Ofek2006 至少1％的短暴是SGR

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astro-ph/0611860 [abs, ps, pdf, other] :

Title: SGRs in nearby galaxies: rate, luminosity function and fraction among short GRBs
Authors: Eran O. Ofek (Caltech)
Comments: 8 pages, ApJ, accepted

It was suggested that some of the short-duration Gamma-Ray Bursts (GRB) are giant flares of Soft Gamma-ray Repeaters (SGR) in nearby galaxies. To test this hypothesis, I have constructed a sample of 47 short GRBs, detected by the Inter-Planetary Network (IPN), for which the position is constrained by at least one annulus on the celestial sphere. For each burst, I have checked whether its IPN 3-sigma error region coincides with the apparent disk of one of 316 galaxies found within 20 Mpc. I find a single match of a GRB with M74, which could, however, be due to a chance coincidence. I estimate the IPN efficiency as a function of fluence and derive the galaxy sample completeness. I find that assuming there is a cut-off in the observed energy distribution of SGR flares at <10^47>