arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0809.1796astro-ph
收藏

短伽马射线暴的延发

Extended Emission of Short Gamma-Ray Bursts

Lin Lin, En-Wei Liang, Bin-Bin Zhang, Shuang Nan Zhang

摘要:

本文给出了用Swift/BAT观测到的短/中持续时间伽玛暴延发的初步分析结果。利用贝叶斯分块算法分析了不同波段的光变曲线的时间结构和爆发持续时间。我们在这里显示的结果,三个爆发(伽玛暴050724,061006和070714 B),有一个突出的软扩展发射分量在我们的样本。这些爆发的扩展发射是一个连续的,闪烁的成分,持续$\sim 100$秒后的伽玛射线暴触发在15-25千电子伏的频带。如果不考虑这个分量,这三个暴被归类为短暴,具有$T_{90}=2\sim 3$秒。GRB 060614有一个类似于扩展发射的发射分量,但这个分量具有脉冲状结构,可能表明这个发射分量与GRB 050724、061006和070714 B中观察到的不同。扩展发射成分的光谱演化行为的进一步分析正在进行中。

英文摘要:

Preliminary results of our analysis on the extended emission of short/medium duration GRBs observed with Swift/BAT are presented. The Bayesian blocks algorithm is used to analyze the burst durations and the temporal structure of the lightcurves in different energy bands. We show here the results of three bursts (GRBs 050724, 061006 and 070714B) that have a prominent soft extended emission component in our sample. The extended emission of these bursts is a continuous, flickering-liked component, lasting $\sim 100$ seconds post the GRB trigger at 15-25 keV bands. Without considering this component, the three bursts are classified as short GRBs, with $T_{90}=2\sim 3$ seconds. GRB 060614 has an emission component similar to the extended emission, but this component has pulse-liked structure, possibly indicating that this emission component is different from that observed in GRBs 050724, 061006, and 070714B. Further analysis on the spectral evolution behavior of the extended emission component is on going.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