NATIONAL RADIO ASTRONOMY OBSERVATORY

Observing Summary - 1985 Statistics

February 1986

NATIONAL RADIO ASTRONOMY OBSERVATORY

Observing Summary - 1985 Statistics

February 1986

Some Highlights of the 1985 Research Program

A radio image of the Cassiopeia A supernova remnant showing unprecedented detail was produced, which is the most complex image yet made by a radio-interferometer. Six centimeter observations from all four VLA configurations were combined and deconvolved by means of a supercomputer in order to produce a 0.2 arcsecond resolution image of the large diameter 6.1 arcminute field. Images from future epochs will allow detailed tracking of the expansion of the remnant and monitoring of the compact knots of emission that appear throughout as a result of the catastrophic explosive event that created the remnant approximately 300 years ago.

The 1400-MHz continuum survey of the entire sky within the -5° < 6 < + 82° declination band that was carried out on the 300-ft telescope in 1983 has produced a confusion limited atlas containing approximately 3000 sources per steradian stronger than 0.15 Jy. Available on FITS tapes that can be readily displayed and analyzed with standard AIPS programs, the atlas is comparable to the Palomar Sky Survey, its optical counterpart, as a standard reference for source identifications and variability studies.

The VLA continued to participate in ongoing search for gravitational lens candidates chosen from the 6-cm MIT-Green Bank survey with the 300-ft telescope. The seventh candidate to pass all the preliminary radio and optical observational tests was identified in 1985 as the complex triple source, 0023 + 171, with z = 0.946 and total angular separation of 5 arcseconds. Although the object is the closest gravitational lens candidate yet discovered, deep optical images do not reveal the faint lensing mass.

Observations at 18.3 GHz with the 140-ft telescope were critical to the identification of the C3H2 molecule (cyclopropenylidene) in the interstellar medium. The ubiquitous occurrence of this small organic ring molecule in the Galaxy makes it an important new tracer of physical and chemical conditions. A survey of a large number of sources detected the line in emission in cold dust clouds and in absorption in the direction of the galactic center. One-hundred forty foot observations have also detected the line in absorption in Cen A, suggesting that C3H2 may be widespread enough to study in many galaxies.

The first detailed maps of the distribution of OH in Halley's Comet were made by the VLA. While no OH was seen toward the coraetary nucleus, the molecular emission in the coma was non-uniformly distributed in several clumps. The detailed maps support comet models which predict the vaporization of coraetary H2O ice from the nucleus and the eventual dissociation of H2O into H and observable OH once it has been expelled from the immediate vicinity of the nucleus.

The detection rate of molecular shells surrounding Infrared, bright, evolved, red giant stars increased greatly as a result of the newly improved l-mm receiver on the 12-111 telescope. These shells provide ideal laboratories for studying the mass losing stages of stellar evolution through the measurement of mass loss rates, isotopic abundance ratios, molecular abundances, and dust-to¬ gas ratios. They contribute significant amounts of carbon and oxygen to the interstellar medium, as well.

Observing Hours

30 est-jest. est, est, est, est,

1976 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91

Calendar Year

1300-Foot 140-Foot ■ 12-Meter WM Interferometer W&VLA

Fig. 1. This figure shows the hours scheduled for observing on each telescope during the last decade.

Distribution of Scheduled Observing Time

12-Meter 140-Foot 300-Foot VLA

1976 77 78 79 80 81 82 83 84 85

Calendar Year

1976 77 78 79 80 81 82 83 84 85

Calendar Year

\NRAO Staff I Visitors

1976 77 78 79 80 81 82 83 84 85

Calendar Year

IB Testing and Calibration

1981 82 83 84 85

Calendar Year

Fig. 2. These graphs show the number of hours scheduled for calibration and for observing by the NRAO staff and by visitors on each telescope system during the last decade.

12-Meter Radio Telescope Summary

1976 1977 1978 1979 1980 1981

Calendar Year

1982 1983 1984 1985

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

Fig. 3. This summary for each quarter of the calendar year shows the percentage of time 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 4-6 weeks each summer during the wet season. This period is used for maintenance and upgrading of the instrument. During the last half of 1982 and most of 1983, the telescope was out of service for the replacement of the reflecting surface and its backup structure.

140-Foot Radio Telescope Summary

1976 1977

Observing

1978 1979 1980 1981

Calendar Year

1982 1983 1984 1985

Installation, Maintenance and Calibration Equipment Failure, Weather and Interference

Fig. 4. This summary for each quarter of the calendar year shows the percentage of time 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. Maior improvements to the telescope system include: 1977 - data processing computer and installation of the maser Cassegrain system; 1978 - tests of the deformable subreflector; 1980 - installation of the Model IV auto¬ correlation receiver; 1982 - beam efficiency and pointing tests at 1.3 cm; 1983 - brake overhaul and installation of the second channel of the upconverter/maser receiver.

300-Foot Radio Telescope Summary 100

80

60

o- 40

20

0

"S KS -\ V

/^ ̂ ^ A V

- A V /

r A f A V /- - ̂ - ^ "\ \, / A* ̂ -^ - ^ - v V \ U i- -

V { V - -

/ \

L A > \ -

v_ SS / /\ \_ _^ ̂ N ^< ■—■ y

/" ~N 7 \: ^

A V -J — — ̂

A ^ s - — -^ ̂

>1 y — -—.

•Observing

Calendar Year

Installation, Maintenance and Calibration Equipment Failure, Weather and Interference

Fig. 5. This summary for each quarter of the calendar year shows the percentage of time 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. During 1980 a new traveling feed was installed, in 1983 cables were replaced and the telescope was painted, and during 1985 N-S motion was added to the traveling feed.

Very Large Array Telescope Summary

1977 1978 1979 1980 1981

Calendar Year

1982 1983

— Construction Initial Observing and Testing

1984

• Observing

1985

Testing, Maintenance and Calibration Downtime

Fig. 6. This summary for each quarter of the calendar year shows the percentage of time 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. During 1977 and 1978 no distinction was made between astronomical and test observing. Time scheduled for completion of the construction was reduced to zero after the first quarter of 1981.

Full-Time Permanent Employees 450

400

350

300

&250 E

^ 200

150

100

50

1957 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89

Fiscal Year Calendar Year

Fig. 7. This figure shows the total number of NRAO full-time, permanent employees at the end of each year, projected into the future.

Number of People Observing With NRAO Telescopes

1959 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 Calendar Year

89 90

Fig. 8. This bar chart shows for each calendar year the number of NRAO permanent research staff and the number of research associates who use 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 come. The significant jump in these last two categories for 1981 reflects the increased use of the VLA.

10

Distribution of Telescope Time by Per Cent

12-meter 140-foot 300-foot VLA 1985 Summary

Visitors 50% 61% 45% 58% 54%

Students 8% 7% 17% 8% 10%

Permanent Staff 10% 17% 7% 8% 10%

Research Associates 1% 0% 7% 3% 3%

Tests and Calibrations 10% 7% 3% 13% 8%

Maintenance and Installation 20% 6% 12% 9% 12%

Holidays and Unscheduled 1% 2% 9% 1% 3%

11

Distribution of Scheduled Observing Programs in Various Research Areas, by Percent

12-meter 140-foot 300-foot VLA Overall

I. SOLAR SYSTEM --

Sun, Planets, Satellites, and Comets 3% 4% 5% 5% 4%

II. STELLAR —

Pulsars, X-ray Sources, Planetary Nebulae, 18% Circumstellar Shells, Supernova Remnants, Masers. Novae, Supernovae, and Stars

7% 9% 27% 15%

III. GALACTIC

Galactic Structure, Center, Molecular Clouds, HII Regions, Star Formation, Molecules, and Interstellar Medium

45% 33% 5% 15% 25%

IV. EXTRAGALACTIC —

Normal and Active Galaxies, Radio Galaxies, Clusters, Quasars, VLB Studies, Extra- galactic Molecules, and Cosmology

34% 56% 81% 53% 56%

12

Institutions from which Visitors Came to Use NRAO Telescopes during 1985

Telescope

Institution 12-m 140-ft 300-ft VLA

1. Anglo Australian Observatory 2. Aerospace Corp. (CA) 3. Alabama, U. of 4. Arcetri Ap. Obs. (Italy) 5. Arizona, U. of - Steward, L & P Lab.

6. Arizona State Univ. 7. Athens, U. of (Greece) 8. Beijing Ast. Obs. (P.R. of China) 9. Bell Labs. (NJ)

10. Bologna, U. of (Italy)

11. Bonn Univ. (FRG) 12. Bordeaux Obs. (France) 13. Boston Univ. (MA) 14. Brandeis Univ. (MA) 15. British Columbia, U. of (Canada)

16. Brookhaven Nat. Laboratories 17. Bureau de Longitudes (Paris) 18. Calgary, U. of (Canada) 19. California, U. of, Davis 20. California, U. of, Berkeley - Hat Creek Obs.

21. California, U. of, Irvine 22. California, U. of, Los Angeles 23. California, U. of, Santa Cruz - Lick Obs. 24. Caltech - OVRA, Mt. Palomar 25. Cambridge Univ. - Cavendish, Mullard, IOA

x X

X X X X X

13

Institution 12-m

Telescope

140-ft 300-ft VLA

26. Carleton College 27. Catania Univ. (Italy) 28. CFA - Harvard & SAO (MA) 29. Centre College 30. Ctr. of Nuclear Studies (Saclay, France)

31. Chalmers - Onsala Space Obs. (Sweden) 32. Chicago, U. of - Yerkes Obs. 33. CIerason Univ. 34. CSIR (Johannesburg, S. Africa) 35. Colgate Univ. (NY)

x x X X

36. Colorado, U. of - JILA (Boulder) 37. Columbia Univ. (NY) 38. Computer Tech. Assoc. 39. Cornell Univ. (NY) 40. CSIRO (Australia)

41. Dartmouth College 42. DAO - Dominion Ap. Obs. (Canada) 43. DRAO - Dominion Radio Ap. Obs. (Canada) 44. DTM - Carnegie Institute 45. Edinburgh, U. of (Scotland)

46. ESO - Eur. Southern Obs. (FRG; Chile) 47. ESOC (Damstadt, FRG) 48. ESTEC (Netherlands) 49. Fairborn Observatory 50. Florida, U. of

14

Institution 12-m

Telescope

140-ft 300-ft VLA

51. George Mason Univ. (VA) 52. Gottingen Acad. Sci. (FRG) 53. Grenoble, U. of (France) 54. Gronlngen, U. of - Kapteyn Lab. (Netherlands) 55. Hamburger Stemwarte (FRG)

x x X X X

56. Haverford College (PA) 57. Hawaii, U. of - Inst, of Astronomy 58. Haystack Obs. - NEROC 59. Howard Univ. (D.C.) 60. Illinois, U. of - Vermilion River Obs.

