Hard X-ray afterglows of short GRBs

被引:0
作者
Lazzati, D [1 ]
Ramirez-Ruiz, E [1 ]
Ghisellini, G [1 ]
机构
[1] Inst Astron, Cambridge CB3 0HA, England
来源
GAMMA-RAY BURST AND AFTERGLOW ASTRONOMY 2001 | 2003年 / 662卷
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中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
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 similar to30 s after the prompt one, detectable for approximate to 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.
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页码:169 / 171
页数:3
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