Gamma-ray sources observed by COS-B

Astronomy and Astrophysics – Astronomy

Scientific paper

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Cos-B Satellite, Gamma Ray Astronomy, Molecular Clouds, Pulsars, Spaceborne Astronomy, Astronomical Catalogs, Cross Correlation, Energetic Particles, Light Curve

Scientific paper

A status report is presented on the experimental study of the fine-scale structure measured by COS-B in the energy range 50 MeV - 5 GeV. All identified gamma-ray sources are discussed: (1) the temporal and spectral characteristics of the radio pulsars PSR 053+21 and PSR 0833-45; (2) COS-B upper limits on the gamma-ray flux from the binary system Cyg X-3; (3)the ρ Oph molecular cloud now shown to be resolved in gamma rays as is the case for the Orion complex; (4) the evidence on the detection of 3C273 in three COS-B observations. The 2CG catalogue of high-energy (point-like) gamma-ray sources contains 25 sources, of which 21 are not yet unambiguously identified. Their average properties are discussed.

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