Discrete gamma-ray sources, historic supernovae, and pulsars

An attempt is made to identify gamma-ray sources (E_gamma = 100 MeV) observed by the SAS-2 and COS B satellites with known supernova remnants. An analysis of the gamma-ray-source catalog shows that these objects are evidently connected with supernova remnants with spectral indices of alpha not greater than 0.3. Such remnants probably contain a pulsar with a relatively strong magnetic field. It is noted that the more than 150 gamma-ray sources in the Galaxy may significantly contribute to the diffuse gamma radiation of the galactic disk.