61. Imperial College (London) 62. Inst, of Astrophy. (Paris) 63. Inst, for Space Res. (USSR) 64. Inst, for A & A (Berlin, FRG) 65. Inst. Molecular Science (Okazaki, Japan)

66. Interferometrics, Inc. 67. Iowa, U. of (Iowa City) 68. Iowa State Univ. (Ames) 69. IRAM (France) 70. Itapetinga Obs. (Brazil)

x x X

X X

71. Johns Hopkins Univ. - Space Tel. Inst. 72. JPL - Goldstone (CA) 73. Kent, U. of (England) 74. Kentucky, U. of 75. KPNO - Kitt Peak Nat. Obs.

x x

X X

15

Institution 12-m

Telescope

140-ft 300-ft VLA

76. Kyoto Univ. (Japan) 77. Leicester, U. of (England) 78. Leiden, U. of - Huygens Lab. (Netherlands) 79. Los Alamos Scientific Lab. 80. Louisiana State Univ.

81. Maine, U. of 82. Manchester, U. of - Jodrell, Nuffield 83. Marseille Obs. (France) 84. Maryland, U. of - (Hark Lake Obs. 85. Massachusetts, U. of - Five College Obs.

x X X X X

86. Meudon Obs. (France) 87. Mexico, U. of - Inst, of Ast. (Mexico) 88. Michigan, U. of (Ann Arbor) 89. Milano (Italy) 90. Minnesota, U. of

x x

X X

91. Missouri, U. of (St. Louis) 92. MIT - Lincoln Labs. 93. Monash Univ. (Australia) 94. Montreal, U. of (Canada) 95. MPI (Heidelberg, FRG)

96. MPIPA (Munich, FRG) 97. MPIR (Bonn, FRG) 98. Mt. Stromlo Obs. (Australia) 99. Mt. Wilson & Las Campanas - Carnegie 100. Nagoya Univ. (Japan)

16

Institution 12-m

Telescope

140-ft 300-ft VLA

101. NAIC - Arecibo Obs. (P.R.) 102. Nanking, U. of (China) 103. NASA, Ames (CA) 104. NASA, Goddard - GSFC (Greenbelt, MD) 105. NASA, Inst, for Space Studies (NY)

x x X X

106. NBS - National Bureau Stds. 107. NFRA (Netherlands) 108. NMIMT - New Mexico Inst. Mining Tech. 109. New Mexico, U. of (Albuquerque) 110. New York Univ.

111. Nobeyama Observatory (Japan) 112. North Carolina, U. of 113. NRC - Algonquin, Herzberg (Canada) 114. NRL - Naval Research Labs. 115. NSF - National Science Foundation

116. Ohio State Univ. 117. Oklahoma, U. of 118. Oregon, U. of 119. Oxford, U. of (England) 120. Padova Observatory (Italy)

121. Peking Obs. (P.R. of China) 122. Penn State Univ. 123. Pittsburgh, U. of - Allegheny Obs. (PA) 124. Princeton Univ. - Inst. Adv. Studies (NJ) 125. Puerto Rico Univ.

x x X X X

17

Institution 12-m

Telescope

140-ft 300-ft VLA

126. Queen Mary College (England) 127. Queens Univ. (Canada) 128. Raman Institute (India) 129. Rensselaer Polytech Inst. (NY) 130. Rice Univ. (TX)

131. Royal Greenwich Obs. (England) 132. Royal Obs. - UKIRT (Scotland) 133. San Diego State Univ. (CA) 134. Solar Phys. Res. Corp. 135. Southampton, U. of

136. Stockholm Observatory (Sweden) 137. SUNY (all campi) 138. Sussex, U. of (England) 139. Sys. & Appl. Sci. Corp. 140. Tata Inst. - TIFR, RAC (India)

141. Tel-Aviv Univ. - Wise Obs. (Israel) 142. Texas, U. of, Austin - McDonald Obs. 143. Tokyo Univ. - Tokyo Ast. Obs. (Japan) 144. Toronto, U. of - D. Dunlap Obs. (Canada) 145. Tufts Univ. (MA)

x x X X X

146. Univ. College Cardiff (England) 147. Uppsala Astr. Obs. 148. USNO - U.S. Naval Obs. 149. Utrecht, U. of (Ast. Inst., Netherlands) 150. Utsunomiya Univ. (Japan)

18

Institution 12-m

Telescope

140-ft 300-ft VLA

151. Victoria, U. of (Canada) 152. Virginia, U. of 153. VPI & SU 154. Washington, U. of 155. Williams College (MA)

x x X

156. Wisconsin, U. of - Washburn Obs. 157. Wyoming, U. of 158. Yale Univ. (CT)

No. of Institutions 51 56 21 135

No. of Visitors No. of Students No. of Research Associates No. of Permanent Staff

97 156 35 451 18 29 12 80 2 0 3 8

Total Observers 128

All told, 675 visitors, including 110 students, from 158 institutions.

202 55 572

19

NRAO Student Program

1959 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87

Calendar Year

Fig. 9. This figure shows for each calendar year the number of Ph.D. students (salaried and non-salaried), co-op students, and summer undergraduate and graduate students who observed or worked at the NRAO during that year.

20

NRAO Front-End Box Status

TECHNICAL DATA SHEET NOVEMBER 1985

No. 12 PAGE 1 OF

Appllcftble Tdwoope

Frequency 500 K 25 Fat

Dipole Single Linear E-W.

Adjustable 8 K to 8000 K.

Reaovable diode Dicke switch. Reference tea- perature adjust¬ able froa 300 K to 40000 K.

Designed for pulsar, continuua, and line work. About 2 hours to change Dicke switch and feed hybrid. Frequency switching not available. Usable with 4-channel aultl- bandwidth receiver, all NRAO line receivers and digital continuua receiver.

Coe

(Oliver) 300-ft Traveling Feed

or

140-ft Clip-On

50-80 MHz

(4.6 a)

* 450 K - i 500 Kwtth Dicke switch.

2.5-4.0

« 5X Bandwidth.

Crossed- Dtpole.

Orthogonal Linear or reaovable quad hybrid at feed for RCP and LCP. 110-250 MHz

(1.7 ca) 2 200 K- 2 260 K with Dicke switch.

140 Broadband Crossed- Dtpole.

300-ft Traveling Feed

or

140-ft Clip-On

250-500 MHz (80 ca)

Transistor Dual- Channel

i 320 K. > 200 K wtth reaovable 330-450 MHz aapllflers.

250

Broadband Crosaed- Dtpole.

Orthogonal Linear or reaovable quad hybrid at feed for RCP and LCP.

Adjustable 1.5 K to 1500 K.

Reaovable diode Dicke switch. Designed for pulsar, continuua, and line work. About 2 hours to change Dicke switch

and feed hybrid. Frequency switching not available. Usable with 4-channel aultl- bandwidth receiver, all NRAO line receivers and digital continuua receiver.

Coe

(Oliver)

450-500 MHz

FCT top 50-80 K 50

300-ft New Trsveltng Feed Mount

300/140-ft Sterliac Mount

280-350 MHz Cooled Up- converter/ GASFET Aap Dual Channel

45-85 50 280-350 350-410 450-500

Cavity-backed Crossed dlpoles.

Dual Orthogonal Linear. IF Polariaeter or RF Hybrid for right and left circular polarization.

5 K Frequency switching. When installed on the 300-ft traveling feed, two feeds can be used: the 750-1000 MHz on the west end of the box and one of the others on the east end. Selection of one of the two feeds should take less than 5 ainutes. To change a feed requires three hours. Coe

(Shank)

350-410 MHz (80 ca) 60

450-500 MHz (60 ca)

Cooled Up- converter/ GASFET Aap Dual Channel

50-70 250 500-750 Scalar with Crossed

When installed in the Sterling aount on the 140-ft or 300-ft antennas, only one of the five feeds

280- 350 MHz 350- 410 MHz 450- 500 MHz 500- 750 MHz or 750-1000 MHz

can be used. To change feeds requires two hours on the 140-ft and three hours on the 300-ft.

500-750 MHz (48 ca)

750-1000 MHz (34 ca)

Cooled Up- converter/ GASFET Aap Dual Channel

50-90 250 750-1000

Scalar with Crossed Di poles.

300/140-ft 1.00-1.45 (25 cu)

(6/25 Rx)

Cooled FET Dual Channel

35 to 40 450 Single Beam Scalar.

Orthogonal Linear.

8K to 14 K

Frequency switching. Noise adding.

Part of 4.5-5.1 GHz receiver listed below. Feed change required to go to 6 cm.

Coe

(Shank)

21

TECHNICAL DATA SHEET

NOVEMBER 1985 No. 12 PAGE 2 OF 4

Applicable Telescope

Frequency (GHz)

Amplifier Type

System Temperature

(Kelvin)

3 dB Bandwidth

(MHz)

Feed Type

Polarization Calibration

Value Switching System Remarks Person

in Charge

140/300-ft 1.30-1.80 (19 ca) (23 ca) (22 ca) (18 ca)

Dual Channel Cooled FET

23-30 Up to 120

Feed Liaited

Three 2HE Single Beaa

1.30-1.36 1.36-1.43 1.60-1.72

Orth. Linear or Circular

2 K and 200 K

Frequency or polarization switching or noise adding.

Either circular or linear polarizations are selectable. Circular polarization requires adjustments horn the control room. Band change requires feed change, 2 to 3 hours.

Norrod

(Chestnut)

300/140-ft 2.695 (11 ca. 3-feed)

Uneooled GaAsFET 4 Channel

130 120 DSB

3 Horns Circular or Linear

4 K 300 K load or polarization, or beam.

Continuum receiver. On-axis horn has receivers on both polarizations. Four hours to change polarization.

Bradley

(Chestnut)

300/140-ft 2.9-3.5 (9 ca)

(10 ca)

Dual Channel Cooled FET

25-35 Up to 200 Feed liaited.

Two 2HE Single Beaa 2.90-3.15 3.15-3.40

Orthogonal Linear and Circular

Low 1.8 High 150

Frequency switching. Noise adding.

Band change requires feed change i 2-3 hrs. Circular polarization requires phase equaliz¬ ing adjustaents froa the control rooa. Frequency switching requires 50 as blanking tiae..

Bradley

(Chestnut)

300/140-ft 3.12-3.37

(9 ca)

Cooled Paraaps Dual Channel

65 Kload switched. 75 K beam switched.

250 Fixed

Tuned

Dual Beams offset by

3 HPBW, singly

polarized.

Identical Linear or Identical Circular or Orth. Circular

4 K

and

14 K

Cooled Dicke switches (latching ferrite) for load (20 K) switching or beaa switching with noise injection for bal¬ ancing; 10 Hz aaxi¬ aua rate.

Continuua use. Behrens (Jeffries)

300/140-ft 4.47-5.05 (6ca)

(6/25 Rx)

Cooled GaAsFET Dual Channel

50-60 580 Single Orth. Circular

or Orth. Linear 1.4 K or 12.8 K

Other polarization. Includes cooled FET's for 1.0—1.45 GHz. Feed change required to go to 25 cm.

Coe.

(Shank) Dual Beaa Offset 3 HPBW

Identical or Orth. Circular or Identical Linear

Beam switching.

