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Code 662, NASA Goddard Space Flight Center, Greenbelt, MD 20771 USA

W.W. Hansen Experimental Physics Laboratory and Department of Physics, Stanford University, Stanford CA 94305 USA

Max-Planck-Institut für Extraterrestrische Physik, Giessenbachstr D-85748 Garching FRG

Department of Physics, Hampden-Sydney College, Hampden-Sydney, VA 23943 USA

Grumman Aerospace Corporation, Bethpage, NY 11714 USA

1e-mail:djt@egret.gsfc.nasa.gov 2USRA Research Associate 3Hughes STX 4Compton Observatory Science Support Center, operated by USRA. Present address: Astronomy Department, University of Maryland, College Park, MD 5NAS-NRC Research Associate 6NAS-NRC Senior Research Associate

Abstract:

The second catalog of high-energy gamma-ray observations from the Energetic Gamma Ray Experiment Telescope (EGRET) on the Compton Gamma Ray Observatory includes data from Phase 1 (1991 April - 1992 November) and Phase 2 (1992 November - 1993 September) of the mission. In addition to including more data than the first EGRET catalog ([Fichtel et al. 1994b]), this catalog uses an improved model of the diffuse galactic gamma radiation. The 129 sources in the catalog include one solar flare bright enough to be detected as a source, the Large Magellanic Cloud, five pulsars, 40 high-confidence identifications of active galactic nuclei, 11 AGN identifications with lower confidence, and 71 sources not yet identified with known objects. Also included are approximate upper limits for gamma-ray sources at any point in the sky and information about sources listed in the first EGRET catalog but not appearing in this one.

gamma rays: general





Sergej A.Trushkin
Sun Dec 8 10:02:02 MSK 1996