Compton Observatory Science Report #130 Thursday, July 29, 1993 Eric Chipman, Compton Observatory Science Support Center Questions or comments can be sent to the Compton SSC. Phone 301/286-7764, e-mail SPAN GROSSC::CHIPMAN, Internet chipman@grossc.gsfc.nasa.gov. Science operations are continuing. BATSE discovered a new X-Ray Pulsar, and a Target of Opportunity has been declared. There was a maneuver performed on Tuesday, July 27, 1993, to the attitude of period 230 (Target has been revised for the Target of Opportunity). The eigenaxis maneuver angle was 167.2 degrees, with maneuver times 1243Z to 1334Z. The HGA boom axis with respect to the equator after the maneuver was 80.77 degrees. The Z-axis target is the Vela Pulsar (and GRO J1008-57), and the OSSE X-axis targets are the Sun and QSO 0716+714. See notes below for timeline information. There was a maneuver performed on Friday, July 30, 1993, to correct the attitude of what is called period 230. The eigenaxis maneuver angle was 5.7 degrees, with maneuver times 1346Z to 1353Z. The HGA boom axis with respect to the equator is now 80.2 degrees. The Z-axis target is the Vela Pulsar (and GRO J1008+57), and the OSSE X-axis targets are the Sun and QSO 0716+714 BATSE ----- The following was reported in IAU Circular 5836 (1993 July 27): GRO J1008-57 M. T. Stollberg, M. H. Finger, R. B. Wilson, B. A. Harmon, B. C. Rubin, N. S. Zhang, and G. J. Fishman report for the Compton Gamma Ray Observatory BATSE team: "Hard x-ray pulsations in the energy range 20-120 keV are being detected from a previously uncat- alogued source in the Carina-Vela region. The source location, de- termined from the observed times of Earth occultation, is centered at R.A. = 10h08m, Decl. = -57.5 deg (equinox 2000.0). The estimat- ed 1-sigma errors are bounded by a box with the following corners: R.A. = 10h09m.5, Decl. = -57 24'; 10h03m.5, -56 24'; 10h07m.0, -57 30'; 10h12m.5, -58 42'. The pulse period on July 19 was 93.587 +/- 0.005 s, corrected to the solar system barycenter. The present outburst was first detected on July 14. The pulsed flux in the range 20-50 keV increased from a detection threshold of about 50 mCrab to about 1.1 Crab (pulsed) on July 18, and this flux has con- tinued to increase slightly since that time. The spectrum of the phase-averaged pulsed flux between E = 20 and 100 keV on July 23-24 has been fitted by an optically thin thermal bremsstrahlung model of the form A/E exp(-E/kT), with A = 0.21 +/- 0.02 photon cmE-2 sE-1 and kT = 18.9 +/- 0.9 keV." During viewing period 229a BATSE folded-on-board pulsar data will be collected for the Crab pulsar, Geminga, PSR 0611+22, PSR 0656+14, Her X-1, PSR 1839+56, and PSR 1919+21. As of July 24th, BATSE has detected 719 cosmic gamma-ray bursts out of a total of 2356 on-board triggers in 824 days of operation. There have been 663 triggers due to solar flares with emission above 60 keV. COMPTEL ------- The COMPTEL instrument continues to perform well. Observations are in progress of the newly-discovered hard x-ray pulsar in Vela. It has been relatively quiet at most COMPTEL sites, since the anticlimactic conclusion of the 80th Tour de France last weekend. EGRET ----- EGRET operations continue to be normal. One unusual type of instrument lock up did occur for approximately one hour. Analysis showed that