140-ft Cassegrain

Two Receivers

4.7-7.2

(5 ca)

Upconverter Maser

30-50 60-300 Cassegrain Fixed Linear Circular VLB

3-7 K Frequency or Mutator Beam

T Frequency 8y8z

4.7- 4.9 40-50 4.9- 6.5 30-40 6.5- 7.2 40-50

Brockway

(Dunbrack)

7.8-11.2 (3 ca)

Upconverter Maser

35-80 60-300 Cassegrain Fixed Linear Circular VLB 3-7 K

Frequency or Nutator Beam

7.6- 8.5 50-80 8.5-11.2 35-45

12.0-16.2 (2 ca)

Upconverter Maaer

50-80 60-300 Cassegrain Fixed Linear 3-7 K Frequency or Nutator Beam

12.0-16.2 50-80

18.2-25.2 (1.4 ca)

Maser 40-70 60-300 Cassegrain Fixed Linear Circular VLB

2-6 K Frequency or Nutator Beam

18.2-25.2 40-70

22

TECHNICAL DATA SHEET

NOVEMBER 1985 No. 12 PAGE 3 OF H

AppUcaUe Telescope

Frequency (GHz)

Amplifier Type

System Temperature

(Kelvin)

Continuum Sensitivity

(Jansky /sec)

3 dB Bandwidth

Feed Type Polarization

Calibration Value

Switching System Remarks

Person in

Charge

12-m 70-116 Cooled Mixer

260-400 SSB

1.0 650 MHz Horn-Lens Dual Linear

10 K Nutating Subreflector

Cochran

12-a 90-115 SIS Approx. 100 To be 650 MHz Horn-Lens Dual

Linear 10 K Nutating Subreflector Laab

12-a 330-360 Cooled Mixer

1400-2000 SSB 12 650 MHz Horn-Lens

Single Linear -

Nutating Subreflector Payne

12-m 200-270 Cooled Mixer

500-1000 SSB

6 at 230 GHz

600 MHz Horn-Lens Dual Linear

- Nutating Subreflector

Range will be extended to 270- 300 later in 1985.

Payne

23

TECHNICAL DATA SHEET

NOVEMBER 1985 No. 12 PAGE 4 OF 4

Applicable Telescope

Frequency (GHz)

Amplifler Type

System Temperature

(Kelvin)

3dB Bandwidth

(MHz)

Feed Type Polarization

Calibration Value Switching System Remarks

Person in

Charge

VLA 308- 343

Uneooled Translator

250*

150**

3 MHz (limited by

interference)

Priae Focus***

Dual Orthogonal Circular

25*

10**

Noise injection. 9.6 Hz. 50 percent cycle.

* Antennas 8, 12, and 15. ** Six other antennas. *** Feed is off-axis on antennas 8 and 12.

Lille

VLA 1340- 1730

Cooled FET

60 55 Cassegrain Dual Orthogonal Circular

4 Noise injection. 9.6 Hz,

Lille

VLA 4500- 5000

Cooled

Cooled Paramp and FET

60 55 Cassegrain Dual Orthogonal Circular

4 Noise injection, 9.6 Hz. 50 percent cycle.

Lille

VLA 14 400- 15 400

Cooled FET

110 55 Cassegrain Dual Orthogonal Circular

7 Noise injection, 9.6 Hz. 50 percent cycle.

Lille

VLA 22 000- 24 000

Cooled Mixer

350 55 Cassegrain Dual Orthogonal Circular

20 Noise injection, 9.6 Hz, 50 percent cycle.

Lille

24

NRAO - Staff and Visitor Publications 1985

Aller, H. D. and Reynolds, S. P. "The Decrease with Time of the Radio Flux of the Crab Nebula," Astrophys. J., 293, L73-L75, 1985.

Aller, H. D. and Reynolds, S« P. "Evolution of the Centimeter Flux of 3C58 and the Crab Nebula." In: The Crab Nebula and Related Supernova Remnants. Ed. M. C. Kafatos and R. B. C. Henry. (Cambridge: Cambridge University Press, 1985) 75-79.

Anantharamalah, K. R.; Erlckson, W. C; and Radhakrlshnan, V. "Observations of Highly Excited Radio Recombination Lines Towards Cassiopeia A." Nature, 315, 647-649, 1985.

Andrews, M. D.; Basart, J. P.; and Lamb, R. C. "Observations of the Radio Source G6.6-0.1 Positionally Coincident with the W28 SNR." Astron. J., 90, 310-314, 1985.

Antonucci, R. R. J. "Extended Radio Emission Associated with Blazars." In: Active Galactic Nuclei. Ed. J. E. Dyson. (Manchester: Manchester University Press, 1985) 98-102.

Antonucci, R. R. J. "VLA Maps of 41 Radio Galaxies." Astrophys. J. Suppl. Ser., 59, 499-511, 1985.

Antonucci, R. R. J. and Miller, J. S. "Spectropolarimetry and the Nature of NGC 1068." Astrophys. J., 297, 621-632, 1985.

Antonucci, R. R. J. and Olszewski, E. W. "Radio Observations of IRAS Extreme Infrared Galaxies." Astron. J., 90, 2203-2206, 1985.

Antonucci, R. R. J. and Ulvestad, J. S. "Extended Radio Emission and the Nature of Blazars." Astrophys. J., 294, 158-182, 1985.

Archer, J. W. "A High Performance, 2.5-K Cryostat Incorporating a 100-120-GHz Dual Polarization Receiver. Rev. Sci. Instrum., 56, 449-458, 1985.

Archer, J. W. "Low-Noise Heterodyne Receivers for Near-MUlimeter-Wave Radio Astronomy." IEEE Proc, 73, 109-130, 1985.

Archer, J. W. and Crawford, M. J. Jr. "A Synthesised 90-120 GHz Signal Source." Microwave J., 28, 227-250, 1985.

25

Archer, J. W. and Faber, M. T. "High-Output, Single- and Dual-Diode Millimeter-Wave Frequency Doublets." IEEE Trans. Micro. Theory Tech., MTT-33: 533-538, 1985.

Armstrong, J. T. and Barrett, A. H. "High-Resolution Surveys of the Sagittarius A Molecular Cloud Complex in Ammonia, Carbon Monoxide, and Isocyanic Acid." Astrophys. J. Suppl. Ser., 57, 535-570, 1985.

Armstrong, J. T.; Ho, P. T. P.: and Barrett, A. H. "VLA Observations of Smooth, Rapidly Rotating NH3 in the Sagittarius A '15 km s~l Cloud1." Astrophys. J., 288, 159-163, 1985.

Baan, W. A. "Powerful Extragalactic Masers." Nature, 315, 26-31, 1985.

Baan, W. A.; Has chick, A. D.; and Schmelz, J. T. "The Fourth OH Megamaser: Markarian 273." Astrophys. J., 298, L51-L54, 1985.

Backer, D. C; Fomalont, E. B.; Goss, W. M.; Taylor, J. H.; and Weisberg, J. M. "Accurate Timing and Interferometer Positions for the Millisecond Pulsar 1937+16." Astron. J., 90, 2275-2280, 1985.

Barcia, A.; Gomez-Gonzalez, J.; Lockman, F. J.; and Planesas, P. "Radio Recombination Lines from the Galactic Plane in Cygnus." Astron. Astrophys., 147, 237-240, 1985.

Bartel, N. "Angular Diameter Determinations of Radio Supernovae and the Distance Scale." In: Supernovae as Distance Indicators. Ed. N. Bartel. (Berlin: SprInger-Verlag, 1985) 107-122.

Bartel, N.; Ratner, M. I.; Shapiro, I. I.; Cappallo, R. J.; Rogers, A. E. E.; and Whitney, A. R. "Investigation of Radiation from Pulsar PSR 0329+54 Using Mark III VLBI Observations." Astron. J., 90, 2532-2539, 1985.

Bartel, N.; Ratner, M. I.; Shapiro, I. I.; Capallo, R. J.; Rogers, A. E. E.; and Whitney, A. R. "Pulsar Astrometry via VLBI." Astron. J., 90, 318-325, 1985.

Bartel, N.; Rogers, A. E. E.; Shapiro, I. I.; Gorensteln, M. V.; Gwinn, C. R.; Marcalde, J. M.; and Weiler, K. W. "Hubble1s Constant Determined Using Very-Long Baseline Interferometry of a Supernova." Nature, 318, 25-30, 1985.

Barthel, P. D.; Miley, G. K.; Schlllzzl, R. T.; and Preuss, E. "Two-Epoch Observations of the Core Radio Structure in Extended Quasars." Astron. Astrophys., 151, 131-136, 1985.

26

Bastien, P.; Batrla, W.; Henkel, C; Pauls, T.; Wa 1msley, C. M.; and Wilson, T. L. "Formaldehyde Observations of OMC-1." Astron. Astrophys., 146, 86-94, 1985.

Batrla, W. and Menten, K. M. "A Rotating Gas Disk Around L1551 IRS 5? Astrophys. J., 298, L19-L20, 1985.

Baud, B.; Sargent, A. I.; Werner, M. W.; and Bentley, A. F. "Radio and Infrared Observations of OH/IR Stars at the Tangential Point and Near the Galactic Center." Astrophys. J., 292, 628-639, 1985.

Baum, S. A. and Elston, R. "One Arcminute Resolution Radio Observations of W50." In: The Crab Nebula and Related Supernova Remnants. Ed. M. C. Kafatos and R. B. C. Henry. (Cambridge: Cambridge University Press, 1985) 251-155.

Becker, R. H. and Helfand, D. J. "Discovery of a New Class of Nonthermal Radio Sources." Nature, 313, 115-118, 1985.

Becker, R. H. and Helfand, D. J. "Identification of G20.0-0.2 as a Crab-Like SNR." Astrophys. J., 297, L25-L28, 1985.

Becker, R. H.; Markert, T.; and Donahue, M. "Radio and X-ray Observations of Gil.2-0.3 and G41.1-0.3." Astrophys. J., 296, 461-468, 1985.

Becker, R. H. and White, R. L. "Nonthermal Radio Emission from HD 193793 and V410 Tauri." Astrophys. J., 297, 649-651, 1985.

Bell, M. B. and Matthews, H. E. "Detection of HCIJN in the Cold Dust Cloud TMC-1." Astrophys. J., 291, L63-L65, 1985.

Bennett, C. L.; Lawrence, C. R.; and Burke, B. F. "Source Counts at 5 Gigahertz from the MG Survey." Astrophys. J., 299, 373-374, 1985.

Bieging, J. H. and Cohen, N. "Multi Frequency Radio Images of L1551 IRS 5." Astrophys. J., 289, L5-L8, 1985.

27

Biretta, J. A.; Cohen, M. H.; Hardebeck, H. E.; Kaufmann, P.; Abraham, Z.; Perfetto, A. A.; Scalise, E. Jr.; Schaal, R. E.; and Silva, P. M. "Observations of 3C 273 with High North-South Resolution." Astrophys. J., 292, L5-L8, 1985.

Birkinshaw, M. and Davles, R. L. "The Orientation of the Rotation Axes of Radio Galaxies. I. Radio Morphologies of Bright Elliptical Galaxies." Astrophys. J., 291, 32-44, 1985.

Blitz, L. "Molecular Clouds In M31 and M33." Astrophys. J., 296, 481-491, 1985.

Bockelee-Mbrvan, D.; Crovisier, J.; Gerard, E.; Henkel, C; Jewell, P. R.; Snyder, L. E.; Clemens, C. A.; Molloy, A. R.; and Schloerb, F. P. "Radio Observations of OH in Comet Crommelin 1983n." Astron. J., 90, 2586-2590, 1985.

