Quarterly Report, April 1
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NATIONAL RADIO ASTRONOMY OBSERVATORY QUARTERLY REPORT April 1,1996 - June 30,1996 TABLE OF CONTENTS A. TELESCOPE USAGE .............................................................. 1 B. 140 FOOT OBSERVING PROGRAMS ................................................ 1 C. 12 METER TELESCOPE OBSERVING PROGRAMS .................................... 3 D. VERY LARGE ARRAY OBSERVING PROGRAMS ..................................... 7 E. VERY LONG BASELINE ARRAY OBSERVING PROGRAMS ........................... 15 F. SCIENCE HIGHLIGHTS ........................................................... 22 G. PUBLICATIONS ................................................................ 23 H. CHARLOTTESVILLE ELECTRONICS ............................................... 23 I. GREEN BANK ELECTRONICS .................................................... 25 J. TUCSON ELECTRONICS ......................................................... 26 K. SOCORRO ELECTRONICS........................................................ 27 L. COMPUTING AND AIPS.......................................................... 30 M . AIPS++ .................................................... .................... 32 N. GREEN BANK TELESCOPE PROJECT ............................................... 32 O. PERSONNEL .................................................................... 33 APPENDIX A. PREPRINTS A. TELESCOPE USAGE The following telescopes have been scheduled for research and maintenance in the following manner during the second quarter of 1996. 140 Foot 12 Meter VLA VLBA Scheduled Observing (hrs) 1728.75 1751.25 1685.5 1012 Scheduled Maintenance and Equipment Changes 169.50 64.75 239.5 379 Scheduled Tests and Calibration 263.75 335.25 291.0 412 Time Lost 39.50 87.00 48.9 50 Actual Observing 1689.25 1664.25 1636.6 962 B. 140 FOOT OBSERVING PROGRAMS The following continuum programs were conducted during this quarter. N._o. Observer(s) Program D191 de Pater, I. (Calif., Berkeley) Observations of the aftermath of the comet Shoemaker-Levy Heiles, C. (Calif., Berkeley) with Jupiter crash. Maddalena, R. Millan, R. (Calif., Berkeley) Wong, M. (Michigan) The following line programs were conducted during this quarter. No. Observer(s) Prosas B654 Barnbaum, C. Observations of OH masers associated with the extraordinary Morris, M. (UCLA) star, U Equ. Omont, A. (IAP, Paris) B657 Balser, D. Observations of ionized helium in diffuse HII regions. Lockman, F. J. B659 Burton, W. B. (Leiden) 21 cm measurements toward weak shoulders on HI spectra observed near b = 0. B663 Brown, R. Observations at 1.7 and 3 GHz for detections of HI fine Wiseman, J. structure emission at high redshift. Schulman, E. Cox, C. (Virginia) C305 Carilli, C. Redshifted HI 21 cm line observations of red quasars and red Menten, K. (CFA) gravitational lenses. Reid, M. (CFA) Rupen, M. Stocke, J. (Colorado/JILA) No. Observer(s) Pryogam D190 Dickey, J. (Minnesota) A search for OH emission at 18 cm from diffuse molecular Elliot, E. (Minnesota) clouds. H304 Haynes, M. (Cornell) 21 cm spectra ofredshift independent distances to spiral Giovanelli, R. (Cornell) galaxies. L320 Lockman, F. J. 21 cm HI