Title

Limits on MeV gamma-ray emission from active galaxies and other unidentified high-latitude gamma-ray sources observed with COMPTEL

Document Type

Conference Proceeding

Publication Date

1-1-2007

Abstract

We have established cumulative flux limits in the COMPTEL energy range (0.8-30 MeV) for a large sample of active galactic nuclei (AGN) of general interest. Our target list consists of both known and unidentified gamma-ray sources at high Galactic latitudes (|b|>10°). Limits to the timeaveraged MeV-emission measured with COMPTEL are derived from all-sky maximum-likelihood significance and flux maps produced using the full COMPTEL dataset spanning the entire nine-year period of the CGRO mission (April 1991-June 2000). The flux limits described here will be used to assess the contribution of AGN to the diffuse gamma-ray background measured in the MeV regime, and may serve to constrain the emission processes operative in high-energy cosmic sources. These results will also complement those anticipated from the high-energy GLAST mission scheduled forlaunch later this year.

Publication Source (Journal or Book title)

Proceedings of the 30th International Cosmic Ray Conference, ICRC 2007

First Page

1085

Last Page

1088

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