论文标题
第三Swift/BAT GRB目录中前体，主要峰和延长排放的时间特性
Temporal Properties of Precursors, Main peaks and Extended Emissions of Short GRBs in the Third Swift/BAT GRB Catalog
论文作者
论文摘要
从2004年12月至2019年7月的第三次Swift/BAT GRB目录中进行了一项全面的研究。我们详细介绍了迅速伽马射线发射阶段中三个组件的时间特性，包括前体，主峰和扩展发射（EE）。我们研究了一个组分和两个组分SGRB之间主要峰的相似性。发现它们的主要峰之间没有实质性的差异。重要的是，在单峰SGRB和双峰SGRB中进行了比较。发现我们在迅速/蝙蝠SGRB中的主要峰的结果与CGRO/BATSE中的峰值基本一致。我们进一步检查主要峰与前体或EES的相关性。我们发现，主要峰往往比前体更长，但比EES短。特别是，我们验证与三个组件的峰值通量相关的幂律相关性，强烈表明它们是由类似的中央发动机活动产生的。特别是，我们将GRB 170817A的时间特性与EE的其他SGRB进行了比较，并且没有发现它们之间的明显差异。
A comprehensive study is given to short gamma-ray bursts (sGRBs) in the third Swift/BAT GRB Catalog from December 2004 to July 2019. We examine in details the temporal properties of the three components in the prompt gamma-ray emission phase, including precursors, main peaks and extended emissions (EE). We investigate the similarity of the main peaks between one-component and two-component sGRBs. It is found that there is no substantial difference among their main peaks. Importantly, comparisons are made between in the single-peaked sGRBs and the double-peaked sGRBs. It is found that our results of main peaks in Swift/BAT sGRBs are essentially consistent with those in CGRO/BATSE ones recently found in our paper I. Interestingly, we suspect, besides the newly-found MODE I/II evolution forms of pulses in BATSE sGRBs in paper I, that there would have more evolution modes of pulses across differently adjacent energy channels in view of the Swift/BAT observations. We further inspect the correlation of the main peaks with either the precursors or the EEs. We find that the main peaks tend to last longer than the precursors but shorter than the EEs. In particular, we verify the power-law correlations related with peak fluxes of the three components, strongly suggesting that they are produced from the similar central engine activities. Especially, we compare the temporal properties of GRB 170817A with other sGRBs with EE and find no obvious differences between them.