Bottinelli, L.; Fraix-Burnet, D.; Gouguenheim, L.; Kazes, I.; Le Squeren, A. M.; Patey, I.; Rickard, L. J; and Turner, B. E. "Mrk 273: a New OH Megamaser." Astron. Astrophys., 151, L7-L9, 1985.

Branch, D. and Cowan, J. J. "Radio Emission from the Site of Supernova 196Iv in NGC 1058." Astrophys. J., 297, L33-L36, 1985.

Bregman, J. N. "Diffusive Shock Acceleration and Quasar Photospheres." Astrophys. J., 288, 32-42, 1985.

Bregman, J. N.; Glassgold, A. E.; Huggins, P. J.; and Kinney, A. L. "X-ray Emission from Red Quasars." Astrophys. J., 291, 505-510, 1985.

Bridle, A. H. "Menu for an All-Purpose Source Model." NRAO Wksp. Proc, 2» 135-143, 1985.

Bridle, A. H. "Phenomenology of Extragalactic Radio Jets." NRAO Wksp. Proc., j>, 1-19, 1985.

Brown, R. D.; Godfrey, P. D.; Cragg, D. M.; Rice, E. H. N.; Irvine, W. M.; Friberg, P.; Suzuki, H.; Ohishi, M.; Kaifu, N.; and Mbrimoto, M. "Tricarbon Monoxide in TMC-l." Astrophys. J., 297, 302-308, 1985.

Browne, I. W. A.; Mantovani, F.; Mux low, T. W. B.; Padrielli, L.; and Romney, J. D. "The Variability and Radio Structure of 3C 159." Mon. Not. Roy. Astron. Soc, 213, 945-951, 1985.

28

Bums, J. 0.; Nelson, E. R.; White, R. A.; and Gregory, S. A. "X-ray Emission Possibly Coincident with the Radio Tail of PKS 0301-123." Astrophys. J., 291, 611-620, 1985.

Burton, W. B. "Leiden-Green Bank Survey of Atomic Hydrogen in the Galactic Disk. I. 1, v and b, v Maps." Astron. Astrophys. Suppl. Ser., 62, 365-643, 1985.

Burton, W. B. and te Lintel Hekkert, P. "Leiden-Green Bank Survey of Atomic Hydrogen in the Galactic Disk. II. Integrated Properties in 1, b Maps." Astron. Astrophys. Suppl. Ser., 62, 645-789, 1985.

Caillault, J.-P.; Chanan, G. A.; Helfand, D. J.; Patterson, J.; Nbusek, J. A.; Takalo, L. 0.; Bothun, G. D.; and Becker, R. H. "The Peculiar X-ray and Radio Star AS431." Nature, 313, 376-378, 1985.

Clark, F. 0.; Troland, T. H.; and Miller, J. S. "Polarization Properties and Time Variations of the SiO Maser Emission of W Hydrae." Astrophys. J., 289, 756-764, 1985.

Cohen, M.; Bieging, J. H.; Dreher, J. W.; and Welch, W. J. "The Binary System MWC 349." Astrophys. J., 292, 249-256, 1985.

Coleman, P. H. and Condon, J. J. "A High-Resolution VLA Survey of the a - 08h52m15s, 6 - +17° 16* Field." Astron. J., 90, 1431-1436, 1985.

Coleman, P. H.; Condon, J. J.; and Hazard, C. "Complete Samples of Active Extragalactic Objects. III. A 1411-MHz VLA Survey Centered on a » 08h54m, 6 - +17o30,." Astron. J., 90, 1437-1445, 1985.

Combes, F.; Boulanger, F.; Encrenaz, P. J.; Gerin, M.; Bogey, M.; Demuynck, C; and Destombes, J. L. "Detection of Interstellar CCD." Astron. Astrophys., 147, L25-L26, 1985.

Condon, J. J. and Broderick, J. J. "A 1400 MHz Sky Survey. I. Confusion-Limited Maps Covering 7h30,B

Cowan, J. J. and Branch, D. "Radio Detection of Historical Supernovae and H II Regions in M83." Astrophys. J., 293, 400-406, 1985.

Cowan, J. J. and Branch, D. "Radio Observations of Historical, Extragalactic Supernovae." In: Supernovae as Distance Indicators. Ed. N. Bartel. (Berlin: Springer-Verlag, 1985) 75-87.

Crovisier, J.; Dickey, J. M.; and Kazes, I. "21-cm Absorption Observations Towards a Cold Diffuse Cloud." Astron. Astrophys., 149, 209-212, 1985.

Crutcher, R. M. "Optical and Radio Study of the Taurus Molecular Cloud Toward HD 29647." Astrophys. J., 288, 604-617, 1985.

de Pater, I. and Dickel, J. R. "Saturn^ Rings Resolved by the VLA." IAU Colloq., 75, 71-74, 1985.

de Pater, I., Palmer, P., and Schenewerk, M. "Periodic Comet Halley (19821)." IAU Circ, 4142, 26 November 1985.

de Pater, I.; Schloerb, F. P.; and Johnson, A. H. "A Catalog of Radio Sources to be Occulted by Comets P/Halley and P/Giacobini-Zinner." Astron. J., 90, 846-868, 1985.

de Pater, I.; Wade, C. M.; Houpis, H. L. F.; and Palmer, P. "The Nondetection of Continuum Radiation from Comet IRAS-Araki-Alcock (1983d) at 2- to 6-cm Wavelengths and Its Implication on the Icy-Grain Halo Theory." Icarus, 62, 349-359, 1985.

de Vegt, C; Florkowski, D. R.; Johnston, K. J.; and Wade, C. M. "Stellar Radio Astrometry. II. Precise Optical Positions of Radio Stars in the FK4 System." Astron. J., 90, 2387-2389, 1985.

Dewey, R. J.; Taylor, J. H.: Weisberg, J. M.; and Stokes, G. H. "A Search for Low-Luminosity Pulsars." Astrophys. J., 294, L25-L29, 1985.

Dickel, J. R.; D'Odorico, S.; and Silverman, A. "VLA Observations of Three Extragalactic SNR at 20 and 6 cm." Astron. J., 90, 414-417, 1985.

30

Drake, S. A. "Radio Continuum Observations of O-M Giants and Supergiants and Inferred Ionized Mass Loss Rates." In: Mass Loss from Red Giants. Ed. M. Morris and B. Zuckerman. (Dordrecht: Reidel, 1985) 187-188.

Drake, S. A.; Abbott, D. C; Bieging, J. H.; Churchwell, E.; and Linsky, J. L. "VLA Observations of A and B Stars with Kilogauss Magnetic Fields." In: Radio Stars. Ed. R. M. Hjellndng and D. M. Gibson. (Dordrecht: Reidel, 1985) 247-252.

Drake, S. A.; Simon, T.; and Linsky, J. L. "A VLA Radio Continuum Survey of Active Late-Type Giants in Binary Systems: Preliminary Results." In: Radio Stars. Ed. R. M. Hjellmlng and D. M. Gibson. (Dordrecht: Reidel, 1985) 253-258.

Eckart, A.; Witzel, A.; Biermann, P.; Pearson, T. J.; Readhead, A. C. S.; and Johnston, K. J. "Milliarcsecond Structure of 1928+738: Apparent Superluminal Motion Along an Extended Jet?" Astrophys. J., 296, L23-L26, 1985.

Faber, M. T. and Archer, J. W. "Computer-Aided Testing of Mixers Between 90 GHz and 350 GHz." IEEE Trans. Micro. Th. Tech., MTT-33, 1138-1145, 1985.

Faber, M. T. and Archer, J. W. "Millimeter-Wave, Shot-Noise Limited, Fixed-Tuned Mixer." IEEE Trans. Micro. Th. Tech., MTT-33, 1172-1178, 1985.

Faber, M. T. and Archer, J. W. "A Very Low-Noise, Fixed-Tuned Mixer for 240-270 GHz." IEEE MTT-S Internat. Microwave Symp., 311-314, 1985.

Faber, M. T.; Archer, J. W.; and Mattauch, R. J. "A Frequency Doubler with 35% Efficiency at W Band." Microwave J., 28, 145-152, 1985.

Faber, M. T.; Archer, J. W.; and Mattauch, R. J. "A High Efficiency Frequency Doubler for 100 GHz." IEEE MTT-S Internat. Microwave Symp., 363-366, 1985.

Fabian, A. C., Arnaud, K. A.; Nulsen, P. E. J.; Watson, M. G.; Stewart, G. C; McHardy, I.; Smith, A.; Cook, B.; Elvis, M.; and Mushotzky, R. F. "An X-ray, Optical and Radio Study of PKS 0745-191: A Massive Cooling Flow." Mon. Not. Roy. Astron. Soc, 216, 923-932, 1985.

31

Feigelson, E. D. and Montmerle, T. "An Extremely Variable Radio Star in the Rho Ophiuchi Cloud." Astrophys. J., 289, L19-L23, 1985.

Feretti, L. and Giovannini, G. "The Short Wide Angle Tail Radio Source in NGC4874." Astron. Astrophys., 147, L13-L15, 1985.

Fey, A. L.; Spangler, S. R.; Mutel, R. L.; and Benson, J. M. "VLBI Observations at 22.2 Gigahertz of the Radio Source 0552+398 (DA 193)." Astrophys. J., 295, 134-138, 1985.

Fischer, J.; Sanders, D. B.; Simon, M.; and Solomon, P. M. "High-Velocity Gas Flows Associated with H2 Emission Regions: How Are They Related and What Powers Them?" Astrophys. J., 293, 508-521, 1985.

Fix, J. D. and Mutel, R. L. "A Search for Hydroxyl Masers in M33." Astron. J., 90, 736-737, 1985.

Florkowski, D. R.; Johnston, K. J.; Wade, C. M.; and de Vegt, C. "Stellar Radio Astrometry. I. Precise Positions of the Radio Emission of Twenty Stars." Astron. J., 90, 2381-2386, 1985.

Ford, H. C; Crane, P. C; Jacoby, G. H.; Lawrle, D. G.; and van der Hulst, J. M. "Bubbles and Jets in the Center of M51." Astrophys. J., 293, 132-147, 1985.

Garay, G.; Reld, M. J.; and Mo ran, J. M. "Compact H II Regions: Hydrogen Recombination and OH Maser Lines." Astrophys. J., 289, 681-697, 1985.

Gavazzi, G. and Jaffe, W. "Enhanced Star Formation in Cluster Galaxies." Astrophys. J., 294, L89-L92, 1985.

Gear, W. K.; Robson, E. I.; Ade, P. A. R.; Griffin, M. J.; Brown, L. M. J.; Smith, M. G.; Nolt, I. G.; Radostitz, J. V.; Veeder, G.; and Lebofsky, L. "Multifrequency Observations of Blazars. I. The Shape of the 1 Micron to 2 Millimeter Continuum." Astrophys. J., 291, 511-517, 1985.

Gil, J. "Fluctuations of Pulsar Emission with Sub-Microsecond Time-Scales." Astrophys. Space Sci., 110, 293-296, 1985.

Gil, J. "Interpulse Beams and Profile Components." Astrophys. J., 299, 154-160, 1985.

