Evidence of a long-duration component in the prompt emission of short gamma-ray bursts detected with BeppoSAX

被引：19
|
作者：
Montanari, E
Frontera, F
Guidorzi, C
Rapisarda, M
机构：
[1] Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy
[2] ISA Venturi, I-41100 Modena, Italy
[3] CNR, Ist Astrofis Spaziale & Fis Cosm, I-40129 Bologna, Italy
[4] ENEA, Div Fus, Ctr Ric Frascati, I-00044 Rome, Italy
来源：
ASTROPHYSICAL JOURNAL | 2005年 / 625卷 / 01期
关键词：
gamma rays : bursts; methods : statistical;
D O I：
10.1086/430759
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A statistical study on the light curves of all the short gamma-ray bursts (GRBs) detected with the Gamma Ray Burst Monitor (GRBM) aboard BeppoSAX is reported. Evidence of a very weak and long-duration component associated with these events in the two 1 s ratemeters of the GRBM (40 - 700 and < 100 keV) is found. It starts a few tens of seconds before the burst and continues for about 30 s after the burst. The overall hardness of this component is comparable to that of the event itself. The detection of a signal before the onset time and the hardness are consistent with an interpretation of the long-duration component in terms of prompt emission associated with short GRBs.
引用
收藏
页码：L17 / L21
页数：5
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