Clusters of cosmic gamma-ray bursts as a manifestation of the local sources

Physics

Scientific paper

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Gamma-Ray Sources, Gamma-Ray Bursts, Mathematical Procedures And Computer Techniques, Solar Physics

Scientific paper

We have searched clusters of cosmic gamma-ray bursts (GRBs) in the 2B(3B) catalog and in pre-BATSE information. Our search is based on a selection of events coinciding in space and time. A study of the clusters found this way, shows that their angular size is ~30° and their time of activity (lifetime) is about 6 months. The best interpretation of these results is that GRB sources are of a local (heliospheric) origin. The main characteristics of some clusters (sources) are collected in a table, which can serve as a basis for creating a catalog of GRB sources. The heliospheric model of GRBs (3) predicts, that the local sources should exist a limited time because of their movement away from the Sun. In this case reduction in time of the GRB fluence from a given source should be observed. Signatures of intensity reduction from a source have in fact been observed. These effects in the framework of the heliospheric model enable us to estimate the burst energies and the distance to the burster sources.

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