Gamma-Ray Emission in MeV--GeV Region from Cygnus X-3
Abstract
The analysis of the simultaneous X-ray and gamma-ray observations of Cygnus X-3 by the ESA satellite COS B indicates that there exists a negative correlation between intensities of 2-12 keV X-rays and 150-5000 MeV gamma rays of Cygnus X-3. A clear image of a gamma-ray source at the position of Cygnus X-3 is obtained from the spatial distribution of gamma-ray photons incident when Cygnus X-3 was in a low X-ray state between June 1977 and June 1980, and the correspondent gamma-ray flux of Cygnus X-3 is derived as F(E greater than 100 MeV) = (1.3 + or - 0.6) x 10 to the -6th per sq cm s.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- November 1989
- DOI:
- 10.1086/168018
- Bibcode:
- 1989ApJ...346..391L
- Keywords:
-
- Gamma Ray Spectra;
- Spaceborne Astronomy;
- X Ray Binaries;
- Background Radiation;
- Cos-B Satellite;
- Cygnus Constellation;
- Maximum Entropy Method;
- Spatial Distribution;
- Space Radiation;
- GAMMA RAYS: GENERAL;
- STARS: INDIVIDUAL CONSTELLATION NAME: CYGNUS X-3;
- X-RAYS: BINARIES