two relative time sequences were triggered on orbital events at nearly the same time, and that one interfered with the other. Minor changes to the two sequences to minimize the chances of another occurrence are being considered. Three members of the EGRET Team are attending the Cosmic Ray Conference in Calgary, Canada, and they are presenting results on high latitude AGN's, the Galactic Center, and on the Ophiuchus cloud. In addition, an over-view of EGRET results is being given at a special GRO session. OSSE ---- OSSE operations are normal. Following the announcement of the discovery by BATSE of a new X-ray pulsar, GRO J1008-57, the OSSE team requested a Target of Opportunity pointing of GRO to permit OSSE to help localize the source and study its hard X-ray emission. Fortunately, such a pointing was possible with a simple swapping of pointings from the remainder of the Phase 2 viewing plan, along with a relatively small translation. Furthermore, the spacecraft was oriented such that the one dimension of source location that OSSE can provide was aligned with the direction for which BATSE's error box was largest. However, because we had to choose the new Z axis before BATSE's error box was finalized, the pulsar was about 4 degrees off the scan plane, reducing OSSE's response to about 2/3 of the on-axis response. On Friday, the Z-axis will be moved several degrees to place the pulsar on OSSE's scan plane. We have clearly detected the pulsar to energies >100 keV. By combining our mapping observations with those of BATSE, we are deriving a new estimate of the source location, which should be completed in a day or two. For Target of Opportunity viewing period 230, the Z-axis target is the X-ray pulsar GRO J1008-57; the X-axis targets are the Sun and QSO 0716+714. Because the Sun is one of the secondary targets, the slewing response to BATSE solar flare triggers is disabled. There have been no slews to the Sun since the last report. OSSE data from the activation period (final third, 91/127-136) have been reprocessed and will be delivered to the Compton GRO Science Support Center Archive today. A number of targets were viewed with limited livetime during that interval, including the Crab Nebula, A0535+26, and the Vela Pulsar. Other Items: ------------ Phase 2 Timeline: To observe the new X-ray pulsar, the modified plan for the next 3 periods is as follows: VIEW +Z-AXIS GRO Z-AXIS GALACTIC GRO X-AXIS OSSE PRIMARY TARGET OSSE SECONDARY TARGET PER. START TARGET RA DEC LONG LAT RA DEC TARGET RA DEC TARGET RA DEC 230 07/27/93 VELA REGION 143.03 -54.64 276.66 -2.27 127.10 34.31 BATSE PULSAR 145.00 -59.00 QSO 0716+714 230.5 07/30/93 VELA REGION 149.86 -53.17 278.79 1.44 131.53 35.41 BATSE PULSAR QSO 0716+714 231 08/03/93 NGC 6814 289.94 -15.33 22.22 -13.08 186.93 -39.38 NGC 6814 295.67 -10.31 NGC 4507 188.90 -39.91 229 08/10/93 GAL 5+05 264.60 -22.06 5.00 5.00 188.59 30.82 G CENTER 0+0 266.40 -28.94 COMA CLUSTER 194.90 27.96 Several people have requested that we keep the old period numbers for these pointings, so the numbers are out of order. Phase 3 Timeline: The following is the current preliminary Phase 3 Timeline as reviewed by the Timeline Committee. The reboost activities and the blend with the end of Phase 2 may impact this timeline, and there are still some constraint checks and other checks to be made. Therefore, this timeline should definitely NOT be considered final yet. In particular, the first few periods will probably not take place on the dates shown, or in this order. 