Astronomy and Astrophysics – Astronomy
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.4105o&link_type=abstract
American Astronomical Society Meeting 210, #41.05; Bulletin of the American Astronomical Society, Vol. 39, p.155
Astronomy and Astrophysics
Astronomy
Scientific paper
I present our efforts to search for Soft Gamma-ray Repeaters (SGRs) in nearby galaxies. Our candidates are chosen by cross-correlating the error regions of short duration Gamma-Ray Bursts (GRBs) detected by the Inter-Planetary Network (IPN) with the position of nearby galaxies. We used the results to constrain the rate, luminosity function and fraction of extragalactic SGR flares among short duration GRBs. We have found that the fraction of SGRs among short GRBs is <16% (95% confidence), and is most probably larger than 1%. We also find that the rate of SGR giant flares with energy larger or comparable to the energy of the 2004 December 27 giant flare is (0.4-5)x10-4 yr-1 per SGR, and that there is a steepening of the flare energy distribution at <3x1046 erg (95% confidence).
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