massive Star Formation." In: Star Formation Near and Far (AIP, ed. Holt & Mundy): 551-554,1997.

59 SMITH, E.P.; BOHLIN, R.C.; BOTHUN, G.D.; O'CONNELL, R.W.; ROBERTS, M.S.; NEFF, S.G.; SMITH, A.M.; STECHER, T.P. "Ultraviolet Imaging Observations ofthe cD Galaxy in Abell 1795: Further Evidence for Massive Star Formation in a Cooling Flow." ApJ 478: 516-521,1997.

SNELLEN, I.A.G.; SCHILIZZI, R.T.; DE BRUYN, A.G.; MILEY, G.K.; VAN LANGEVELDE, H.J. "Multi-frequency VLBI Observations of Faint GPS Sources from WENSS." Vistas Astron. 41: 265-269,1997.

SOIFER, B.; NEUGEBAUER, G.; ARMUS, L.; METZGER, M.; KULKARNI, S.; DJORGOVSKI, S.; STEIDEL, C; FRAIL, D. "GRB 970228." IAU Circ 6619: 9 April 1997.

SOLOMON, P.; DOWNES, D.; RADFORD, S.; BARRETT, J. "The Molecular Interstellar Medium in Ultraluminous Infrared Galaxies." ApJ 478: 144-161,1997.

SPUMRAD, H.; DEY, A.; STERN, D.; DUNLOP, J.; PEACOCK, J.; JIMENEZ, P.; WINDHORST, R. "LBDS 53W091: An Old, Red Galaxy at z = 1.552." ApJ 484: 581-601,1997.

STECHER, T.P.; CORNETT, R.H.; GREASON, M.R.; LANDSMAN, W.B.; HILL, J.K.; HILL, R.S.; BOHLIN, R.C.; CHEN, P.C.; COLLINS, N.R.; FANELLI, M.N.; HOLLIS, JX; NEFF, S.G.; O'CONNELL, R.W.; OFFENBERG, J.D.; PARISE, R.A.; PARKER, J.W.; ROBERTS, M.S.; SMITH, A.M.; WALLER, W.H. "The Ultraviolet Imaging Telescope: Instrument and Data Characteristics." PASP 108: 584-599,1997.

STIRLING, A.M.; SPENCER, R.E.; WATSON, S.K. "New VLBI Observations of SS433." Vistas Astron. 41: 197-201,1997.

STROM, R.; DE PATER, I.; VAN DER TAK, F. "Longitudinal Asymmetry of Jupiter's Radiation Belts After the Encounter with Comet D/Shoemaker-Levy 9." In: High-Sensitivity Radio Astronomy (Cambridge, ed. Jackson & Davis): 2-5,1997.

SUBRAHMANYAN, R.; GOSS, W.M.; MEGEATH, ST.; BARNES, PX "A Thermal Plume in NGC 2024." MNRAS 290:431-438, 1997.

TAYLOR, G.B.; BEASLEY, AX; FRAIL, D.A.; KULKARNI, S.R. "GRB 970508." IAU Circ 6670: 24 May 1997.

TAYLOR, G.B.; FRAIL, D.A.; BEASLEY, A.J.; KULKARNI, S.R. "Position and Parallax ofthe y-ray Burst of 8 May 1997." Nature 389: 263-265,1997.

60 TAYLOR, G.B.; VERMEULEN, R.C "Bidirectional Relativistic Jets ofthe Radio Galaxy 1946+708: Constraints on the Hubble Constant." ApJ 485: L9-L12,1997.

TEUBEN, P.; WELLS, D.C "FITS BoF Session." ADASS 6: 270-272,1997.

THEAN, A.H.C.; MUNDELL, C.G.; PEDLAR, A.; NICHOLSON, R. "A Neutral Hydrogen Study ofthe Seyfert Galaxy NGC 5033." MNRAS 290: 15-24,1997.

THORNLEY, M.D.; MUNDY, L.G. "Are Flocculent Spirals Devoid of Density Waves? Gas Morphology and Kinematics in NGC 5055." ApJ 484: 202-221,1997.

