The COMPTEL data (∼0.7–30 MeV) were searched for emission from AGN. Four sources have been detected so far: the quasars 3C 273, 3C 279, PKS 0528+134, and the radio galaxy Centaurus A. 3C 273 and 3C 279 were detected in CGRO observation period 3 with quite different spectral shapes. There is also evidence for 3C 273 at a weak flux level in observation period 11. The quasar PKS 0528+134 was detected above 3 MeV as part of a search for AGN already observed by EGRET. Cen A was seen up to 3 MeV by combining data from different observation periods.
Space Science Center, Physics
AIP Conference Proceedings
Digital Object Identifier (DOI)
Search for gamma‐ray emission from AGN with COMPTEL Collmar, W. and Diehl, R. and Lichti, G. G. and Schönfelder, V. and Steinle, H. and Strong, A. W. and Bloemen, H. and den Herder, J. W. and Hermsen, W. and Swanenburg, B. N. and de Vries, C. and McConnell, M. and Ryan, J. and Stacy, G. and Bennett, K. and Williams, O. R. and Winkler, C., AIP Conference Proceedings, 280, 483-487 (1993), DOI:http://dx.doi.org/10.1063/1.44271
© 1993 American Institute of Physics