32

Gil, J. "A Model of Radio Emission from the Millisecond Pulsar PSR 1937+214." Astron. Astrophys., 143, 443-446, 1985.

Gil, J. and Rudnicki, W. "Depolarization of Emission of Some Pulsars." Astron. Astrophys., 147, 184-185, 1985.

Gil, J. and Rudnicki, W. "A Geometrical Depolarization of Pulsar Radiation." Astrophys. Space Sci., 109, 381-386, 1985.

Giovannini, G.; Feretti, L.; and Andemach, H. "VLA Observations of the Extended Source near Coma A." Astron. Astrophys., 150, 302-306, 1985.

Gordon, M. A. "The VLBA - A Continent-Size Radio Telescope." Sky Telesc, 69, 487-490, 1985.

Goss, W. M.; Schwarz, U. J.; van Gorkom, J. H.; and Ekers, R. D. "The Sgr A East HII at 1 ■ -0o.02, b « -0o.07." Mon. Not. Roy. Astron. Soc, 215, 69p-73p, 1985.

Goss, W. M. and Viallefond, F. "VLA Observations of Three M 33 Supernova Remnants at 20 cm." J. Astrophys. Astron., 6, 145-151, 1985.

Green, D. A. "Observations of Compact Radio Sources in the Galactic Plane." Mon. Not. Roy. Astron. Soc., 216, 691-700, 1985.

Greenfield, P. E.; Roberts, D. H.; and Burke, B. F. "The Gravitationally Lensed Quasar 0957+561: VLA Observations and Mass Models." Astrophys. J., 293, 370-386, 1985.

Guilloteau, S.; Baudry, A.; and Walmsley, C. M. "High Resolution Maps of the 2IIi/2Ja,l/20H Lines in W3(0H). Astron. Astrophys., 153, 179-188, 1985.

Gusten, R.; Walmsley, C. M.; Ungerechts, H.; and Churchwell, E. "Temperature Determination in Molecular Clouds of the Galactic Center." Astron. Astrophys., 142, 381-387, 1985.

Hamilton, A. J. S.; Saslaw, W. C; and Thuan, T. X. "Thermodynamics and Galaxy Clustering: Analysis of the Center for Astrophysics Redshift Catalog." Astrophys. J., 297, 37-48, 1985.

33

Hamilton, T. T.; Helfand, D. J.; and Becker, R. H. "A Search for Millisecond Pulsars in Globular Clusters." Astron. J., 90, 606-608, 1985.

Hanisch, R. J. and Ulmer, M. P. "Evidence for an Extensive Medium from Radio Observations of Distant Abell Clusters." Astron. J., 90, 1407-1412, 1985.

Haschick, A. D. and Baan, W. A. "Extragalactic High-Velocity Clouds: VLA Observations of the Broad Neutral Hydrogen Absorption in the Radio Galaxy 3C 293." Astrophys. J., 289, 574-581, 1985.

Haschick, A. D. and Baan, W. A. "A Very Bright Water Vapour Maser Source in NGC3079." Nature, 314, 144-146, 1985.

Haschick, A. D. and Ho, P. T. P. "Formation of OB Clusters: CO, NH3, and H2O Observations of the Distant H II Region Complex in SI28." Astrophys. J., 292, 200-205, 1985.

Havlen, R. J. "National Radio Astronomy Observatory (Annual Report, July 1983 - June 1984)." Bull. Am. Astron. Soc, 17, 319-357, 1985.

Helfand, D. J. and Becker, R. H. "Origin of the New Axisymmetric Radio Sources." Nature, 313, 118-119, 1985.

Helfand, D. J. and Becker, R. H. "Radio Observations of New and Used Crab-Like Supernova Remnants." In: The Crab Nebula and Related Supernova Remnants. Ed. M. C. Kafatos and R. B. C. Henry. (Cambridge: Cambridge University Press, 1985) 241-250.

Henkel, C; Matthews, H. E.; Morris, M.; Terebey, S.; and Fich, M. "Molecular Lines in IRC+10o216 and CIT 6." Astron. Astrophys., 147, 143-154, 1985.

Henry, J. P.; Clarke, J. T.; Bowyer, S.; and Lavery, R. J. "Characterization of X-ray Sources Detected in a Deep Einstein Exposure of the Field Around 3C 295." Astron. J., 90, 1425-1430, 1985.

Herman, J.; Baud, B.; and Habing, H. J. "VLA 6 cm Observations of OH/IR Stars." Astron. Astrophys., 144, 514-515, 1985.

34

Herman, J.; Baud, B.; Habing, H. J.; and Winnberg, A. "VLA Line Observations of OH/IR Stars." Astron. Astrophys., 143, 122-135, 1985.

Hermsen, W.; Wilson, T. L.; Walmsley, C. M.; and Batrla, W. "15NH3 in Orion-KL: The Hot Core is Not So Hot." Astron. Astrophys., 146, 134-138, 1985.

Hjellmlng, R. M. "The Radio Emission of W Cephei-Type Binaries." In: Radio Stars. Ed. R. M. Hjellmlng and D. M. Gibson. (Dordrecht: Reidel, 1985) 151-154.

Hjellmlng, R. M. "The Radio-Emitting Wind, Jet, and Nebular Shell of AG Pegasl." In: Radio Stars. Ed. R. M. Hjellmlng and D. M. Gibson. (Dordrecht: Reidel, 1985) 97-100.

Hjellmlng, R. M. and Johnston, K. J. "Radio Emission from Strong X-ray Sources." In: Radio Stars. Ed. R. M. Hjellmlng and D. M. Gibson. (Dordrecht: Reidel, 1985) 309-323.

Ho, P. T. P.; Jackson, J. M.; Barrett, A. H.; and Armstrong, J. T. "Interactions Between the Continuum Sources in the Galactic Center and Their Immediate Molecular Environment." Astrophys. J., 288, 575-579, 1985.

Hogg, D. E. "Resolution of the Radio Source y^- Vel." In: Radio Stars. Ed. R. M. Hjellmlng and D. M. Gibson. (Dordrecht: Reidel, 1985) 117-119.

Hollls, J. M.; Chin, G.; and Brown, R. L. "An Attempt to Detect Mass Loss from a Lyrae with the VLA." Astrophys. J., 294, 646-648, 1985.

Hollls, J. M.; Kafatos, M.; Michalitsianos, A. G.; and McAlister, H. A. "The R Aquaril System at Optical and Radio Wavelengths." Astrophys. J, 289, 765-773, 1985.

Huchra, J.; Gorensteln, M.; Kent, S.; Shapiro, I.; Smith, G.; Horine, E.; and Perley, R. "2237+0305: A New and Unusual Gravitational Lens." Astron. J., 90, 691-696, 1985.

Hughes, V. A. "Observational Evidence on the Early Development of Stars in Cepheus A." Astrophys. J., 298, 830-837, 1985.

35

Hummel, E. and Kotanyi, C. G. "SO Galaxies and the Influence of the Gas Content on the Radio Continuum Emission from a Disk Component." Astron. Astrophys., 145, 475-478, 1985.

Hunter, D. A. and Gallagher, J. S. III. "Irregular Galaxies with Extended HI Emission." Astron. J., 90, 1789-1795, 1985.

Hutchings, J. B. and Gower, A. C. "Evidence for Beamed Radiation from QSOs." Astron. J., 90, 405-409, 1985.

Inagaki, S. and Saslaw, W. C. "Equipartition in Multicomponent Gravitational Systems." Astrophys. J., 292, 339-347, 1985.

Jahoda, K.; McGammon, D.; Dickey, J. M.; and Lockman, F. J. "High-Latitude H I Structure and the Soft X-ray Background." Astrophys. J., 290, 229-237, 1985.

Jewell, P. R.; Schenewerk, M. S.; and Snyder, L. E. "Hie Detection of Rotationally Excited OH Emission Toward the Probable Young Planetary Nebula Vy 2-2." Astrophys. J., 295, 183-194, 1985.

Jewell, P. R.; Walmsley, C. M.; Wilson, T. L.; and Snyder, L. E. "New Detections of Maser and Thermal SiO Emission." Astrophys. J., 298, L55-L59, 1985.

Johnston, K. J.; de Vegt, C; Florkowski, D. R.; and Wade, C. M. "Stellar Radio Astrometry. III. Preliminary Comparison of the Radio Reference Frame and the Optical FK4-Based Reference Frame by the Use of Stellar Radio Emission." Astron. J., 90, 2390-2396, 1985.

Johnston, K. J.; Spencer, J. H.; and Bowers, P. F. "The Circumstellar H2O Maser Emission Associated with Four Late-Type Stars." Astrophys. J., 290, 660-670, 1985.

Johnston, K. J.; Wade, C. M.; Florkowski, D. R.; and de Vegt, C. "The Position of the Radio/Optical Emission from the Stars HR 1099 and UX Ari." Astron. J., 90, 1343-1348, 1985.

Jones, T. W.; Rudnick, L.; Aller, H. D.; Aller, M. F.; Hodge, P. E.; and Fiedler, R. L. "Magnetic Field Structure in Active Compact Radio Sources." Astrophys. J., 290, 627-636, 1985.

36

Kameswara Rao, N.; Venugopal, V. R.; and Patnaik, A. "VLA Observations of Extreme Hydrogen Deficient Stars." J. Astrophys. Astron., 69 153-157, 1985.

Keel, W. C. "A Radio-Quiet Emission-Line Jet in the Type 2 Seyfert Galaxy NGC 7682." Astron. J., 90, 577-581, 1985.

Keel, W. C. "Recognition and Classification of Galaxies with Optical Jets." Astron. J., 90, 2207-2217, 1985.

Kellermann, K. I. "Report of Commission 40, International Astronomical Union." IAU Trans., 19A, 549-580, 1985.

Kellermann, K. I. "Superluminal Radio Sources." Comments Astrophys., 11, 69-81, 1985.

Kellermann, K. I. and Thompson, A. R. "The Very Long Baseline Array." Science, 229, 123-130, 1985.

Kotanyi, C. "Radio Continuum Emission in the Virgo Cluster." In: ESO Workshop on the Virgo Cluster. Ed. O.-G. Richter and B. Binggeli. (Garching bei Munchen: European Southern Observatory, 1985) 13-22.

Kriss, G. A.; Becker, R. H.; Helfand, D. J.; and Canizares, C. R. "G27.4+0.0: A Galactic Supernova Remnant with a Central Compact Source." Astrophys. J., 288, 703-706, 1985.

Kronberg, P. P. "Discovery of an Entire Population of Radio Supernova Candidates in the Nucleus of Messier 82." In: Supernovae as Distance Indicators. Ed. N. Bartel. (Berlin: Springer-Verlag, 1985) 88-99.

Kronberg, P. P. "M82—A Nearby Laboratory for Rapid Star Formation and the Phenomena of Active Galactic Nuclei." In: Extragalactic Energetic Sources. Ed. V. K. Kapahi. (Bangalore: Indian Academy of Sciences, 1985) 163-170.

Kronberg, P. P.; Biermann, P.; and Schwab, F. R. "The Nucleus of M82 at Radio and X-ray Bands: Discovery of a New Radio Population of Supernova Candidates." Astrophys. J., 291, 693-707, 1985.

