/ 7I- / NATIONAL RADIO ASTRONOMY OBSERVATORY QUARTERLY REPORT July 1, 1995 - September 30, 1995 uw TABLE OF CONTENTS A. TELESCOPE USAGE .............................. .................................................. 1 B. 140 FOOT OBSERVING PROGRAMS ............................................................... 1 C. 12METERTELESCOPE ............................................................................. 3 D. VERY LARGE ARRAY .............................................................................. 4 E. VERY LONG BASELINE ARRAY ................................................ .................. 17 F. SCIENCE HIGHLIGHTS..................................... ......................................... 23 G. PUBLICATIONS.....................................................................................24 H. CHARLOTTESVILLE ELECTRONICS ............................................................... 24 I. GREEN BANK ELECTRONICS ............................ ....................... .................... 25 J. TUCSON ELECTRONICS ............................................................................. 26 K. SOCORRO ELECTRONICS ............................................... .............................. 27 L. OBSERVATORY COMPUTING AND AIPS................................................................ 29 M. AIPS++ ........................................... ................................................. 30 N. SOCORRO COMPUTING ............................................................................. 31 0. VLBA STATUS.....................................................................................32 P. GREEN BANK TELESCOPE PROJECT .................................... .. ........................... 32 Q. PERSONNEL................................................................. ...................... 35 APPENDIX A. PREPRINTS 1 A. TELESCOPE USAGE The following telescopes have been scheduled for research and maintenance in the following manner during the third quarter of 1995. 140 Foot 12 Meter VLA VLBA Scheduled observing (hours) 1672.00 653.75 1736.9 1006 Scheduled maintenance and equipment changes 312.75 6.00 233.1 336 Scheduled tests and calibration 212.00 1536.25 244.1 332 Time lost 59.50 57.50 86.8 40.6 Actual observing 1612.50 596.25 1650.1 965.4 B. 140 FOOT OBSERVING PROGRAMS The following continuum programs were conducted during this quarter. No Observer(s) Program D18 6 de Pater, I. (Calif., Berkeley) 21 cm monitoring of the Comet-Jupiter crash. Heiles, C. (Calif., Berkeley) Maddalena, R. Wong, M. (Calif., Berkeley) The following line programs were conducted during this quarte;r. No. Observer(s) Pro,4r am A12 3 Azcarate, I. (IAR, Argentina) 21 cm search for new evidence of the warping in the galactic Cersosimo, J. (Univ. Puerto Rico) plane. Part II. Wilkes, L. (Univ. Puerto Rico) B609 Bania, T. (Boston) X-band measurements of the cosmic abundance of 'He. Rood, R. (Virginia) Balser, D. B643 3 Braatz, J. (Maryland) Monitoring of H20 megamasers in active galaxies. Wilson, A. (Maryland) G343 3 Gibson, S. (Wisconsin) 21 cm mapping of galactic neutral hydrogen in the Pleiades Wood, D. region. Holdaway, M. Nordsieck, K. (Wisconsin) No. Observer(s) Program 273 Lockman, F. J. HI mapping of Ursa Major. Liszt, H. 18 cm observations for C II and CH toward Zeta Ophiuchi. L305 Lucas, R. (IRAM) M385 Murphy, E. (Virginia) The magnetic field in galactic HI. Lockman, F. J. M391 Magnani, L. (Georgia) A search at 3.335 GHz for CH emission from diffuse Hartmann, D. (CFA) molecular gas. Dame, T. (CFA) Thaddeus, P. (CFA) P176 Patel, N. (Massachusetts) Monitoring a water maser system towards IC 1396 region. Goldsmith, P. (Cornell) S399 Shah, R. (Boston) C91 a studies of photodissociation regions: Density and Bania, T. (Boston) temperature structure of the partially ionized medium. Jackson, J. (Boston) T359 Thaddeus, P. (CFA) H2C7 search toward TMC-1 and IRC+10216. V082 Verschuur, G. (Rhodes College) Tests of a new 18 cm feed to measure the Zeeman effect in thermal OH sources. W280 Wootten, H. A. H20 monitoring in star forming cores in Rho Oph. The following pulsar programs were conducted during this quarter. No. Observer(s) Program Al 16 Arzoumanian, Z. (Cornell) Observations at 550 MHz of the orbital fluctuations in the Nice, D. eclipsing pulsar. Al 18 Arzoumanian, Z. (Cornell) Bimonthly timing of 63 pulsars at 810 MHz. Nice, D. Taylor, J. (Princeton) Taylor, H. (Princeton) B617 Backer, D. (Calif., Berkeley) Pulsar timing array observations at 800 and 1395 MHz. Sallmen, S. (Calif., Berkeley) Foster, R. (NRL) Matsakis, D. (NRL) B644 Backer, D. (Calif., Berkeley) Pulsar flux density and pulse morphology observations at Zepka, A. (Calif., Berkeley) 3 GHz. Sallmen, S. (Calif., Berkeley) No. Observer(s) M386 