THORNLEY, M.D.; MUNDY, L.G. "Dynamic and Stochastic Influences on Spiral Structure in the Flocculent Spiral NGC 4414." ApJ 490: 682-697,1997.

TIEFTRUNK, A.R.; GAUME, R.A.; CLAUSSEN, M.J.; WILSON, T.L.; JOHNSTON, K.J. "The H H/Molecular Cloud Complex W 3 Revisited: Imaging the Radio Continuum Sources Using Multi-Configuration, Multi-Frequency Observations with the VLA." A&A 318:931-946,1997.

TIFFT, W.G. "Global Redshift Periodicities and Periodicity Variability." ApJ 485:465-483,1997.

TORRELLES, J.M.; GOMEZ, J.F.; RODRIGUEZ, L.F.; HO, P.T.P.; CURIEL, S.; VAZQUEZ, R. "A Radio Jet-H20 Maser System in W75N(B) at 200 AU Scale: Exploring the Evolutionary Stages of Young Stellar Objects." ApJ 489: 744-752,1997.

TROTTER, A.S.; MORAN, J.M.; GREENHILL, L.J.; ZHENG, X.-W.; GWINN, CR. "VLBA Imaging ofthe OH Maser in m Zw 35." ApJ 485: L79-L82,1997.

TURNER, B.E.; PIROGOV, L.; MINH, Y.C. "The Physics and Chemistry of Small Translucent Molecular Clouds. Vm. HCN and HNC." ApJ 483: 235-261,1997.

UDOMPRASERT, P.S.; TAYLOR, G.B.; PEARSON, T.J.; ROBERTS, D.H. "Evidence for Ordered Magnetic Fields in the Quasar Environment." ApJ 483: L9-L12,1997.

61 ULVESTAD, J.S. "Space Radio Astronomy." In: Space Technology and Applications International Forum (AIP, ed. El-Genk): 37-42,1997.

ULVESTAD, J.S.; ANTONUCCI, R.R.J. "VLA Observations of NGC 253: Supernova Remnants and H H Regions at 1 Parsec Resolution." ApJ 488: 621-641,1997.

UNWIN, S.C; WEHRLE, A.E.; LOBANOV, A.P.; ZENSUS, J.A.; MADEJSKI, G.M.; ALLER, M.F.; ALLER, H.D. "Variability in the Inverse-Compton X-ray Flux from the Jet in Quasar 3C 345." ApJ 480: 596-606,1997.

VAN LANGEVELDE, H.J.; VAN DISHOECK, E.F.; BLAKE, G.A. "Dust and CO in the T Tauri Circumstellar Matter." IAU Symp. 170 (poster vol., NRAO): 126-131,1997.

VAN OJIK, R.; ROTTGERING, H.J.A.; VAN DER WERF, P.P.; MILEY, G.K.; CARILLI, C.L.; VISSER, A.; ISAAK, K.G.; LACY, M.; JENNESS,T.;SLEATH,J.;WINK,J. "A Search for Molecular Gas in High Redshift Radio Galaxies." A&A 321:389-396,1997.

VAN ZEE, L.; HAYNES, M.P.; SALZER, J.J.; BROE1LS, A.H. "A Comparative Study of Star Formation Thresholds in Gas-Rich Low Surface Brightaess Dwarf Galaxies." AJ 113: 1618-1637,1997.

VAN ZEE, L.; MADDALENA, R.J.; HAYNES, M.P.; HOGG, D.E.; ROBERTS, M.S. "Obtaining High Precision H I Fluxes for Galaxies." AJ 113: 1638-1647,1997.

VENTURI, T.; PEARSON, T.J.; BARTHEL, P.D.; UNWIN, S.C. "The Parsec-Scale Evolution ofthe Superluminal Quasar 1642+690." A&A 325: 484-492,1997.