14 July 1993 GRO PHASE 3 VIEWING PLAN VIEW +Z-AXIS GRO Z-AXIS GALACTIC GRO X-AXIS OSSE PRIMARY TARGET OSSE SECONDARY TARGET PER. START TARGET RA DEC LONG LAT RA DEC TARGET RA DEC TARGET RA DEC 301 09/07/93 VELA PULSAR 128.92 -45.18 263.59 -2.74 161.94 39.80 VELA PULSAR 128.92 -45.18 QSO 1028+313 157.74 31.05 302 09/14/93 N CYG 1992 307.63 52.63 89.13 7.82 208.84 6.66 N CYG 1992 307.63 52.63 PKS 1413+135 213.99 13.33 303 10/05/93 CEN A 201.37 -43.02 309.52 19.42 205.22 46.92 CEN A 201.37 -43.02 MRK 279 208.26 69.30 304 10/19/93 VIRGO 277+58 180.01 -1.62 277.60 58.70 270.91 -28.89 VIRGO 277+58 180.01 -1.62 G CENTER 0+0 266.40 -28.94 305 10/26/93 VIRGO 277+62 181.58 2.06 277.70 62.70 270.38 -30.16 VIRGO 277+62 181.58 2.06 G CENTER 0+0 266.40 -28.94 306 11/02/93 VIRGO 278+66 183.29 5.68 278.20 66.70 271.03 -21.61 VIRGO 278+66 183.29 5.68 PSR 1800-21 270.96 -21.61 307 11/09/93 VIRGO 280+70 181.19 9.53 268.69 69.24 252.79 -61.99 VIRGO 269+96 181.19 9.53 GPLANE 324 232.93 -56.20 308 11/16/93 VIRGO 283+74 187.61 12.59 283.22 74.65 258.54 -55.65 VIRGO 283+74 187.61 12.59 GPLANE 332 243.91 -50.82 309 11/23/93 VIRGO 283+74 187.69 12.41 283.70 74.50 272.61 -21.93 VIRGO 283+74 187.69 12.41 PSR 1800-21 270.96 -21.61 310 11/30/93 GEMINGA 98.48 17.77 195.14 4.27 201.46 35.02 GEMINGA 98.48 17.77 NGC 4151 182.63 39.41 311 12/14/93 VIRGO 283+74 187.69 12.41 283.70 74.50 272.61 -21.93 VIRGO 283+74 187.69 12.41 PSR 1800-21 270.96 -21.61 312 12/21/93 VIRGO 280+70 185.52 9.12 280.50 70.70 271.83 -21.80 VIRGO 280+70 185.52 9.12 PSR 1800-21 270.96 -21.61 313 12/28/93 VIRGO 289+78 190.10 16.12 289.30 78.70 270.42 -30.20 VIRGO 289+78 190.10 16.12 G CENTER 0+0 266.40 -28.94 314 01/04/94 PSR 1259-63 195.69 -63.83 304.18 -0.99 277.55 3.99 PSR 1259-63 195.69 -63.83 N HER 1991 281.63 12.24 315 01/18/94 PSR 1259-63 195.69 -63.83 304.18 -0.99 282.83 1.41 PSR 1259-63 195.69 -63.83 G CENTER 0+0 266.40 -28.94 316 01/25/94 NGC 1068 37.41 10.61 158.48 -45.38 306.06 7.18 3C 120 68.29 5.35 CTA 102 338.15 11.73 317 02/08/94 CEN A 201.37 -43.02 309.52 19.42 310.35 -19.21 CEN A 201.37 -43.02 CTA 102 338.15 11.73 318 02/15/94 GPLANE 15 268.94 -13.18 14.79 6.00 5.76 -26.89 GPLANE 15 274.47 -15.90 NGC 253 11.88 -25.29 319 02/22/94 QSO 0716+714 110.48 71.34 143.98 28.02 341.13 12.08 QSO 0716+714 110.48 71.34 PKS 2155-304 329.72 -30.22 320 03/08/94 NGC 7469 345.81 8.87 83.09 -45.47 76.45 4.13 NGC 7469 345.81 8.87 3C 120 68.29 5.35 321 03/15/94 NGC 3227 157.18 32.26 194.76 58.73 14.17 51.67 QSO 1028+313 157.74 31.05 MRK 3 93.91 71.03 322 03/29/94 1H 1822-371 276.44 -37.11 356.85 -11.29 349.25 21.35 1H 1822-371 276.44 -37.11 QSO 2251+158 343.49 16.13 323 04/19/94 GPLANE 15 270.89 -12.83 16.03 4.51 358.13 11.96 GPLANE 15 274.47 -15.90 NGC 7469 345.81 8.87 324 04/26/94 GP 147-09 49.07 46.94 147.04 -9.04 67.24 -41.60 GT 0236+610 40.14 61.22 SN 1987A 83.86 -69.27 325 05/10/94 NGC 3227 156.69 31.65 195.92 58.31 47.37 28.24 QSO 1028+313 157.74 31.05 NRAO 140 54.13 32.31 326 05/17/94 NGC 7469 345.81 8.87 83.09 -45.47 81.19 31.01 NGC 7469 345.81 8.87 NRAO 140 54.13 32.31 327 05/24/94 PSR 1951+32 298.76 28.07 64.87 -0.03 69.89 50.97 CYG X-3 