Kronberg, P. P. and Sramek, R. A. "Discovery of New Variable Radio Sources in the Nucleus of the Nearby Galaxy Messier 82." Science, 227, 28-31, 1985.

37

Kulkaml, S. R.; Dickey, J. M.; and He lies, C. "Measurement of Spin Temperatures in a Rapidly Moving HI Shell." Astrophys. J., 291, 716-721, 1985.

Kundu, M. R.; Gaizauskas, V.; Woodgate, B. E.; Schmahl, E. J.; Shine, R.; and Jones, H. P. "A Study of Flare Buildup from Simultaneous Observations in Microwave, Ha, and UV Wavelengths." Astrophys. J. Suppl. Ser., 57, 621-630, 1985.

Kundu, M. R. and Hjellmlng, R. M. "Summary of the Current and Future Problems in Radio Stars." In: Radio Stars. Ed. R. M. Hjellmlng and D. M. Gibson. (Dordrecht: Reidel, 1985) 397-402.

Kundu, M. R. and Lang, K. R. "The Sun and Nearby Stars: Microwave Observations at High Resolution." Science, 228, 9-15, 1985.

Kundu, M. R. and Shevgaonkar, R. K. "Microwave Emission from Late-Type Dwarf Stars UV Ceti and YZ Canis Minoris." Astrophys. J., 297, 644-648, 1985.

Kundu, M. R. and Shevgaonkar, R. K. "Multiwavelength Observations of the Preflare Solar Active Region Using the VLA." Astrophys. J., 291, 860-864, 1985.

Kutner, M. L.; Machnlk, D. E.; Mead, K. N.; and Evans, N. J. II. "High-Resolution Studies of the H II Region/Molecular Cloud Interface in NGC 1977." Astrophys. J., 299, 351-372, 1985.

Kwok, S. "High-Resolution Radio Observations of Compact Planetary Nebulae." Astron. J., 90, 49-58, 1985.

Kwok, S.; Purton, C. R.; Matthews, H. E.; and Spoelstra, T. A. Th. "Radio Synthesis Observations of M2-9, The Butterfly Nfebula." Astron. Astrophys., 144, 321-326, 1985.

Landecker, T. L.; Higgs, L. A.; and Roger, R. S. "High-Resolution Radio Observations of the Supernova Remnants CTB 104A (G93.7-0.3) and 3C 434.1 (G94.0+1.0)." Astron. J., 90, 1082-1093, 1985.

Lang, K.; Willson, R.; and Pallivicini, R. "VLA Observations of Late-Type Stars." In: Radio Stars. Ed. R. M. Hjellmlng and D. M. Gibson. (Dordrecht: Reidel, 1985) 267-270.

38

Lawrence, C. R.; Readhead, A. C. S.; Linfield, R. P.; Payne, D. G.; Preston, R. A.; Schlllzzl, R. T.; Porcas, R. W.; Booth, R. S.; and Burke, B. F. "Strong Source VLBI Survey at 22 GHz." Astrophys. J., 296, 458-460, 1985.

Lester, D. F.; Dinerstein, H. L.; Werner, M. W.; Harvey, P. M.; Evans, N. J. II; and Brown, R. L. "Star Formation in the Inner Galaxy: A Far-Infrared and Radio Study of Two H II Regions." Astrophys. J., 296, 565-575, 1985.

Lestrade, J.; Mutel, R. L.; Preston, R. A.; and Phillips, R. B. "High-Angular Resolution Observations of Stellar Binary Systems." In: Radio Stars. Ed. R. M. Hjellmlng and D. M. Gibson. (Dordrecht: Reidel, 1985) 275-282.

Llndblad, P. 0.; Jorsater, S.; and Sandqvist, Aa. "The Nuclear Radio Sources in the Elliptical Galaxies NGC3309 and NGC3311 in the Cluster Abell 1060." Astron. Astrophys., 144, 496-501, 1985.

Linfield, R. P. "VLBI Observations of the Jet in Cygnus A." Astrophys. J., 295, 463-465, 1985.

Liszt, H. S. "Determination of Galactic Spiral Structure at Radiofrequencies." IAU Symp., 106, 283-300, 1985.

Liszt, H. S. "A Search for ©2 Toward NGC 7674." Astrophys. J., 298, 281-282, 1985.

Liszt, H. S. "Structure of Sagittarius C Observed at Radiofrequencies." Astrophys. J., 293, L65-L67, 1985.

Liszt, H. S.; Burton, W. B.; and van der Hulst, J. M. "Associations Between Neutral and Ionized Gas in Sgr A." Astron. Astrophys., 142, 237-244, 1985.

Liszt, H. S.; Burton, W. B.; and van der Hulst, J. M. "A High Resolution H I Absorption Spectrum of Sgr A." Astron. Astrophys., 142, 245-248, 1985.

Liszt, H. S. and Vanden Bout, P. A. "Upper Limits on-the O2/CO Ratio in TWo Dense Interstellar Clouds." Astrophys. J., 291, 178-182, 1985.

39

Little, L. T.; Dent, W. R. F.; Heaton, B.; Davies, S. R.; and White, G. J. "The Rotating Interstellar Disc in G35.2-0.74." Mon. Not. Roy. Astron. Soc, 217, 227-238, 1985.

Lo, K. Y.; Backer, D. C; Ekers, R. D.; Kellermann, K. I.; Reid, M.; and Moran, J. M. "On the Size of the Galactic Center Compact Radio Source: Diameter < 20 AU." Nature, 315, 124-126, 1985.

Loren, R. B. and Wootten, A. "High-Excitation Lines of Deuterated Formaldehyde (HDCO) in the Orion Molecular Cloud." Astrophys. J., 299, 947-955, 1985.

Machalski, J. and Condon, J. J. "A Complete Sample of Intermediate-Strength Radio Sources Selected from the GB/GB2 1400-MHz Surveys. V. VLA Observations of Very Extended and Confused Sources." Astron. J., 90, 5-29, 1985.

Machalski, J. and Condon, J. J. "The GB/GB2 Sample of 122 Intermediate-Strength Radio Galaxies." Astron. J., 90, 973-986, 1985.

Marcalde, J. M.; Bartel, N.; Cohen, N. L.; Gorensteln, M. V.; Shapiro, I. I.; Corey, B. E.; Rogers, A. E. E.; Bonometti, R.; Preston, R. A.; and Romney, J. D. "Simultaneous Dual-Wavelength VLBI Observations of the Compact Radio Source Near the Galactic Center." In: Active Galactic Nuclei. Ed. J. E. Dyson. (Manchester: Manchester University Press, 1985) 50-53.

Marcalde, J. M.; Bartel, N.; Gorensteln, M. V.; Shapiro, I. I.; Corey, B. E.; Rogers, A. E. E.; Webber, J. C; Clark, T. A.; Romney, J. D.; and Preston, R. A. "Quasar 4C39.25 is Not Contracting." Nature, 314, 424, 1985.

Marcalde, J. M.; Shapiro, I. I.; Corey, B. E.; Cotton, W. D.; Gorensteln, M. V.; Rogers, A. E. E.; Romney, J. D.; Schild, R.; Baath, L.; Bartel, N.; Cohen, N. L.; Clark, T. A.; Preston, R. A.; Ratner, M. I.; and Whitney, A. R. "The Quasars 1038+528 A and B." Astron. Astrophys., 142, 71-84, 1985.

Margulls, M. and Lada, C. J. "Masses and Energetics of High-Velocity Molecular Outflows." Astrophys. J., 299, 925-938, 1985.

Marscher, A. P. and Broderick, J. J. "MultIfrequency Radio VLBI Observations of the Superluminal Low-Frequency Variable Quasar NRAO 140." Astrophys. J., 290, 735-741, 1985.

40

Martin-Pintado, J.; Wilson, T. L.; Johnston, K. J.; and Henkel, C. "High-Resolution Maps of 6 Centimeter Formaldehyde: Clumping in Molecular Clouds." Astrophys. J., 299, 386-404, 1985.

Massi, M.; Felli, M.; and Simon, M. "Radio Continuum Observations of the Blister Type HII Region in MonR2." Astron. Astrophys., 152, 387-392, 1985.

Matthews, H. E.; Friberg, P.; and Irvine, W. M. "The Detection of Acetaldehyde in Cold Dust Clouds." Astrophys. J., 290, 609-614, 1985.

Matthews, H. E. and Irvine, W. M. "The Hydrocarbon Ring C3H2 is Ubiquitous in the Galaxy." Astrophys. J., 298, L61-L65, 1985.

Matthews, H. E.; Olnon, F. M.; Winnberg, A.; and Baud, A. "H2O Sources Near the Galactic Plane: A Pilot Systematic Survey." Astron. Astrophys., 149, 227-238, 1985.

Mauersberger, R.; Wilson, T. L.; Batrla, W.; Walmsley, C. M.; and Henkel, C. "Newly Discovered Sources of Non-metastable Ammonia." Astron. Astrophys., 146, 168-174, 1985.

Menon, T. K. and Hickson, P. "Radio Sources in Dense Groups." Astrophys. J., 296, 60-64, 1985.

Menten, K. M.; Johnston, K. J.; Wilson, T. L.; Walmsley, C. M.; Mauersberger, R.; and Henkel, C. "VLA Observations of the 92-10iA+ Methanol Masers Toward W3 (OH)." Astrophys. J., 293, L83-L85, 1985.

Mitchell, K. J. and Condon, J. J. "A Confusion-Limited 1.49-GHz VLA Survey Centered on a » 13h001!l37s, 6 - +30o34,." Astron. J., 90, 1957-1966, 1985.

Molnar, L. A.; Reid, M. J.; and Grindlay, J. E. "Confirmation of Radio Periodicity in Cygnus X-3." In: Radio Stars. Ed. R. M. Hjellmlng and D. M. Gibson. (Dordrecht: Reidel, 1985) 329-334.

Morris, M. and Yusef-Zadeh, F. "Unusual Threads of Radio Emission Near the Galactic Center." Astron. J., 90, 2511-2513, 1985.

Mutel, R. L.; Hodges, M. W.; and Phillips, R. B. "The Structure of Three Compact Double Radio Sources at 5 GHz." Astrophys. J., 290, 86-93, 1985.

41

Mutel, R. L. and Lestrade, J. F. "Radio Emission from RS CVn Binaries. I. VLA Survey and Period-Radio Luminosity Relationship." Astron. J., 90, 493-498, 1985.

Mutel, R. L.; Lestrade, J. F.; Preston, R. A.; and Phillips, R. B. "Dual Polarization VLBI Observations of Stellar Binary Systems at 5 GHz." Astrophys. J., 289, 262-268, 1985.

O'Dea, C. P. "Constraints on Bent Beams in Narrow Angle Tail Radio Sources." Astrophys. J., 295, 80-88, 1985.

O'Dea, C. P. "Constraints on the Properties of Bent Beams." NRAO Wksp. Proc., J9, 64-75, 1985.

O'Dea, C. P.; Dent, W. A.; and Balonek, T. J. "Broadband Spectral Evolution of Outbursts in Extragalactic Radio Sources." In: Active Galactic Nuclei. Ed. J. E. Dyson. (Manchester: Manchester University Press, 1985) 63-67.