observing and data reduction procedures testing. Murphy, E. (Virginia) M385 Murphy, E. (Virginia) The magnetic field in galactic HI. Lockman, F. J. T348 Thuan, T. (Virginia) 21 cm observations of the influence of local environment on Martin, J-M. (Meudon) the physical properties of dwarf galaxies. Karachentseva, V. (Kiev) The following pulsar programs were conducted during this quarter. No. Observer(s) Pro ram A118Al 18 Arzoumanian, Z. (Cornell) Bi-monthly timing of 63 pulsars at 550, 800, 1420, and Nice, D. 1660 MHz. Taylor, J. (Princeton) Taylor, H. (Princeton) A128 Arzoumanian, Z. (Cornell) A 1.4 GHz directed search for radio pulsars in the first maps of Cordes, J. (Cornell) the NRAO VLA sky survey. Gregg, M. (LLNL) Becker, R. (Calif., Davis) Nice, D. Sayer, R. (]Princeton) A132 Arzoumanian, Z. (Cornell) Monitoring at 575 MHz of the evolution of the PSR B1957+20 Nice, D. eclipsing binary system. B617 Backer, D. (Calif., Berkeley) Pulsar timing array observations at 800 and 1395 MHz. Sallmen, S. (Calif., Berkeley) Foster, R. (NRL) Matsakis, D. (NRL) F132 Foster, R. (NRL) Timing measurements of two new millisecond pulsars found in Wolszczan, A. (Penn State) the Arecibo high latitude survey. Cadwell, B. (Penn State) Anderson, S. (Penn State) F133 Fruchter, A. (STScI) Timing observations of a new, bright, fast pulsar. Eder, J. (NAIC) No. Observer(s) P0rn L317 Lundgren, S. (NRL) Joint radio and x-ray observations of the fluctuations of the Cordes, J. (Cornell) Crab pulsar. Arzoumanian, Z. (Cornell) Hankins, T. (NMIMT) Moffett, D. (NMIMT) Finley, J. (Purdue) M386 McKinnon, M. A 1.3-1.8 GHz polarization model test and timing of young Fisher, J. R. pulsar PSR B 1823-13. Z139 Zepka, A. (Calif., Berkeley) A 1.4 GHz search for the radio pulsars associated with SNR Backer, D. (Calif., Berkeley) G78.2+2.1. Nice, D. The following very long baseline programs were conducted with Green Bank telescopes this quarter. No. Observer(s) Progra C293 Clark, T. (NASA/GSFC) 140 Foot, 85-3, and 20 meter Green Bank geodetic ties. Ryan, J. (NASA/GSFC) Gordon, D. (Hughes/STX) Himwich, W. (NVI, Inc.) Varney, D. (NVI, Inc.) Vandenberg, N. (NVI, Inc.) VT002 Okayasu, R. (ISAS, Japan) VSOP scheduling test. C. 12 METER TELESCOPE OBSERVING PROGRAMS The following line programs were conducted during this quarter. No. Observer(s) Proram B653 Butner, H. (DTM/Carnegie) Tracing interstellar deuterium fractionation pathways. Charnley, S. (NASA/Ames) Lada, E. (Maryland) B657 Boselli, A. (Paris Obs) CO (1-0) in a complete sample of spiral galaxies in the Coma Gavazzi, G. (Brera Obs) supercluster. Lequeux, J. (Paris Obs) Buat, V. (Marseille) Donas, J. (Marseille) Casoli, F. (Paris Obs) C296 Clancy, R. T. (Colorado/JILA) Mars dust storm observations. Sandor, B. (Colorado/JILA) C300 Combes, F. (Paris Obs) A search for 02 at z = 0.685 at 70 GHz. Wiklind, T. (Chalmers, Onsala) 4 No. Observer(s) Proaa C303 Caselli, P. (CFA) Search for quiescent massive molecular dense cores in Chen, H. (CFA) Orion B. Myers, P. (CFA) CB05 Bower, G. (Calif., Berkeley) Study of a dramatic flare in the extremely flat-spectrum QSO Backer, D. (Calif., Berkeley) NRAO 530. Wright, M. (Calif., Berkeley) CDO3 Doeleman, S. (Haystack) Imaging and