VERDES-MONTENEGRO, L.; YUN, M.; PEREA, J.; DEL OLMO, A. "CO and FIR Emission in Hickson Compact Groups." In: Dark and Visible Matter in Galaxies (ASP, ed. Persic & Salucci): 530-536, 1997.

VOURLIDAS, A.; BASTIAN, T.S.; ASCHWANDEN, M.J. "The Structure ofthe Solar Corona Above Sunspots as Inferred from Radio, X-ray, and Magnetic Field Observations." ApJ 489: 403-425,1997.

WAKKER, B.P.; MURPHY, E.M.; VAN WOERDEN, H.; DAME, T.M. "A Sensitive Search for Molecular Gas in High-Velocity Clouds." ApJ 488: 216-223,1997.

62 WALKER, C.E.; BECHTOLD, J.; BLACK, J.H. "CO Emission from QSO Absorption Line Systems." IAU Symp. 170 (poster vol., NRAO): 134-139,1997.

WALKER, R.C. "Kiloparsec-Scale Motions in 3C 120 — Revisited." ApJ 488: 675-681,1997.

WALKER, R.C. "Parameters of Disks from VLBI Observations." IAU Colloq. 163: 591-599,1997.

WALLACE, B.J.; LANDECKER, TX.; TAYLOR, A.R.; PINEAULT, S. "The HI Environment of Filled-Centre Supernova Remnants. I. G 74.9+1.2." A&A 317: 212-222,1997.

WALLER, W.H.; BOHLIN, R.C.; CORNETT, R.H.; FANELLI, M.N.; FREEDMAN, W.L.; HUX, J.K.; MADORE, B.F.; NEFF, S.G.; OFFENBERG, J.D.; O'CONNELL, R.W.; ROBERTS, M.S.; SMITH, A.M.; STECHER, T.P. "Ultraviolet Signatures of Tidal Interaction in the Giant Spiral Galaxy M101." ApJ 481:169-173,1997.

WALTER, F.; BRINKS, E.; DURIC, N.; KLEIN, U. "A Dynamical Analysis ofthe H H Galaxy H Zwicky 33 and Its Low Surface Brightness Companion." AJ 113: 2031-2045,1997.

WALTMAN, E.B.; FOSTER, R.S.; POOLEY, G.G.; GHIGO, F.D. "The Evolution of Outbursts in Cygnus X-3." Vistas Astron. 41: 43-47,1997.

WARDLE, J.F.C.; BROWN, L.F.; ROBERTS, D.H.; PHILLIPS, R.B.; DOELEMAN, S.S. "Polarization Sensitive Observations with the CMVA." In: Millimeter-VLBI Science Workshop (Haystack, ed. Barvainis & Phillips): 63-67,1997.

WARDLE, J.F.C; PERLEY, R.A.; COHEN, M.H. "Observational Evidence Against Birefringence Over Cosmological Distances." Phys. Rev. Lett 79: 1801-1804,1997.

WEHRLE, A.E.; KEEL, W.C; JONES, DX. "The Nature ofthe Optical 'Jets' in the Spiral Galaxy NGC 1097." AJ 114: 115-121, 1997.

WEILER, K.W.; VAN DYK, S.D.; PANAGIA, N.; SRAMEK, R.A.; MONTES, MJ. "On the Possible Use of Radio Supemovae for Distance Determinations." In: Extragalactic Distance Scale (Cambridge, ed. Livio et al): 212-223,1997.

WELLS, D.C. "Speculations on the Future of FITS." ADASS 6: 257-260,1997.

63 WHITE, R.L.; BECKER, R.H.; HELFAND, D.J.; GREGG, M.D. "A Catalog of 1.4 GHz Radio Sources from the FIRST Survey." ApJ 475: 479-493,1997.

WIKLIND, T.; COMBES, P. "Molecular Absorption Lines at High Redshift: PKS 1413+135 (z= 247)." A&A 328: 48-68,1997.

WILLSON, R.F.; KILE, J.N.; ROTHBERG, B. "Very Large Array Observations of Evolving Noise Storm Sources on the Sun." Solar Phys. 170: 299-320,1997.