308.11 40.96 PSR 0611+22 93.56 22.42 328 05/31/94 PSR J0437-47 69.26 -47.25 253.40 -42.00 88.04 41.18 PSR J0437-47 69.26 -47.25 CRAB PULSAR 83.52 22.02 329 06/07/94 GPLANE 18 275.93 -13.26 18.00 0.00 341.41 60.41 GPLANE 18 275.93 -13.26 GT 0236+610 40.14 61.22 330 06/14/94 PSR 1951+32 298.76 28.07 64.87 -0.03 69.89 50.97 CYG X-3 308.11 40.96 PSR 0611+22 93.56 22.42 331 06/21/94 GPLANE 18 275.93 -13.26 18.00 0.00 341.41 60.41 GPLANE 18 275.93 -13.26 GT 0236+610 40.14 61.22 332 07/05/94 PSR 1951+32 298.76 28.07 64.87 -0.03 69.89 50.97 CYG X-3 308.11 40.96 PSR 0611+22 93.56 22.42 333 07/12/94 GPLANE 5 273.86 -26.03 5.81 -4.30 238.09 58.96 GPLANE 15 274.47 -15.90 HER X-1 254.46 35.34 334 07/19/94 PSR J0437-47 69.26 -47.25 253.40 -42.00 107.01 36.16 PSR J0437-47 69.26 -47.25 GEMINGA 98.48 17.77 335 08/02/94 NGC 7469 345.81 8.87 83.09 -45.47 81.19 31.01 NGC 7469 345.81 8.87 NRAO 140 54.13 32.31 336 08/09/94 PKS 0528+134 87.70 0.98 205.00 -13.00 178.49 39.05 PSR 0656+14 104.70 14.23 NGC 4151 182.63 39.41 337 08/30/94 VELA PULSAR 128.92 -45.18 263.59 -2.74 200.60 17.34 VELA PULSAR 128.92 -45.18 3C 273 187.28 2.05 338 09/20/94 3C 317 234.71 -1.82 4.05 40.40 143.62 -30.89 PG 1416-129 214.77 -13.18 MCG -5-23-16 146.92 -30.96 10/04/94 End Plan The following is the list of selected investigations for Phase 3 of the Compton Observatory mission. We believe this is complete and accurate; this includes both Guest and Instrument Team investigations. Some investigations were selected with no funding. There are also Target of Opportunity selected investigations. Akerlof Carl Correlative Analysis of Energetic Gamma Ray Emission from the Crab Nebula and Geminga Aschwanden Markus Electron Beams in Solar Flares Backer Donald A Search for Pulsed Radio Emission from Unidentified EGRET Sources Bailes Matthew Gamma Ray Emission from the Nearby Millisecond Pulsar PSR J0437-4715 Baring Matthew Continuum Spectral Models of Gamma Ray Burst Sources Barthelmy Scott Distribution of GRB Coordinates in Real Time for Multiband Follow-up Observations Begelman Mitchell The Large Particle Monte Carlo Method: A Powerful New Tool for Simulating Gamma Ray Spectra from Compact Sources Bennett Kevin Study of Gamma Ray Pulsars with COMPTEL Bertsch David Use of EGRET High Energy Capability to Investigate Energetic Solar Flare Processes Bloemen Hans A COMPTEL-EGRET-OSSE Study of the Extended Source Near Longitude 18 deg. Boer Michel Search for Gamma Ray Burst Counterparts at the ESO Schmidt Telescope Cameron Robert Hard X-Ray Emission from Seyfert Galaxies Carraminana Alberto Search for New Gamma Ray Pulsars with COMPTEL Chen Wan Search for 1809 keV Emission of 26-A1 from Nearby Supernova Remnants Using COMPTEL Chipman Eric Search for High Energy Gamma Ray Bursts Using EGRET Coe Malcolm Correlative Studies of Hard X-Ray and Optical/IR Properties of Be X-Ray Binaries Coe Malcolm A Search for Gamma Ray Emission from the Enigmatic X-Ray Pulsar 1E229+586 Coe Malcolm The Strange Stellar System GT0236+61 (=LSI+61deg.303) in the Field of CG135+1 Coe Malcolm Correlated BATSE and Optical/IR Studies of A1118-61 Cordes James Multiwavelength Studies of Rotation-Driven Pulsars Dennis Brian Access to the BATSE Solar Flare Data for the Solar Physics Community Dermer Charles The Nature of the Variable Multiwavelength Continuum Radiation of