论文标题
{\ em fermi}/gbm观察到的延长发射的短GRB中迅速发射的属性
The properties of prompt emission in short GRBs with extended emission observed by {\em Fermi}/GBM
论文作者
论文摘要
具有延长发射（EE）的短GRB最初由短钉钉组成，其次是持久的EE，被认为被归类为短GRB的小节。 {\ em swift}时代可用的狭窄能带结合了缺乏光谱信息，从而阻止了这些事件的内在特性。在本文中，我们使用所有可用的{\ em fermi}/gbm数据对用EE进行了系统搜索。搜索确定了26个GBM检测的短GRB，其EE与{\ em swift}/bat观察到的GRB 060614相似。我们专注于研究所有26个GRB的硬尖峰和EE组件的光谱和时间特性，并探索它们之间的差异和可能的相关性。我们发现，虽然硬尖峰的峰值能量（$ e _ {\ rm p} $）比EE的峰值要好一些，但它们的液体是可比的。较难的$ e _ {\ rm p} $似乎对应于更大的通量和峰值通量，对于硬尖峰和EE组件，散布较大。此外，将硬尖峰和EE的$ e _ {\ rm p} $与其他短grb进行了比较。最后，我们还将GRB 170817A的性质与具有EE的短GRB进行了比较，并且在它们之间没有明显的统计差异。我们发现GRB 170817a具有最低的$ e _ {\ rm p} $，这可能是因为它是离轴的。
Short GRBs with extended emission (EE) that are composed initially of a short-hard spike and followed by a long-lasting EE, are thought to be classified as a subsection of short GRBs. The narrow energy band available during the {\em Swift} era combined with a lack of spectral information prevented discovery of the intrinsic properties of those events. In this paper, we performed a systematic search of short GRBs with EE by using all available {\em Fermi}/GBM data. The search identified 26 GBM-detected short GRBs with EE that are similar to GRB 060614 observed by {\em Swift}/BAT. We focus on investigating the spectral and temporal properties for both the hard spike and the EE components of all 26 GRBs, and explore differences and possible correlations between them. We find that while the peak energy ($E_{\rm p}$) of the hard spikes is a little bit harder than that of the EE, but their fluences are comparable. The harder $E_{\rm p}$ seems to correspond to a larger fluence and peak flux with a large scatter for both the hard spike and EE components. Moreover, the $E_{\rm p}$ of both the hard spikes and EE are compared to other short GRBs. Finally, we also compare the properties of GRB 170817A with those short GRBs with EE and find no significant statistical differences between them. We find that GRB 170817A has the lowest $E_{\rm p}$, likely because it was off-axis.
