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Searching for galactic sources in the Swift GRB catalog

  • J.C. Tello (a1), A.J. Castro-Tirado (a1), J. Gorosabel (a1) (a2) (a3), D. Pérez-Ramírez (a4), S. Guziy (a5), R. Sánchez (a1), M. Jelínek (a1), P. Veres (a6) (a7) and Z. Bagoly (a6)...

Abstract

Since the early 90s Gamma Ray Bursts have been accepted to be of extra-galactic origin thanks to the isotropic distribution observed by BATSE and the redshifts observed in some of their optical or infrared counterparts. Nevertheless, there have been a few cases that upon further examination have turned out to be of galactic origin. Several of these galactic sources have presented a Fast Rise, Exponential Decay structure which leads us to believe that there could be an underlying correlation. In this work we do several statistical analyses to determine the degree of contamination by galactic sources that certain subsample of known FREDs have. And find that certain subsamples have a most probable contamination between 27% and 34%.

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