Astronomy and Astrophysics – Astrophysics
Scientific paper
1998-10-14
Astropart.Phys. 11 (1999) 451-455
Astronomy and Astrophysics
Astrophysics
Accepted version by Astroparticle Physics, after some revisions
Scientific paper
10.1016/S0927-6505(99)00069-9
We argue that gamma-ray bursts (GRBs) may be the origin of the cosmic gamma-ray background radiation observed in GeV range. It has theoretically been discussed that protons may carry a much larger amount of energy than electrons in GRBs, and this large energy can be radiated in TeV range by synchrotron radiation of ultra-high-energy protons (\sim 10^{20} eV). The possible detection of GRBs above 10 TeV suggested by the Tibet and HEGRA groups also supports this idea. If this is the case, most of TeV gamma-rays from GRBs are absorbed in intergalactic fields and eventually form GeV gamma-ray background, whose flux is in good agreement with the recent observation.
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