O'Dea, C. P. and Owen, F. N. "The Global Properties of a Representative Sample of 51 Narrow-Angle-Tall Radio Sources in the Directions of Abell Clusters." Astron. J., 90, 954-972, 1985.

O'Dea, C. P. and Owen, F. "Polarization Structure of the Jets in NGC 1265." NRAO Wksp. Proc., 9^, 47-56, 1985.

O'Dea, C. P. and Owen, F. N. "VLA Observations of 57 Sources in Clusters of Galaxies." Astron. J., 90, 927-953, 1985.

Odenwald, S. F. and Shivanandan, K. "Star-Forming Regions near the Supernova Remnant IC 443." Astrophys. J., 292, 460-463, 1985.

Ondrechen, M. P. "Radio Continuum Observations of the Bar and Disk of M83." Astron. J., 90, 1474-1480, 1985.

Owen, F. N.; O'Dea, C. P.; Inoue, M.; and Eilek, J. A. "VLA Observations of the Multiple Jet Galaxy 3C 75." Astrophys. J., 294, L85-L88, 1985.

Padman, R.; Scott, P. F.; Vizard, D. R.; and Webster, A. S. "CS 5-4 Observations of 0MC1: Evidence for External Heating of the Quiescent Gas." Mon. Not. Roy. Astron. Soc, 214, 251-270, 1985.

42

Pallavicini, R.; Willson, R. F.; and Lang, K. R. "Microwave Observations of Late-Type Stars with the Very Large Array." Astron. Astrophys., 149, 95-101, 1985.

Parma, P.; Ekers, R. D.; and Fantl, R. "High Resolution Observations of Low Luminosity Radio Galaxies." Astron. Astrophys. Suppl. Ser., 59, 511-521, 1985.

Pearson, T. J.; Perley, R. A.; and Readhead, A. C. S. "Compact Radio Sources in the 3C Catalog." Astron. J., 90, 738-755, 1985.

Persi, P.; Ferrari-Toniolo, M.; Tapia, M.; Roth, M.; and Rodriguez, L. F. "Time-Variable, Excess Radio Emission from Cyg0B2 No. 5." Astron. Astrophys., 142, 263-267, 1985.

Pineault, S.; Pritchet, C. J.; Landecker, T. L.; Routledge, D.; and Vaneldik, J. F. "Optical and Radio Imaging of the Supernova Remnant VRO 42.05.01 (G166.0+4.3)." Astron. Astrophys., 151, 52-60, 1985.

Pravdo, S. H.; Rodriguez, L. F.; Curiel, S.; Canto, J.; Torrelies, J. M.; Becker, R. H.; and Selgren, K. "Detection of Radio Continuum Emission from Herbig-Haro Objects 1 and 2 and from Their Central Exciting Source." Astrophys. J., 293, L35-L38, 1985.

Reid, M. J. and Ho, P. T. P. "G34.3+0.2: A 'Cometary' H II Region." Astrophys. J., 288, L17-L19, 1985.

Reynolds, S. P. "The Crab's Twin: The Nature of the Remnant 0540-693, and Its Implications for the Study of Crablike Remnants." In: The Crab Nebula and Related Supernova Remnants. Ed. M. C. Kafatos and R. B. C. Henry. (Cambridge: Cambridge University Press, 1985) 173-178.

Reynolds, S. P. "An Evolutionary History for the Crablike, Pulsar-Powered Supernova Remnant 0540-69.3." Astrophys. J., 291, 152-155, 1985.

Reynolds, S. P. and Aller, H. D. "No Shell Around 3C 58." Astron. J., 90, 2312-2316, 1985.

Rickard, L. J and Blitz, L. "Carbon Monoxide Isotope Ratios in Galactic Centers and Disks." Astrophys. J., 292, L57-L60, 1985.

Rickard, L. J; Turner, B. E.; and Palmer, P. "More Extragalactic Carbon Monoxide." Astron. J., 90, 1175-1183, 1985.

43

Roberts, D. H.; Greenfield, P. E.; Hewitt, J. N.; Burke, B. F.; and Dupree, A. K. "The Multiple Images of the Quasar 0957+561." Astrophys. J., 293, 356-369, 1985.

Robson, E. I.; Gear, W. K.; Smith, M. G.; Ade, P. A. R.; and Nolt, I. G. "Millimetre Observations of Optically Selected Quasars." Mon. Not. Roy. Astron. Soc, 213, 355-364, 1985.

Rodriguez, L. F.; Garcia-Barreto, J. A.; Canto, J.; Moreno, M. A.; Torres-Peimbert, S.; Costero, R.; Serrano, A.; Moran, J. M.; and Garay, G. "Radio Observations of the Young Planetary Nebula NGC 6302." Mon. Not. Roy. Astron. Soc, 215, 353-368, 1985.

Roland, J.; Hanisch, R. J.; Veron, P.; and Fomalont, E. "WSRT and VLA Observations of Very Steep Spectrum Radio Galaxies in Clusters." Astron. Astrophys., 148, 323-334, 1985.

Rood, H. J. and Williams, B. A. "The Intergalactic HI Cloud in Leo: A Simple Modeling of the Spitzer-Baade Collision Event." Astrophys. J., 288, 535-550, 1985.

Rots, A. H. "Display of Three-Dimensional Data in Radio Astronomy." In: Data Analysis in Astronomy. Ed. V. Di Gesu et al. (New York: Plenum, 1985) 417-423.

Rudnick, L.; Jones, T. W.; Aller, H. D.; Aller, M. F.; Hodge, P. E.; Owen, F. N.; Fiedler, R. L.; Puschell, J. J.; and Bignell, R. C. "Broad-Band Polarization Observations of Active Compact Radio Sources." Astrophys. J. Suppl. Ser., 57, 693-709, 1985.

Salpeter, E. E. and Dickey, J. M. "H I Mapping of Galaxies in the Hercules Cluster." Astrophys. J., 292, 426-440, 1985.

Sanders, D. B. and Mirabel, I. F. "CO Detections and IRAS Observations of Bright Radio Spiral Galaxies at cz < 9000 Kilometers per Second." Astrophys. J., 298, L31-L35, 1985.

Sanders, D. B.; Scoville, N. Z.; and Solomon, P. M. "Giant Molecular Clouds in the Galaxy. II. Characteristics of Discrete Features." Astrophys. J., 289, 373-387, 1985.

Sandqvist, A.; Wootten, A.; and Loren, R. B. "Distribution of HCOf (J-3-2) in the Inner 5 pc of the Galaxy." Astron. Astrophys., 152, L25-L28, 1985.

44

Saslaw, W. C. "Thermodynamics and Galaxy Clustering: Relaxation of N-body Experiments." Astrophys. J., 297, 49-60, 1985.

Saslaw, W. C.; Narasimha, D.; and Chitre, S. M. "The Gravitational Lens as an Astronomical Diagnostic" Astrophys. J., 292, 348-356, 1985.

Schenewerk, M. S.; Jewell, P. R.; Snyder, L. E.; Buxton, L. W.; Campbell, E. J.; and Flygare, W. H. "A Search for the Interstellar HCN Dimer." Astrophys. J., 296, 218-221, 1985.

Schmahl, E. J.; Kundu, M. R.; and Dennis, B. R. "Microwave Imaging of a Solar Limb Flare: Comparison of Spectra and Spatial Geometry with Hard X-rays." Astrophys. J., 299, 1017-1026, 1985.

Schmitt, J. H. M. M. and Reid, M. J. "VLBI Observations of the Nucleus of M87 at Two Epochs." Astrophys. J., 289, 120-123, 1985.

Schneider, D. P.; Lawrence, C. R.; Schmidt, M.; Gunn, J. E.; Turner, E. L.; Burke, B. F.; and Dhawan, V. "Deep Optical and Radio Observations of the Gravitational Lens System 2016+112." Astrophys. J., 294, 66-69, 1985.

Schwartz, P. R. "Radio Observations of Bright Ionized Rims." Astrophys. J., 298, 292-295, 1985.

Schwartz, P. R.; Frerking, M. A.; and Smith, H. A. "Pedestal Features in Dark Clouds: A Search for Radio Emission." Astrophys. J., 295, 89-93, 1985.

Schwartz, P. R.; Thronson, H. A. Jr.; Odenwald, S. F.; Galccum, W.; Loewenstein, R. R.; and Wolf, G. "Active Star Formation in NGC 2264." Astrophys. J., 292, 231-237, 1985.

Seaqulst, E. R.; Bell, M. B.; and Bignell, R. C. "Radio Studies of the Ionized Gas in the Nucleus of M82." Astrophys. J., 294, 546-559, 1985.

Seriradakis, J. H.; Reich, W.; Sieber, W.; Ruhr, H.; and Schlickelser, R. "An Extended Extragalactic Radio Source Behind the Milky Way." Astron. Astrophys., 143, 478-480, 1985.

Shaver, P. A.; Pottasch, S. R.; Salter, C. J.; Patnaik, A. R.; van Gorkom, J. H.; and Hunt, G. C. "The Compact Radio Source Near G357.7-0.1." Astron. Astrophys., 147, L23-L24, 1985.

45

Shaver, P. A.; Salter, C. J.; Patnaik, A. R.; van Gorkom, J. H.; and Hunt, G. C. "Two Remarkable Bright Supernova Remnants." Nature, 313, 113-115, 1985.

Shevgaonkar, R. K. and Kundu, M. R. "Dual Frequency Observations of Solar Microwave Bursts Using the VLA.' Astrophys. J., 292, 733-751, 1985.

Simon, R. S.; Johnston, K. J.; and Spencer, J. H. "A 0"25 Jet in the Quasar 3C 446." Astrophys. J., 290, 66-74, 1985.

Simon, T.; Fekel, F. C. Jr.; and Gibson, D. M. "AY Ceti: A Flaring, Spotted Star with a Hot Companion." Astrophys. J., 295, 153-161, 1985.

Slmonetti, J. H.; Cordes, J. M.; and Heeschen, D. S. "Flicker of Extragalactic Radio Sources at Two Frequencies." Astrophys. J., 296, 46-59, 1985.

Skillman, E. D. "Spatial Variations in the Physical Conditions in the Giant Extragalactic H II Region NGC 5471." Astrophys. J., 290, 449-461, 1985.

Snell, R. L.; Bally, J.; Strom, S. E.; and Strom, K. M. "Radio and Optical Observations of the Jets from L1551 IRS 5." Astrophys. J., 290, 587-595, 1985.

Snyder, L. E.; Schenewerk, M. S.; and Hollls, J. M. "Observations of Several New Transitions of Interstellar HCO." Astrophys. J., 298, 360-368, 1985.

Spangler, S. R. and Sakural, T. "Limits on Thermal Plasma In the Lobes of the Radio Galaxies 3C 79 and 3C 379.1." Astrophys. J., 297, 84-89, 1985.

Sramek, R. A. "Radio Emission From a Type I Supernova." In: Supernovae as Distance Indicators. Ed. N. Bartel. (Berlin: Springer-Verlag, 1985) 62-64.

Stocke, J. T.; Bums, J. 0.; and Christiansen, W. A. "VLA Observations of Quasars with 'Dogleg' Radio Structure." Astrophys. J., 299, 799-813, 1985.

