Gamma-Ray Emission from Extragalactic Radio Sources: Egret Observations of Active Galactic Nuclei
The Energetic Gamma-Ray Experiment Telescope (EGRET) on the Compton Gamma-Ray Observatory is an imaging high-energy telescope with sensitivity from approximately 20 MeV to 30 GeV. EGRET has observed more than 129 sources during more than 4 years of operation. Among these sources, 51 have been identified with active galaxies. A common characteristic of the AGN sources is that they are all radio-loud, flat radio spectrum sources. Many of them are seen as superluminal radio sources as well. The gamma-ray emission characteristics of these sources are reviewed and some of the proposed emission models are discussed.
KeywordsRadio Source Accretion Disk Active Galactic Nucleus Active Galaxy Extragalactic Radio Source
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- Blandford, R. & Rees, M.J., 1978, in Pittsburgh Conference on Bl Lac Objects, ed. A.N. Wolfe (University of Pittsburgh Press), 328Google Scholar
- Mannheim, K., & Biermann, P.L., 1992, A&A, 53, L21Google Scholar
- Marscher, A.P., & Bloom, S.D., 1992, in Proc. of the CGRO Science Workshop, NASA Conf. Pub. 3137, 346Google Scholar
- Sikora, M., Begelman, M.C., & Rees, M.J. 1993, in Proceedings of the Compton Symposium, in pressGoogle Scholar
- Thompson, D.J., et al., 1995, The Second EGRET Catalog of High-Energy Gamma-Ray Sources, accepted for publication in ApJ Suppl.Google Scholar