Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993adspr..13..637f&link_type=abstract
Advances in Space Research (ISSN 0273-1177), vol. 13, no. 12, p. (12)637-(12)646
Astronomy and Astrophysics
Astronomy
2
Active Galactic Nuclei, Bl Lacertae Objects, Gamma Ray Astronomy, Gamma Ray Telescopes, Magellanic Clouds, Milky Way Galaxy, Pulsars, Quasars, Satellite-Borne Instruments, Solar Flares, Astronomical Models, Energy Spectra, Gamma Ray Observatory, Phase Diagrams, Sky Surveys (Astronomy)
Scientific paper
The Energetic Gamma-Ray Experiment Telescope (EGRET) on the Compton Gamma Ray Observatory (CGRO) covers the high energy gamma ray energy range, approximately 30 MeV to 30 GeV, with a sensitivity considerably greater than earlier high energy gamma-ray satellites. Thus far, 4 pulsars have been detected and their properties measured, including in 3 cases the energy spectrum as a function of phase. The details of the galactic plane are being mapped and a spectra of the center region has been obtained in good agreement with that expected from cosmic ray interactions. The Magellanic clouds have been examined with the Large Magellanic Cloud (LMC) having been detected at a level consistent with it having a cosmic ray density compatible with quasi-stable equilibrium. Sixteen Active Galactic Nuclei (AGN's) have been seen thus far with a high degree of certainty including 12 quasars and 4 BL Lac objects, but no Seyferts. Time variation has been detected in some of these AGN's
Bertsch David L.
Dingus Brenda
Fichtel Carl E.
Hartman Robert C.
Hunter Stan D.
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