WILNER, D.J.; REID, M.J.; MENTEN, K.M.; MORAN, J.M. "The Synchrotron Jet from the H20 Maser Source in W3(OH)" IAU Symp. 182 (poster vol): 193-194,1997.

WISEMAN, J.J.; PUTMAN, M.E.; HO, P.T.P. "H-H Ejecta and the Heating ofthe Orion Ridge." IAU Symp. 182 (Posters): 1997 http://www-laog.obs.ujf-grenoble.fr/meetings/iau 182/posterbook/.

WISEMAN, JX; PUTMAN, M.E.; HO, P.T.P. "VLA Ammonia (3,3) Observations of Heated and High Velocity Gas in Orion-KL." In: Star Formation Near and Far (AIP, ed. Holt & Mundy): 391-394,1997.

WOLF-CHASE, G.A.; GREGERSEN, E. "Possible Infall Around the Intermediate-Mass Young Stellar Object NGC 2264 IRS." ApJ 479: L67-L70,1997.

WOLLACK, E.J.; DEVLIN, M.J.; JAROSIK, N.; NETTERFIELD, C.B.; PAGE, L.; WILKINSON, D. "An Instrument for Investigation ofthe Cosmic Microwave Background Radiation at Intermediate Angular Scales." ApJ 476:440-457,1997.

WOMACK, M.; FESTOU, M.C; STERN, S.A. "The Heliocentric Evolution of Key Species in the Distantly-Active Comet C/1995 01 (Hale-Bopp)" AJ 114: 2789-2795,1997.

WOMACK, M.; STERN, S.A.; FESTOU, M.C "Millimeter-Wavelength Spectroscopy of CO, HCN, H2CO, and H3OH in C/1996 B2 (Hyakutake)" Planet Space Sci. 45: 711-715,1997.

WOODNEY, L.M.; MCMUIXIN, J.; AIIEARN, M.F. "Detection of OCS in Comet Hyakutake (C/1996 B2)" Planet Space Sci. 45: 717-719,1997.

64 WOODNEY, L.; MCMULUN, J.; AIIEARN, M.; SAMARASDSfHA, N. "Comet C/1995 Ol (Hale-Bopp)" IAU Circ 6607:29 March 1997.

WYROWSKI, F.; SCHILKE, P.; HOFNER, P.; WALMSLEY, CM. "Carbon Radio Recombination Lines in the Orion Bar." ApJ 487: L171-L174, 1997.

XIE, G.Z.; BRINKMANN, W.; CHA, G.W.; LAURENT-MUEHLEISEN, S.; ZHANG, Y.H.; LI, K.H.; BAI, J.M.; LIU, F.K. "Discovery of Five New X-ray Selected BL Lacertae Objects and Three New Quasars." IAU CoUoq. 159:423-424,1997.

XU, W.; WEHRLE, A.E.; MARSCHER, A.P. "VLBA Monitoring of Three Gamma-Ray Bright Blazars: AO 0235+164,1633+382, (4C 38.41) & 2230+114 (CTA 102)" Compton Symp. 4: 1437-1441,1997.

YOUNG, L.M.; LO, K.Y. "The Neutral Interstellar Medium in Nearby Dwarf Galaxies. H. NGC 185, NGC 205, and NGC 147." ApJ 476: 127-143,1997.

YOUNG, L.M.; LO, K.Y. "The Neutral Interstellar Medium in Nearby Dwarf Galaxies, ffl. Sagittarius DIG, LGS 3, and Phoenix." ApJ 490: 710-728,1997.

YUN, M.S.; SCOVILLE, N.Z.; CARRASCO, J.J.; BLANDFORD, R.D. "Resolution and Kinematics of Molecular Gas Surrounding the Cloverleaf Quasar at z = 2.6 Using the Gravitational Lens." ApJ 479: L9-L13,1997.

YUN, M.S.; VERDES-MONTENEGRO, L.; DEL OLMO, A.; PEREA, J. "Molecular Gas and Infrared Emission in HCG 31 and HCG 92 (Stephen's Quintet) and Tidal Interactions in Compact Group Environment." ApJ 475: L21-L24,1997.