Active Galactic Nuclei Diehl Roland 26-Al 1.809 MeV Gamma Ray Line Study of Nearby Regions Diehl Roland Study of Gamma Ray Line Emission from Diffuse Sources Dingus Brenda Analysis of Gamma Ray Bursts Detected by EGRET Durouchoux Philippe Search for Correlated Gamma-Ray/Radio Emission from the GRS 1758-258 Central Source, Jets and Hot Spots Durouchoux Philippe Search for Correlated Gamma Ray Radio Emission from the Central Source, Jets and Hot Spots of the 1E 1740-2942 Complex Edelson Rick BATSE Long-Term Monitoring of Active Galactic Nuclei Emslie A. Gordon A Search for Pre- and Post-Burst Emission from Gamma Ray Burst Sources Epstein Richard Gamma Ray Burst Spectral and Temporal Variability: A Search for Prevalent Properties Fenimore Edward Gamma Ray Burst Intensity Distributions Covering a Dynamic Range of 10 to the 3rd Fichtel Carl Investigation of High Energy Gamma Ray Emission from AGNs: A Deep Exposure at High Galactic Latitude Greiner Jochen Immediate Optical Follow-up Observations of Gamma Ray Burst Error Boxes Greiner Jochen Search for Time-Correlated Optical Counterparts of Gamma Ray Bursters Grove J. Eric OSSE Observations of Known Gamma Ray Pulsars Grunsfeld John Investigation of Accretion Powered Pulsars with BATSE Hakkila Jon Further Models of the Spatial and Luminosity Distribution of BATSE Gamma Ray Bursts Halpern Jules Multiwavelength Observations of Unidentified High-Energy Gamma-Ray Sources Hanlon Lorraine Study of Spectral Shape and Evolution in Gamma Ray Bursts Harding Alice Study of Gamma Ray Emission from Three Crab-like Supernova Remnants Harding Alice Cyclotron Line Diagnostics of Gamma Ray Burst Emission Models Harmon B. Alan Detection and Monitoring of Hard X-Ray/Gamma Ray Sources with the BATSE Earth Occultation Technique Hartman Robert Understanding Blazar Emissions Haskins Penelope Near-Field Imaging for Discrimination of Locally-Produced Gamma Ray Background on the COMPTEL Hermsen Willem A COMPTEL Study of Confused Regions with Unidentified Sources Higdon James Determination of Stellar Sources of 26-A1 from COMPTEL Measurements Hunter Stanley Gamma Ray Emission from the Orion/Monoceros Molecular Cloud Complex Hurley Kevin Maintaining the Third Interplanetary Network for Gamma Ray Bursters Johnson W. Neil OSSE Observations of Blazars Jung Gregory OSSE Observations of the Galactic Center Region Kanbach Gottfried Identification of Selected Galactic Gamma Ray Sources Kaper Lex Simultaneous IUE and BATSE Observations of Vela X-1 Kieda David Constraints on Gamma Ray Burster (GRB) Source Distances Using GRO/BATSE Data in Coincidence with Ground Based UHE Gamma Ray Detectors Kinzer Robert Multi-Wavelength Observations of Centaurus A Kniffen Donald Investigation of the High Latitude Diffuse Gamma Ray Emission Kouveliotou Chryssa Study of the Temporal and Spectral Variability of Black-hole Candidates with BATSE Kroeger Richard GRO Observations of Bright Gamma Ray Transients Kundu Mukul Millimeter Imaging of Energetic Electrons in Solar Flares in Conjunction with GRO Experiments in Hard X-Rays and Gamma Rays Kunz Mathias Observation of Cyclotron Resonance Features in the High-On Spectrum of Her X-1 with OSSE Kurfess James Initial OSSE Sky Survey Observations: Deep Survey in the Virgo Region Lamb Donald Analysis of Clustering and Structure in the Angular