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Donaghy, T. Q; Ricker, G. R; Braga, J; Manchanda, R; Butler, N; Yoshida, A; Fenimore, E. E; Prigozhin, G; Levine, A; Suzuki, M; Tamagawa, T; Graziani, C; Boer, M; Takagishi, K; Vanderspek, R; Galassi, M; Sakamoto, T; Lamb, D. Q; Olive, J.-F; Martel, F; Crew, G. B; Shirasaki, Y; Jernigan, J. G; Doty, J; Woosley, S. E; Hurley, K; Atteia, J.-L; Villasenor, J. S; Yamauchi, M; Pizzichini, G; Nakagawa, Y; Matsuoka, M; Kawai, N
Nature, 10/2005, Letnik: 437, Številka: 7060Journal Article
Gamma-ray bursts (GRBs) 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 the 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; this in turn led to the identification of the host galaxy of the burst as a late-type galaxy at z = 0.16 (ref. 10). These results show that at least some short-hard bursts occur at cosmological distances in the outskirts of galaxies, and are likely to be caused by the merging of compact binaries.
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