1996/12/10 by Martin Pohl, Pohl, Martin
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9612094
4 pages, Proceedings of Heidelberg workshop on gamma-ray emitting AGN
arxiv created 1996/12/10 · arxiv updated 2009/12/01
In this paper I investigate the γ-ray spectra of AGN by summing up the intensity and the power-law fit statistic of Quasars and OVV's and BL Lac's separately. The spectrum of the average AGN is softer than that of the extragalactic γ-ray background. It may be that BL Lac's, of which the average has a harder spectrum than Quasars, make up the bulk of the extragalactic background. We also find cut-offs both at low and at high energies in the spectra of Quasars and OVV's, however only at the time of γ-ray outbursts. While the cut-off at high energies may have something to do with opacity, the cut-off at low energies may be taken as indication that the γ-ray emission of Quasars is not a one component spectrum.