Distribution of Gamma Ray Bursts Lamb Donald Analysis and Modeling of Cyclotron Lines in the Spectra of Gamma Ray Bursts Lamb Richard Observations of Nearby EGRET AGN's Laros John Maintaining the Third Interplanetary Network Leising Mark OSSE and COMPTEL Observations of Nearby Type-I Supernovae Leising Mark OSSE Spectral, Timing, and Monitoring Observations of Cygnus X-1 Leventhal Marvin Search for Galactic Gamma Ray Line Emission Using BATSE Liang Edison Modeling BATSE Gamma Ray Burst Continuum Spectra and Spectral Evolution Liang Edison Gamma Rays from Galactic Black Holes Lin Robert Electron Acceleration in Solar Flares Ling James Enhanced BATSE Earth Occultation Analysis for Monitoring Black Holes and AGN Lingenfelter Richard Analysis of 2.223 MeV Gamma Ray Line Emission from Solar Flares Lingenfelter Richard Search for Repeating Sources of Classical Gamma Ray Bursts Machado Marcos An Investigation into the Fundamental Time Structures of High-Energy Processes in Solar Flares Macomb Daryl Long-Term Monitoring of the Transient, Hard X-ray Source Sct X-1 Mahoney William Search for Weak and Long Duration Gamma Ray Bursts Maisack Michael An OSSE Observation of NGC 4151 Maisack Michael A Broad-Band Observation of the QSO NRAO 140 Malkan Matthew Detecting New Extragalactic High-Energy Gamma Ray Sources: Nature of the 100 MeV Emission from Blazars Mattox John Completion of the EGRET Full-sky Survey Matz Steven OSSE Observation and Monitoring of Cygnus X-3 Mayer-Hasselwander Fluctuation Analysis of EGRET Observations of the Whole Hans Sky: Log N-Log S of Galactic & Extragalactic Sources & the Source Contribution to the Total Emission McBreen Brian Gamma Ray Observations of BL Lac Objects McCollum Bruce The Unique Be Star - Radio Pulsar SS 2883 at Periastron Encounter McConnell Mark COMPTEL Observations of X-Ray Binaries McConnell Mark Investigation of BATSE Sensitivity to Polarized Gamma-Radiation McGlynn Thomas Compton Observatory Observations of Clusters of Galaxies: Part II McHardy Ian Long Timescale Variability of AGN with BATSE McNamara Bernard A Long Term Monitoring Program of Sco X-1 Using BATSE Meszaros Peter Cosmological Gamma Ray Burst Models: Signatures and Constraints Mushotzky Richard Thermal or Non-Thermal? Testing the Fundamental Nature of Radio-Quiet AGN Nemiroff Robert Continuing the Search for Gravitational Lensing Echoes in BATSE Data Nemiroff Robert What is GRO J0752+17? Norris Jay Measurement of Apparent Time Dilation in Cosmic Gamma Ray Bursts Norton Andrew OSSE Observations of Intermediate Polars O'Neill Terrence COMPTEL Study of Neutrons and Gamma Rays from Solar Flares Paciesas William Time-Resolved Spectroscopy of Gamma Ray Bursts Paczynski Bohdan Features in the Spectra of Gamma Ray Bursts Parsons Ann Continuous Monitoring of the Hard X-ray Spectrum and Flux of NGC 4151 Petre Robert Multi-Wavelength Tests of the Origin of the Continuum Emission in AGN Pinto Philip Multiwavelength Spectral Synthesis Models of Supernovae Porter Alain Seyfert I Galaxies Detected by EUVE and the ROSAT WFC Prince Thomas Studies of Accreting Binary Pulsars and Isolated Pulsars with BATSE Purcell William OSSE Observations of Diffuse Galactic Gamma Ray Emission Ramaty Reuven Pion and Nuclear Line Emission from the June 1991 Solar Flares Reichert Gail Multi-Waveband Variability Constraints