论文标题
第三次Swift-Bat目录中GRB前体的时间分析
Temporal Analysis of GRB Precursors in the Third Swift-BAT Catalog
论文作者
论文摘要
我们选择52个长伽马射线爆发（GRB），在第三个Swift-Bat目录中具有前体活动。诺里斯函数拟合了前体和主爆发中所示的每个情节。我们系统地分析了前体和主要突发的时间特性。我们没有发现前体的时间曲线和主爆发的时间分布之间没有任何显着差异。前体的光子计数与主爆发的光子计数有关。据指示，前体和主爆发可能具有相同的物理起源，与前体和主爆发遵循相同的$τ_p-ω$关系。但是，我们没有发现前体的能量释放与静止时间之间的明确关系。某些理论模型，例如后备折叠式场景和喷气孔场景，可能有助于解释GRB - 总理现象。
We select 52 long gamma-ray bursts(GRBs) having the precursor activity in the third Swift-BAT catalog. Each episode shown in both the precursors and the main bursts is fitted by the Norris function. We systematically analyze the temporal properties for both the precursors and the main bursts. We do not find any significant difference between the temporal profile of the precursor and that of the main burst. The photon count of the precursor is related to that of the main burst. It is indicated that the precursor and the main burst might have the same physical origin, as the precursor and the main burst follow the same $τ_p-ω$ relation. However, we do not find the explicit relation between the energy release of the precursor and the quiescent time. Some theoretical models, such as the fallback collapsar scenario and the jet-cocoon scenario, may be helpful to explain the GRB-precursor phenomena.