McKinnon, M. A 1.3-1.8 GHz polarization model test and timing of young Fisher, J. R. pulsar PSR B 1823-13. S400 Sayer, R. (Princeton) 370 MHz timing observations of a new relativistic binary Taylor, J. (Princeton) pulsar. Nice, D. S401 Sayer, R. (Princeton) 370 MHz observations measuring the relativistic effects in Shrauner, J. (Princeton) binary pulsars and timing of recently discovered pulsars. Camilo, F. (Princeton) Taylor, H. (Princeton) Taylor, J. (Princeton) Thorsett, S. (Princeton) Arzoumanian, Z. (Cornell) Nice, D. C. 12 METER TELESCOPE The following line programs were conducted during this quarter. Observer(s) Program A129 Apponi, A. (Arizona State) Evaluating the nitrogen/oxygen chemical network: additional Ziurys, L. (Arizona State) mapping of NO and N20 in Sgr B2. B648 Bieging, J. (Arizona) Mapping CO emission toward four AGB stars. E61 Evans, A. (Hawaii) CO (1-0) observations of powerful radio galaxies detected by Sanders, D. (Hawaii) IRAS. Mazzarella, J. (Caltech) H305 Hughes, D. (Oxford) A CO survey of the only complete sample of high-redshift Rawlings, S. (Oxford) radio galaxies. Dunlop, J. (Liverpool) Eales, S. (Cardiff) H306 Hughes, D. (Oxford) Study of blue compact galaxies as templates for high-redshift galaxies: the gas-to-dust ratio in a low metallicity environment. K350 Kutner, M. (RPI) A new look at molecular ring clouds. Mead, K. (Union College) L304 Liszt, H. 13CO and CS maps of Sgr D and Sgr E. L313 Charnley, S. (NASA/Ames) Study of methanol in IRC+10216. Latter, W. (NASA/Ames) M394 Murphy, E. (Virginia) A search for molecular gas in galactic high velocity clouds. 044 Young Owl, R. (Illinois) Determination of the structure of the molecular gas in the Meixner, M. (Illinois) reflection nebula NGC 2023. 4 No. Observer(s) Program T350 Turner, B. Sulfur chemistry of translucent clouds: a search for SO}. T358 Tielens, A. (NASA/Ames) Study of the physical conditions and carbon budget around Boogert, A. (Leiden) YSOs with ice bands. Wesselius, P. (Groningen) van Dishoeck, E. (Leiden) Latter, W. (NASA/Ames) W350 Welch, G. (St. Mary's Univ., N.S.) Study of molecular gas and star formation in NGC 205. Mitchell, G. (St. Mary's Univ., N.S.) Sage, L. (Nature) W356 Walker, C. K. (Arizona) Study of the effects of clustered star formation on molecular Narayanan, G. (Arizona) outflow activity. D. VERY LARGE ARRAY Third quarter 1995 was spent in the following configurations: A configuration from July 1 to September 5, and BnA configuration from September 5 to September 31. No. Observer(s) Program AA187 Akujor, C. (MPIR, Bonn) Polarization observations of compact steep spectrum sources Garrington, S. (Manchester) at 22 GHz. 1.3 cm AA188 Anglada, G. (Barcelona) Imaging of thermal jets in low luminosity molecular outflow Estallella, R. (Barcelona) sources. 3.6 cm Villuendas, E. (Barcelona) Rodriguez, L. (Mexico/UNAM) Girart, J. (CFA) Torrelles, J. (IAA, Andalucia) AA189 Acord, J. (MPIR, Bonn) Water masers in UC HII regions: disks or outflows? 1.3 cm Hofner, P. (Koln) Afflerbach, A. (Wisconsin) Churchwell, E. (Wisconsin) Walmsley, C.M. (Koln) AA193 Anantharamaiah, K. (Raman Institute) Recombination lines from external galaxies. 20 cm line Roy, A. (Raman Institute) Goss, W. M. Zhao, J.-H. (SA/IAA, Taiwan) AB705 Burke, B. (MIT) Time delay of the gravitational lens 0957+561. 3.6, 6 cm Becker, D. (MIT) Lehar, J. (CFA) Hewitt, J. (MIT) Roberts, D. (Brandeis) No. Observer(s) AB740 Baum, S. (STScI) Three archetypical Seyferts: MKN 6, NGC 3079, MKN 231. Colbert, E. (Maryland) 6, 20 cm O'Dea, C. (STScI) Pedlar, A. (Manchester) AB746 Birkinshaw, M. (CFA) HI absorption line feature in NGC 6251. 20 cm Worrall, D. (CFA) AB747 Baan, W. (NAIC) Nuclear dynamics of NGC 6240. 20 cm Uglesich, R. (Columbia) Haschick, A. (Haystack) AB748 Braatz, J. (Maryland) Mapping of H20 megamasers in active galaxies. 1.3 cm Wilson, A. (STScI) AB749 Barthel, P. (Groningen/Kapteyn) Beamed 60 micron radiation in lobe dominated quasars? 1.3, Hoekstra, H. (Groningen/Kapteyn) 2, 6 cm Hes, R. (Groningen/Kapteyn) AB750 Barthel, P. (Groningen/Kapteyn) High redshift quasar morphologies. 6, 20 cm Lonsdale, C. (Haystack) Vestergaard, M. (CFA) Miley, G. (Leiden) AB751 Butler, B. Goldstone/VLA radar imaging of Mercury. 3.6 cm Muhleman, D. (Caltech) Slade, M. (JPL) AB755 van Breugel, W. (LLNL) Deep VLA imaging of two z - 1 radio galaxies. 3.6, 6 cm Dey, A. (LLNL) Dickinson, M. (STScI) Spinrad, H. (Calif., Berkeley) AB756 Bagchi, J. (NCRA, India) A peculiar radio source. 6, 20 cm Chandra, I. (NCRA, India) Kapahi, V. (NCRA, India) AB759 Browne, I. (Manchester) Ring and halo in the gravitational lens B0218+357. 6, 20 cm Wilkinson, P. (Manchester) Sykes, C. (Manchester) AB760 Browne, I. (Manchester) Deep imaging of the new quadruple lensed system 1608+656. Wilkinson,