YUSEF-ZADEH, F.; ROBERTS, D. A.; WARDLE, M. "Anomalous Motion of Ionized Gas in the Sickle (GO. 18-0.04) Near the Galactic Center." ApJ 490: L83-L86,1997.

YUSEF-ZADEH, F.; WARDLE, M.; PARASTARAN, P. "The Nature ofthe Faraday Screen Toward the Galactic Center Nonthermal Filament G359.54+0.18." ApJ475:L119-L122,1997.

ZAMANOV, R.; PAREDES, J.M.; MARTI, J.; MARKOVA, N. "Ha and Radio Observations of LSI+610303." Ap&SS 243:269-274, 1997.

65 ZENSUS, J.A. "Parsec-Scale Jets in Extragalactic Radio Sources." ARAA 35: 607-636,1997.

ZHANG, Q.; HO, P.T.P. "Dynamical Collapse in W51 Massive Cores: NH3 Observations." ApJ 488: 241-257,1997.

ZHANG, Q.; WOOTTEN, A.; HO, P.T.P. "Isotopic CO Images Near the Young Triple Star GSS 30." ApJ 475: 713-719,1997.

ZHANG, S.N.; MIRABEL, I.F.; HARMON, B.A.; KROEGER, R.A.; RODRIGUEZ, L.F.; HJELLMING, R.M.; RUPEN, M.P. "Galactic Black Hole Binaries: Multifrequency Connections." Compton Symp. 4:141-162,1997.

ZHAO, J.-H.; ANANTHARAMAIAH, K.R.; GOSS, W.M.; VIALLEFOND, F. "High-Density, Compact H H Regions in the Starburst Galaxies NGC 3628 & IC 694: High-Resolution VLA Observations ofthe H92a Radio Recombination Line." ApJ 482:186-202,1997.

ZHENG, X. "VLBI Observation of OH Masers in G 45.07+0.13." Chinese Ast Astrophys. 21:182-190,1997 Translation of: Acta Ast Sinica 37: 387-395,1996. ZWAAN, M.; BRIGGS, F.; SPRAYBERRY, D. "An H I Selected Sample of Galaxies: The HI Mass Function and the Surface Brightness Distribution." PASA 14:126-129,1997. ZWAAN, M.A.; BRIGGS, F.H.; SPRAYBERRY, D.; SORAR, E. tThe HI Mass Function of Galaxies from a Deep Survey in the 21 Centimeter Line." ApJ 490: 173-186,1997.

66 ADDITIONS TO THE 1996 PUBLICATIONS LIST

ARZOUMANIAN, Z.; JOSHI, K.; RASIO, F.A.; THORSETT, S.E. "Orbital Parameters ofthe PSR B1620-26 Triple System." IAU Colloq. 160: 525-530,1996.

CONWAY, J.E. "HI Absorption in CSO and SSC Radio Sources." In: Gigahertz Peaked Spectrum and Compact Steep Spectrum Radio Sources 2 (Leiden, ed. Snellen at al): 198-207,1996.

COTTON, W.D. "Where Is the Core in 3C286?" In: Gigahertz Peaked Spectrum and Compact Steep Spectrum Radio Sources 2 (Leiden, ed. Snellen at al): 78-84,1996.

DALLACASA, D.; MEDICI, A.; SCHILIZZI, R.T.; RENDONG, N.; FANTI, C; FANTI, R.; SPENCER, R.E. "Global VLBI Images of Compact Peaked-Spectrum Radio Sources at 327 MHz." In: Gigahertz Peaked Spectrum and Compact Steep Spectrum Radio Sources 2 (Leiden, ed. Snellen at al): 85-91,1996.

EDGE, A.C.; JONES, M.; SAUNDERS, R.; POOLEY, G.; GRAINGE, K. "GPS Sources with High Peak Frequencies." In: Gigahertz Peaked Spectrum and Compact Steep Spectrum Radio Sources 2 (Leiden, ed. Snellen at al): 43-47,1996.

