The duration properties of Swift Gamma-Ray Bursts

摘要：

We report the systematic analysis of the durations for Swift gamma-ray bursts (GRBs) and compare the results with those of pre-Swift data. We show that the durations of Swift bursts also have two log-normal distributions that are clearly divided at T90 =2s. Their intrinsic durations also show a bimodal distribution but shift systematically toward the smaller value compared with the observed one. This study confirms the spectra of short GRBs are in general harder than the long GRBs and shows that this trend becomes weak in the source frame.

关键词： gamma-rays:bursts gamma rays:theory

作者: Z.-B.Zhang C.-S.Choi

作者单位: International Center for Astrophysics,Korea Astronomy and Space Science Institute 36-1 Hwaam,Yusong, International Center for Astrophysics,Korea Astronomy and Space Science Institute 36-1 Hwaam,Yusong,

会议类型: 国际会议

会议名称: The 252th Symposium of the International Astronomical Union(国际天文学联合会第252届研讨会)

会议地点: 海南三亚

会议语种:英文

页码: 431-432

在线出版日期: 2008-04-06（万方平台首次上网日期，不代表论文的发表时间）