on the Central Engine in NGC 4151 Romani Roger Pulsar Gamma Ray Production Ryan James Determining the Characteristics of Solar Microflares with BATSE Ryan James A Rapid Response Gamma Ray Burst Detection Network Based on COMPTEL Localizations Schachter Jonathan Evolutionary Properties of EGRET AGN Based on Complete Radio Samples Schaefer Bradley Deep Searches for Counterparts of Gamma Ray Bursts Schaefer Bradley Burst Spectroscopy from 2 keV to 200 MeV Schlegel Eric Gamma Ray Emission from Intermediate Polars Schlickeiser Reinhard Broadband Emission from Extragalactic Gamma Ray Sources Schonfelder Volker Study of Gamma Ray Emission from AGNs with COMPTEL Schwartz Richard Studying the Thermal/Non-Thermal Crossover in Solar Flares Share Gerald Measurements of Solar Flares with OSSE and COMPTEL Shrader Chris Blazar AGN as Targets of Opportunity Shrader Chris Multiwavelength Study of X-Ray Novae Starrfield Sumner Compton Observatory Observations of Nova Her 1991 and Nova Cyg 1992 Staubert Rudiger OSSE Observations of GX 1+4: Clues on the Suspected Very High Magnetic Field Strength Staubert Rudiger OSSE Observation of the Flat X-Ray Spectrum Quasar PG 1416-129 Strong Andrew Study of Diffuse Galactic Continuum Emission with COMPTEL Sun Xuejun Multi-band Study of the Newly Discovered Gamma Ray Source 20.2+0.7 Szabelski Jacek Cosmic Ray Intensity Variation in the Galaxy from Studies of Relative Contribution of Electrons and Protons to Gamma Ray Emissivity Tavani Marco High-Energy Emission from the Gamma Ray/Radio-star 2CG 135+1/LSI 61 303 Tavani Marco Shock High Energy Emission from the Be-star/Pulsar System PSR 1259-63 Taylor Joseph Studies of High-Energy Pulsars with EGRET Thompson David Studies of High Energy Pulsars with EGRET Truran James Gamma Rays from Classical Novae Tueller Jack Cyclotron Line Emission from Her X-1 and the BATSE Detection Capability Ulmer Melville CGRO/OSSE Proposal to Observe PSR B0540-69, PSR B1509-58 and Search for Pulsed Emission from SN1987a van Paradijs Jan Search for Soft Gamma Ray Events (25-55 keV) in the BATSE Database van der Klis Michiel Pulse Timing of Cen X-3 van der Klis Michiel Joint BATSE/Radio Observations of Black Hole Candidates van der Klis Michiel Pulse Timing of Vela X-1 Vestrand W. Thomas Continued Observations of Probable Gamma Ray Blazars: An Investigation of Quiescent and Flaring Properties Vestrand W. Thomas Gamma Ray Polarization Studies with COMPTEL Vilmer Nicole Acceleration and Transport of Solar Flare Associated Particles Through a Joint Study of the Nancay Radioheliograph and GRO Observations Weekes Trevor Study of MeV/GeV Sources in the 100-1000 GeV Energy Range Wehrse Rainer Interaction of Gamma Rays with Accretion Disks in AGNs Wheaton William Initial OSSE Sky Survey Observations: Deep Survey in the Virgo Region Wheaton William OSSE Observations of Diffuse Galactic Gamma Ray Emission White Richard Search for High Energy Gamma Ray Emission from Cygnus OB2 Association Using EGRET Wilson Robert Studies of Accreting Binary Pulsars and Isolated Pulsars with BATSE Winkler Christoph Gamma Ray Burst Spectroscopy with COMPTEL Zarro Dominic Testing Solar Flare Models with BATSE Zych Allen Observations of the Starburst Galaxies NGC 253 and M82 with OSSE Zych Allen Search for 10-30 MeV Emission from EGRET AGN Sources with COMPTEL