v NATIONAL RADIO ASTRONOMY OBSERVATORY Charlottesville, Virginia October 1, 1979 - December 31, 1979 RESEARCH PROGRAMS 140-Foot Telescope Hours Scheduled observing 1916.00 Scheduled maintenance and equipment changes 177.00 Scheduled tests and calibration 51.00 Time lost due to: equipment failure 26.50 power 65.00 weather 7.25 interference 0.00 The following line programs were conducted during this quarter. Observer(s) Program F. J. Lockman Observations at 1425 MHz of H166 in the galactic plane and in the Rosette Nebulae. R. Giovanelli (NAIC, Puerto Rico) Observations of 21-cm hydrogen in M. Haynes (NAIC, Puerto Rico) sections of the northern Magellanic Stream. B. Balick (Washington) Search for 21-cm hydrogen in emission E. Skillman (Washington) from Irr I galaxies. C. Bernes (Stockholm Observatory) Observations of 2-cm H 2 CO in the A. Sandqvist (Stockholm Observa- molecular clouds p Oph and CrA to use in tory) conjunction with 2-mm data to determine R. Loren (Texas) the spatial variation of density. H. Wootten (Caltech) N. Evans (Texas) Studies of the density distribution and R. Loren (Texas) mass spectrum of fragments in selected R. Snell (Texas) molecular clouds by the observation of H. Wootten (Caltech) 2-cm H2 CO. M. Reid (Center for Astrophysics) Studies of the time variations of H2 0 P. Bowers masers in late type stars at 22.4 GHz. Ra V JAN 1 6 1980 Observer(s) Program M. Cohen (Cornell) Search at 5.625 GHz for H2180 maser emis- B. Turner sion during the "flare" phase of the Ori (KL) H2 0 maser. P. Bowers Studies of 18-cm OH emission from un- identified Type II OH/IR Stars. K. Fox (Tennessee) Observations of interstellar methane and D. Jennings (NASA, Greenbelt) cyanodiacetylene radio emission lines found in the frequency range of 18.5-21.9 GHz. The following continuum programs were conducted during this quarter. Observer(s) Program C. Crannell (NASA, Greenbelt) Observations at several frequencies be- R. Hobbs (NASA, Greenbelt) tween 1-2 GHz of the flare star ZY S. Kahler (American Science Canis Minoris, coordinated with other and Engineering) observations. W. B. Burton (Minnesota) Observations at 1 GHz to search for evi- H. Liszt dence of the tilted fundamental inner galaxy gas distribution in thermal and nonthermal radiation. W. B. Burton (Minnesota) Observations at 1 GHz of the galactic W. Jaffe disk. H. Liszt M. Kundu (Maryland) Search for 1.3-cm radio emission from P. Bowers cool stars. The following very-long baseline programs were conducted, and the stations used in the experiments are coded as follows: A Algonquin, Canada, 150-ft K - Haystack, 120-ft B MPIR, Bonn, FRG, 100-m 0 - OVRO, 130-ft C Chilbolton, England, 25-m P - Arecibo, 1000-ft E Jodrell Bank, England, 250-ft R - Simeis, USSR, 22-m F Harvard/Fort Davis, 85-ft S - Onsala, Sweden, 84-ft G NRAO, 140-ft Observer(s) Program M. Claussen (Iowa) Observations of 1665, 1667 MHz OH emis- J. Fix (Iowa) sion from long period variable stars with R. Mutel (Iowa) telescopes F, P, and G. J. Benson R. Porcas (MPIR, Bonn) Observations at 2.8-cm of the quasar 0723+67 with telescopes B, C, K, O, and G. R. Linfield (Caltech) Observations at 2.8-cm of the nuclei of radio galaxies with telescopes A, B, F, K, O, and G. J. Romney (MPIR, Bonn) Observations at 2.8-cm of high redshift R. Preston (JPL) QSO's with telescopes B, F, K, O, and G. R. C. Walker (Caltech) K. Kellermann (MPIR, Bonn) Observations at 2.8-cm of the nuclear B. Geldzahler (Pennsylvania) components of Cyg A and 3C 154 with T. Menon (NASA, Greenbelt) telescopes at B and G. R. Booth (Jodrell Bank) Observations at 610 MHz to monitor sus- P. Wilkinson (Jodrell Bank) pected low-frequency variables and to A. Readhead (Caltech) map selected bright sources with tele- scopes J, F, O, and G. L. Kogan (Inst. for Space Research, Observations at 22 GHz of proper motions Moscow) in strong H20 maser sources with telescopes V. Kostenko (Inst. for Space Re- B, R, S, K, O, and G. search, Moscow) L. Matveyenko (Inst. for Space Re- search, Moscow) B. Ronnang (Chalmers, Sweden) D. Downes (MPIR, Bonn) R. Genzel (Center for Astrophys.) J. Moran (Center for Astrophys.) M. Reid (Center for Astrophys.) K. Kellermann (MPIR, Bonn) Observations at 3.6 and 13-cm to test I. Pauliny-Toth (MPIR, Bonn) the capabilities of the Mark III VLBI T. Clark (NASA, Greenbelt) system and to observe the structure of R. Coates (NASA, Greenbelt) galactic nuclei, low surface brightness C. Ma (NASA, Greenbelt) objects, radio stars, and to improve J. Ryan (NASA, Greenbelt) astrometric and geodetic measurements D. Shaffer (Phoenix Corp.) with telescopes B, S, K, O, and G. Observer(s) Program (continued) N. Vandenberg (NASA, Greenbelt) C. Knight (Haystack) H. Hinteregger (Haystack) E. Nesman (Haystack) A. Rogers (Haystack) A. Whitney (Haystack) W. Cotton (MIT) B. Corey (MIT) C. Counselman (MIT) T. Herring (MIT) I. Shapiro (MIT) J. Wittels (MIT) D. Robertson (NGS, Rockville) R. Lacasse B. Rayhrer W. Cotton (MIT) Observations at 13-cm of the twin M. Gorenstein (MIT) quasars 0957+56.1 with telescopes B, K, J. Marcaide (MIT) 0, and G. I. Shapiro (MIT) R. Preston (JPL) K. Kellermann (MPIR, Bonn) Studies at 6-cm of quasar proper motion A. Witzel (MPIR, Bonn) with telescopes B, K, O, and G. M. Reid (Center for Astrophys.) D. Shaffer (Phoenix Corp.) F. Owen M. Davis (Center for Astrophys.) Observations at 6-cm of the small scale A. Haschick (Center for Astrophys .) structure of the twin quasar 0947+56.1 A. E. Lilley (Harvard) with telescopes B, K, O, and G. J. Moran (Center for Astrophys.) T. Pearson (Caltech) Observations at 6-cm to continue the A. Readhead (Caltech) hybrid mapping of a complete sample of sources which may be new superliminal sources with telescopes F, H, O, and G. M. Cohen (Caltech) Observations to monitor superluminal A. Moffet (Caltech) sources at 6-cm with telescopes B, F, 0, T. Pearson (Caltech) and G. A. Readhead (Caltech) R. Simon (Caltech) G. Seielstad (Caltech) R. C. Walker (Caltech) Observer(s) Program A. Witzel (MPIR, Bonn) Observations at 6-cm to investigate the S. Neff (Virginia) spatial structure of a complete sample K. Johnston (NRL) of compact radio sources with telescopes J. Spencer (NRL) B, F, K, N, O, and G. E. Waltman (NRL) R. Brown E. Fomalont R. Perley R. C. Walker J. Cordes (Massachusetts) Observations at 18-cm to test whether 10 K. Johnston (NRL) selected sources are inhomogeneous synchro- T. Jones (Minnesota) tron sources or sources which produce S. Spangler synchrotron radiation from a relativistic Maxwellian electron distribution, with telescopes F, 0, and G. 300-Foot Telescope Ho urs Scheduled observing 17 28.50 Scheduled maintenance and equipment changes 1 36.50 Scheduled tests and calibration 2 25.00 Time lost due to: equipment failure 27.25 power 52.75 weather 0.00 interference 0.00 The following line programs were conducted during this quarter. Observer(s) Program R. Terlevich (Inst. of Astronomy, Measurements of the 21-cm hydrogen con- Cambridge) tent of blue compact objects discovered C. Hazard (Inst. of Astronomy, on the 1.2 meter U.K. Schmidt objective Cambridge) prism plates. T. Thuan (Virginia) G. Martin (Virginia) L. Davis (Toronto) Studies of 21-cm hydrogen in isolated E. Seaquist (Toronto) and interacting galaxies. D. Burstein Survey the thinnest galaxies found in the Uppsala General Catalog for 21-cm hydrogen. K. Lo (Caltech) Studies of 21-cm hydrogen in dwarf C. Kowal (Caltech) galaxies. J. Pier (Caltech) W. Sargent (Caltech) Observer(s) Program W. Ford (DTM) Studies of the extent of 21-cm hydrogen V. Rubin (DTM) in high luminosity spiral galaxies. N. Thonnard (DTM) B. M. Lewis (Carter Observatory, Observations of 21-cm hydrogen in Shapley New Zealand) Ames and other galaxies. D. Hogg Mapping of 21-cm hydrogen surrounding three Wolf-Rayet N-type stars. T. Bania (NAIC, Puerto Rico) Measurements of the scale height of F. J. Lockman galactic HI. The following continuum programs were conducted during this quarter. Observer(s) Program T. Balonek (Massachusetts) Polarization and flux density measure- W. Dent (Massachusetts) ments of variable radio sources at C. O'Dea (Massachusetts) 2695 MHz. C. Crannell (NASA, Greenbelt) Observations at 4 four discrete freq- R. Hobbs (NASA, Greenbelt) quencies between 250 and 500 MHz of the S. Kahler (American Science and flare star ZY Canis Minoris coordinated Engineering) with other observations. J. Cordes (Cornell) Interstellar scintillation measurements J. Dickey of compact sources at 850 MHz. The following pulsar programs were conducted during this quarter. Observer(s) Program P. Backus (Massachusetts) Observations at 410, 610, and 850 MHz J. Taylor (Massachusetts) to determine periods, period deriva- M. Damashek tives, positions and dispersion measures of known pulsars. J. Taylor (Massachusetts) Observations to complete a Northern M. Damashek Hemisphere pulsar search at 410 MHz. 36-Foot Telescope Hours Scheduled observing 1965.50 Scheduled maintenance and equipment changes 94.50 Scheduled tests and calibration 100.00 Time not scheduled 48.00 Time lost due to: telescope 5.50 equipment 45.00 weather 53.50 power 2.00 interference 0.00 Observer(s) Program A. Barrett (MIT) Study of CO in small reflection nebulae. R. Buxton (MIT) W. B. Burton (Minnesota) Study of the thickness of CO in the inner H. Liszt galaxy. E. Churchwell (Wisconsin) Observations of methyl formate at C. Winnewisser (MPIR) 90 GHz. C. Walmsley (MPIR) W. Dent (Massachusetts) Evolution of extragalactic radio sources R. Hobbs (NASA, Greenbelt) at millimeter wavelengths. L. Denoyer (Cornell) Study of shocked CO within the super- nova remnant IC 443.