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Hard X-ray afterglows of short GRBs | | Davide Lazzati
; Enrico Ramirez-Ruiz
; Gabriele Ghisellini
; | | Date: |
1 Feb 2002 | | Journal: | AIP Conf.Proc. 662 (2003) 169-171 | | Subject: | astro-ph | | Affiliation: | IoA), Enrico Ramirez-Ruiz (IoA), Gabriele Ghisellini (OAB | | Abstract: | We report the discovery of a transient and fading hard X-ray emission in the BATSE lightcurves of a sample of short gamma-ray bursts. We have summed each of the four channel BATSE light curves of 76 short bursts to uncover the average overall temporal and spectral evolution of a possible transient signal following the prompt flux. We found an excess emission peaking ~30 s after the prompt one, detectable for ~100 s. The soft power-law spectrum and the time-evolution of this transient signal suggest that it is produced by the deceleration of a relativistic expanding source, as predicted by the afterglow model. | | Source: | arXiv, astro-ph/0202033 | | Services: | Forum | Review | PDF | Favorites | |
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