报告题目：Classification of gamma-ray bursts based on the Amati relation
报 告 人：覃一平 教授(广州大学)
摘 要：Gamma-ray bursts (GRBs) are conventionally divided into two groups according to their durations. This classification scheme is not satisfied due to the fact that duration distributions of the two classes are heavily overlapped. We collect a new sample of GRBs and investigate the distribution of the deviation of the E_p value from the Amati relation. The distribution possesses an obvious bimodality structure and it can be accounted for by the combination of two Gaussian curves. Based on this analysis, we propose to statistically classify GRBs in the well-known E_p vs. E_iso plane with the deviation of the E_p value. This classification scheme divides GRBs into two groups: Amati type bursts and non-Amati type bursts. While the former type bursts well follow the Amati relation, the latter type bursts do not. It shows that most Amati type bursts are long duration bursts and the majority of non-Amati type bursts are short duration bursts.
时 间：2012年12月21日（星期五）上午10:00
地 点：苏富特 一楼 会议室
欢迎参加！
南京大学天文与空间科学学院