evolution of radio galaxy 3C 111. CDO4 Doeleman, S. (Haystack) 3 mm VLBI observations of the galactic center. Rogers, A. (Haystack) Bower, G. (Calif., Berkeley) Backer, D. (Calif., Berkeley) Wright, M. (Calif., Berkeley) CLO2 Lonsdale, C. (Haystack) A large-scale 3 mm VLBI survey. Doeleman, S. (Haystack) Phillips, R. (Haystack) F134 Frayer, D. (Toronto) Study of molecular gas in chemically young IRAS galaxies. Thuan, T. (Virginia) Seaquist, E. (Toronto) G350G Gensheimer, P. (WMPIR, Bonn) Observations of HCO* toward CIT 6. G351 Gensheimer, P. (MPIR, Bonn) Study of H20 toward NGC 7027. Henkel, C. (MPIR, Bonn) H317 Helfer, T. (Maryland) On-the-fly CO mapping of NGC 3628, NGC 4826, and M83. Blitz, L. (Maryland) H318 Holdaway, M. Verification of 3 mm continuum fluxes of bright quasars. 118 Irwin, J. (Virginia) Search for CO in the HI cloud between NGC 4472 and Frayer, D. (Toronto) UGC 7636. Sarazin, C. (Virginia) K353 Kutner, M. (unaffiliated) Study of the molecular content of dwarf spirals. Schombert, J. (NASA/GSFC) Pildas, R. (CFA) L316 Liszt, H. Study of CO8 0 emission around rho Ophiuchus. L321 Liszt, H. Study of galactic CO toward extragalactic sources. Lucas, R. (IRAM) M398 Mauersberger, R. (Arizona) Study of interstellar sulfur isotopes and oxygen burning in Henkel, C. (MPIR, Bonn) stars. Chin, Y. (Bonn U.) Observer(s) Proram No. Mauersberger, R. (Arizona) A search for interstellar Van der Waals complexes. M400 Havenith, M. (IAP, Bonn) Wilson, T. (MPIR, Bonn) P170 Pound, M. (Calif., Berkeley) An investigation of cluster formation in Orion. Lada, E. (Maryland) Mundy, L. (Maryland) Gruendl, R. (Maryland) P180 Papadopoulos, P. (Toronto) Study of CO (2-1) in Markarian 10. R265 Robinson, B. (Northwestern) Search for high density molecular gas at -5 km/s toward OH Yusef-Zadeh, F. (Northwestern) masers surrounding the galactic center SNR G359.1-0.5. S404 Sandor, B. (Colorado/JILA) Microwave spectroscopy of earth's atmosphere. Clancy, T. (Colorado/JILA) S409 Smith, B. (IPAC) CO (1-0) observations of low-luminosity Virgo spiral Madden, S. (NASA/Ames) galaxies. T362 Turner, B. How big can interstellar molecules get in translucent clouds? V86 van Dishoeck, E. (Leiden) Studying the youngest stellar regions: The evolution of Mundy, L. (Maryland) chemical morphologies. McMullin, J. (Arizona) Blake, G. (Caltech) Evans, N. (Texas) Mattingly, B. (Texas) V87 Yun, M. (CFA) Study of the molecular component of Hickson groups. Verdes-Montenegro, L. (IAA, Andalucia) Perea, J. (IAA, Andalucia) del Olmo, A. (IAA, Andalucia) W351 Wootten, H. A. Study of origin of broad formaldehyde line emission in Mangum, J. millimeter-bright, low-mass, star-forming regions. Wilking, B. (Missouri) W353 Williams, J. (Calif., Berkeley) Study of the clump structure in the Rosette molecular cloud. Blitz, L. (Maryland) W357 Womack, M. (Penn State) Study of carbon chemistry in Kuiper disk comets. Stern, A. (SWRI) W367 Wyckoff, S. (Arizona State) A 2 mm spectral-line survey of Comet Hale-Bopp (150- Ziurys, L. (Arizona State) 170 GHz). Kleine, M. (Arizona State) Wehinger, P. (Arizona State) 2 13 W370 Wyckoff, S. (Arizona State) 1 C/ C ratios in molecular clouds from CN: chemical Kleine, M. (Arizona State) processing in