Discovery of the Short Gamma Ray Burst GRB 050709

Details Discovery of the Short Gamma Ray Burst GRB 050709 Discovery of the Short Gamma Ray Burst GRB 050709

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...207.1904v&link_type=abstract

American Astronomical Society Meeting 207, #19.04; Bulletin of the American Astronomical Society, Vol. 37, p.1187

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Gamma-Ray Bursts fall into two classes: short-hard and long-soft bursts. The latter are now known to have X-ray and optical afterglows, to occur at cosmological distances in star-forming galaxies, and to be associated with the explosion of massive stars. In contrast, the distance scale, the energy scale, and the progenitors of short bursts have remained a mystery. Here we report the discovery of a short-hard burst whose accurate localization has led to follow-up observations that have identified the X-ray afterglow and (for the first time) the optical afterglow of a short-hard burst. These, in turn, have led to identification of the host galaxy of the burst as a late-type galaxy at z = 0.16, showing that at least some short-hard bursts occur at cosmological distances in the outskirts of galaxies, and are likely to be due to the merging of compact binaries.

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