46

Stocke, J. T.; Liebert, J.; Schmidt, G. D.; Gioia, I. M.; Maccacaro, T.; Schild, R. E.; Maccagni, D.; and Arp, H. C. "Optical and Radio Properties of X-ray Selected BL Lacertae Objects." Astrophys. J., 298, 619-629, 1985.

Stokes, G. H.; Taylor, J. H.; and Dewey, R. J. "A New Binary Pulsar in a Highly Eccentric Orbit." Astrophys. J., 294, L21-L24, 1985.

Stokes, G. H.; Taylor, J. H.; Weisberg, J. M.; and Dewey, R. J. "A Survey for Short-Period Pulsars." Nature, 317, 787-788, 1985.

Takakura, T.; Kundu, M. R.; McConnell, D.; and Ohki, K. "Simultaneous Observations of Hard X-ray and Microwave Burst Sources in a Limb Flare." Astrophys. J., 298, 431-436, 1985.

Takalo, L. 0. and Nbusek, J. A. "E2000+223: A Newly Discovered Old Nova?" Publ. Astron. Soc. Pacific, 97, 570-574, 1985.

Taylor, A. R. and Seaqulst, E. R. "A Deep VLA Survey of a Galactic Field: A Search for Stellar Radio Emission." Astron. J., 90, 2049-2054, 1985.

Thronson, H. A. Jr.; Lada, C. J.; and Hewagama, T. "The W3 Molecular Cloud." Astrophys. J., 297, 662-676, 1985.

Tohline, J. E. "Star Formation: Phase Transition, Not Jeans Instability." Astrophys. J., 292, 181-187, 1985.

Torrelles, J. M.; Ho, P. T. P.; Rodriguez, L. F.; and Canto, J. "VLA Observations of Ammonia and Continuum in Regions with High-Velocity Gaseous Outflows." Astrophys. J., 288, 595-603, 1985.

Troland, T. H.; Crutcher, R. M.; and Heiles, C. "Molecules and Dust Towards Cassiopeia A." Astrophys, J., 298, 808-817, 1985.

Turner, B. E. "VLA Observations of OH in Galaxies. I. NGC 253 and Its Nuclear Plume." Astrophys. J., 299, 312-333, 1985.

Turner, B. E. and Steimle, T. C. "Interstellar MgO." Astrophys. J., 299, 956-966, 1985.

47

Turner, J. L. and Ho, P. T. P. "The 1 Parsec Radio Core and Possible Nuclear Ejection in NGC 253." Astrophys. J., 299, L77-L81, 1985.

Turner, K. C. and Terzian, Y. "Studies of Small Galactic Nebulae." Astron. J., 90, 59-64, 1985.

Tytler, D. and Browne, I. "3C 159: A Double Emission-Line Radio Galaxy." Astron. J., 90, 1676-1680, 1985.

Ulvestad, J. S. "The Radio Structure and Host Galaxy of 3C 459." Astrophys. J., 288, 514-520, 1985.

Unwin, S. C; Cohen, M. H.; Biretta, J. A.; Pearson, T. J.; Selelstad, G. A.; Walker, R. C; Simon, R. S.; and Linfield, R. P. "VLBI Monitoring of the Superluminal Quasar 3C 273, 1977-1982." Astrophys. J., 289, 109-119, 1985.

Uson, J. M. "The Microwave Background Radiation." In: Observational and Theoretical Aspects of Relativistic Astrophysics and Cosmology. Ed. J. L. Sanz and L. J. Goicoechea. (Singapore: World Scientific, 1985) 269-310.

Vallee, J. P. and Higgs, L. A. "Radio Observations of the H II Region SI21 and Its Surroundings." Astron. J., 90, 2061-2073, 1985.

Vallee, J. P. and Moffat, A. F. J. "Search for Radio-Continuum Emission from Galactic O-Type and Wolf-Rayet Stars Off the Plane." Astron. J., 90, 315-317, 1985.

van Breugel, W.; Filippenko, A. V.; Heckman, T.; and Miley, G. "Minkowski's Object: A Starburst Triggered by a Radio Jet." Astrophys. J., 293, 83-93, 1985.

van Breugel, W.; Miley, G.; Heckman, T.; Butcher, H.; and Bridle, A. "Optical Emission-Line Gas Associated with the Radio Source 3C 277.3." Astrophys. J., 290, 496-516, 1985.

Vanden Bout, P. A.; Mundy, L. G.; Davis, J. H.; Loren, R. B.; and Butner, H. "Calibration of Millimeter-Wavelength Spectral Lines - Effect of Harmonic Mixer Response." Astrophys. J., 295, 139-142, 1985.

48

van der Hulst, J. M. and Hummel, E. "The First Detection of a Radio Continuum Bridge Between Interacting Galaxies." Astron. Astrophys., 150, L7-L8, 1985.

van Gorkom, J. H.; Ekers, R. D.; Johnston, K.; Radhakrlshnan, V.; and Salter, C. J. "A Search for Compact Sources In Supernovae Remnants." In: Supernovae, Their Progenitors and Remnants. Ed. G. Srinivasan and V. Radhakrlshnan. (Bangalore: Indian Academy of Sciences, 1985) 93-96.

van Gorkom, J. and Kotanyi, C. "Neutral Hydrogen Observations at the VLA." In: ESO Workshop on the Virgo Cluster. Ed. O.-G. Richter and B. Binggeli. (Garching bei Munchen: European Southern Observatory, 1985) 61-66.

van Gorkom, J. H.; Schwarz, U. J.; and Bregman, J. D. "Recombination-Line Observations of the Galactic Center." IAU Symp., 106, 371-376, 1985.

van Moorsel, G. A. and Wells, D. C. "Analysis of High-Resolution Velocity Fields—NGC 6503." Astron. J., 90, 1038-1045, 1985.

Waak, J. A.; Spencer, J. H.; Johnston, K. J.; and Simon, R. S. "Superluminal Re supply of a Stationary Spot in 3C 395?" Astron. J., 90, 1989-1991, 1985.

Wadiak, E. J.; Wilson, T. L.; Rood, R. T.; and Johnston, K. J. "VLA Observations of Formaldehyde Emission from Rho Ophiuchi B." Astrophys. J., 295, 463-465, 1985.

Walsh, D.; Lebofsky, M. J.; Rleke, G. H.; Shone, D.; and Elston, R. "Infrared Study and Classification of Optically Faint Steep-Spectrum Radio Sources." Mon. Not. Roy. Astron. Soc, 212, 631-643, 1985.

Weiler, K. W. "Radio and X-ray Observations of Extragalactic Supernovae." In: Supernovae, Their Progenitors and Remnants. Ed. G. Srinivasan and V. Radhakrlshnan. (Bangalore: Indian Academy of Sciences, 1985) 23-45.

Weinreb, S. "Analog-Filter Digital-Correlator Hybrid Spectrometer." IEEE Trans. Instrum. Meas., IM-34, 670-675, 1985.

Weinreb, S. and Pospieszalski, M. "X-Band Noise Parameters of HEMT Devices at 300K and 12.5K." IEEE MTT-S Internat. Microwave Symp., 539-542, 1985.

49

Wells, D. C. "NRAO's Astronomical Image Processing System." In: Data Analysis in Astronomy. Ed. V. Di Gesu et al. (New York: Plenum Press, 1985) 195-209.

White, R. L. and Becker, R. H. "MWC 349: A Bipolar Nebula with a Very Hot Central Star." Astrophys. J., 297, 677-685, 1985.

Williams, B. A. "MKW 10: A Group of Galaxies with a Compact Core." Astrophys. J., 290, 462-476, 1985.

Willson, R. F. "VLA Observations of Solar Active Regions at Closely Spaced Frequencies: Evidence for Thermal Cyclotron Line Emission." Astrophys. J., 298, 911-917, 1985.

Wilson, A. S.; Baldwin, J. A.; and Ulvestad, J. S. "Kinematics and Ionization of Extended Ionized Gas in Active Galaxies. I. The X-ray Luminous Galaxies NGC 2110, NGC 5506 and MCG -5-23-16." Astrophys. J., 291, 627-654, 1985.

Wilson, A. S.; Samarasinha, N. H.; and Hogg, D. E. "Magnetic Fields in the 'Jet' of the Crab Nebula." Astrophys. J., 294, L121-L124, 1985.

Windhorst, R. A.; Miley, G. K.; Owen, F. N.; Kron, R. G.; and Koo, D. C. "Sub-Millijansky 1.4 GHz Source Counts and Multicolor Studies of Weak Radio Galaxy Populations." Astrophys. J., 289, 494-513, 1985.

Winnberg, A.; Baud, B.; Matthews, H. E.; Habing, H. J.; and Olnon, F. M. "OH/IR Stars Within 50 Parsecs of the Galactic Center." Astrophys. J., 291, L45-L50, 1985.

Woodward, C. E.; Heifer, H. L.; and Pipher, J. L. "VLA Continuum Observations of Compact H II Regions." Astron. Astrophys., 147, 84-88, 1985.

Wrobel, J. M.; Jones, D. L.; and Shaffer, D. B. "Parsec-Scale Radio Emission from the E/SO Galaxy NGC 3894." Astrophys. J., 289, 598-602, 1985.

Wynn-Williaras, C. G. and Becklin, E. E. "The Infrared and Radio Morphology of the 'Hot-Spot' Galaxy NGC 2903." Astrophys. J., 290, 108-115, 1985.

Wynn-Williams, C. G.; Becklin, E. E.; and Scoville, N. Z. "The 3 Kiloparsec Radio Disk and Halo of NGC 1068." Astrophys. J., 297, 607-610, 1985.

50

Zheng, X. W.; Ho, P. T. P.; Reid, M. J.; and Schneps, M. H. "Molecular Clouds Associated with Compact H II Regions. II. The Rapidly Rotating Condensation Associated with ONI." Astrophys. J., 293, 522-529, 1985.

Ziurys, L. M. and Turner, B. E. "Detection of Interstellar Rotationally Excited CH." Astrophys. J., 292, L25-L29, 1985.

Ziurys, L. M. and Turner, B. E. "Detection of Interstellar Rotationally-Excited CH." In: Molecular Astrophysics. Ed. G. H. F. Diercksen, W. F. Huebner, P. W. Langhoff. (Dordrecht: Reidel, 1985) 591-601.

51

Additions to the 1984 Bibliography

Archer, J.W. and Faber, M.T. "Low-Noise, Fixed Tuned, Broadband Mixer for 200-270 GHz." IEEE MTT-S Int. Microwave Symp. Digest, 557-559, 1984.

Green, D.A. and Gull, S.F. "Two New Young Galactic Supernova Remnants." Nature, 312, 527-529, 1984.

Rodriguez, L.F. and Garcia-Barreto, J.A. "On the Abundance of Atomic and Molecular Hydrogen in the Outer Parts of Young Planetary Nebulae." Rev. Mexicana Astron. Astrof., J9, 153-157, 1984.

Turner, B.E. "How Stars Form: A Synthesis of Modern Ideas." Vistas Astron., 27, 303-332, 1984.

Yin, Q.; Heeschen, D.S.; and Heidmann, J. "VLA Observations of Markarian 8 at 6 cm Wavelength." Scientia Sinica A, 7, 750-756, 1984.

52