Second COS B catalog of high-energy gamma-ray sources

Abstract

A list of 25 high-energy (E > 100 MeV) gamma-ray sources detected by COS B is presented. Only four sources are identified with well-known objects. Of the remaining sources, 20 are at low galactic latitude, and they may represent a new galactic population. Their luminosity is estimated to be in the range (0.4-5) X 10 36 ergs s _1 . It is seen that several hundred such sources may exist in the Galaxy. Their nature is not understood.