New high energy gamma-ray sources observed by COS B

Results are reported for a search for gamma-ray sources based on data obtained by the COS B satellite. Ten previously unknown sources were discovered which appear to be galactic and which have typical gamma-ray luminosities of 10 to the 35th power erg/s above 100 MeV. The latitude distribution of the sources is taken as an immediate indication of their galactic nature, and it is noted that the sources contribute significantly to the overall gamma-ray luminosity of the Galaxy and even account for most of the emission in the anticenter region. The nature of the sources is considered, a search for possible X-ray counterparts is briefly discussed, and it is suggested that these gamma-ray sources have substantially higher luminosities above 100 MeV than in the energy band between 2 and 6 keV.