FANTI, C; VIGOTTO, M.; DI PAOLO, C. "A Complete Sample of CSS/GPS from the B3-VLA Survey." In: Gigahertz Peaked Spectrum and Compact Steep Spectrum Radio Sources 2 (Leiden, ed. Snellen at al): 38-42,1996.

LUDKE, E.; SANGHERA, H.S.; DALLACASSA, D.; COTTON, W.D. "High-Frequency Observations of CSS at VLBI Resolutions." In: Gigahertz Peaked Spectrum and Compact Steep Spectrum Radio Sources 2 (Leiden, ed. Snellen at al): 100-103,1996.

MANTOVANI, F.; JUNOR, W.; BONDI, M.; FANTI, R.; PADRIELLI, L.; COTTON, W.; SALERNO, E.; NICOLSON, G.D. "Large Bent Jets in the Inner Region of CSSs." In: Gigahertz Peaked Spectrum and Compact Steep Spectrum Radio Sources 2 (Leiden, ed. Snellen at al): 216-221,1996.

PADIN, S.; WOODY, D.P.; STERN, J.A.; LEDUC, H.G.; BLUNDELL, R.; POSPIESZALSKI, M.W. "An Integrated SIS Mixer and HEMT IF Amplifier." IEEE Tr. MTT 44: 987-990,1996.

POHL, M.; REICH, W.; SCHLICKEISER, R.; REICH, P.; UNGERECHTS, H. "Radio Observations ofthe Gamma-Ray Blazer Q 0528+134." A&AS 120: 529-532,1996.

67 POLATIDIS, A.G.; WILKINSON, P.N. "Superluminal Motion in the Parsec-Scale Jet in 3C 380." In: Gigahertz Peaked Spectrum and Compact Steep Spectrum Radio Sources 2 (Leiden, ed. Snellen at al): 110-118,1996.

ROTTGERING, H.; BEST, P.; CARILLI, C; LONGAIR, M. "High Redshift CSS Radio Galaxies." In: Gigahertz Peaked Spectrum and Compact Steep Spectrum Radio Sources 2 (Leiden, ed. Snellen at al): 48-57,1996.

SNELLEN, I.A.G.; SCHILIZZI, R.T.; DE BRUYN, A.G.; MILEY, G.K.; BREMER, M.N.; ROTTGERING, H.J.A. "A Population Study of Faint GPS Sources from WENSS." In: Gigahertz Peaked Spectrum and Compact Steep Spectrum Radio Sources 2 (Leiden, ed. Snellen at al): 28-37,1996.

SHRADER, C.R.; WAGNER, R.M.; HJELLMING, R.M.; STARRFIELD, S.G. "Reprocessing of Hard X-ray Emission in X-ray Novae." A&AS 120: 261-263,1996.

STANGHELLDSH, C; DALLACASA, D.; O'DEA, C.P.; BAUM, S.A.; FANTI, R.; FANTI, C "VLBI Morphology of GHz-Peaked-Spectrum Sources." In: Gigahertz Peaked Spectrum and Compact Steep Spectrum Radio Sources 2 (Leiden, ed. Snellen at al): 4-13,1996.

TAYLOR, G.B.; UDOMPRASERT, P.; PEARSON, T.J.; ROBERTS, D.H. "The Parsec-Scale Rotation Measure Structure ofthe CSS Quasar OQ 172." In: Gigahertz Peaked Spectrum and Compact Steep Spectrum Radio Sources 2 (Leiden, ed. Snellen at al): 92-99, 1996.

TAYLOR, G.B.; VERMEULEN, R.C; READHEAD, A.C.S.; PEARSON, T.J.; HENSTOCK, D.R.; WILKINSON, P.N. "The Present Age and Predicted Evolution of Compact Symmetric Objects." In: Gigahertz Peaked Spectrum and Compact Steep Spectrum Radio Sources 2 (Leiden, ed. Snellen at al): 263-272,1996.