伽马射线暴余辉光变曲线中缺失的X射线中断仅仅是隐藏的吗？
Are the missing X-ray breaks in Gamma-ray Burst afterglow light curves merely hidden?
摘要：
与BeppoSAX或前斯威夫特时代相比，斯威夫特时代的伽马射线暴余辉观测缺乏消色差喷流中断。具体地说，相对较少的中断，与射流中断一致，观察到这些爆发的X射线光变曲线。如果这些中断真的丢失了，它对解释伽玛暴喷流准直和能量需求以及伽玛暴作为宇宙学工具的使用具有严重的后果。在这里，我们解决的问题，X射线突破，可能是“隐藏”，因此光变曲线被误解为单次幂定律。我们通过合成XRT光变曲线和拟合单一和破碎的幂律，并通过蒙特卡罗分析比较每个拟合的相对优度。即使有斯威夫特时代采样良好的光变曲线，这些突变也可能被错误识别，因此在明确声明不存在消色差突变时需要谨慎。
英文摘要：
Gamma-ray burst afterglow observations in the Swift era have a perceived lack of achromatic jet breaks compared to the BeppoSAX, or pre-Swift era. Specifically, relatively few breaks, consistent with jet breaks, are observed in the X-ray light curves of these bursts. If these breaks are truly missing, it has serious consequences for the interpretation of GRB jet collimation and energy requirements, and the use of GRBs as cosmological tools. Here we address the issue of X-ray breaks that are possibly `hidden' and hence the light curves are misinterpreted as being single power laws. We do so by synthesising XRT light curves and fitting both single and broken power laws, and comparing the relative goodness of each fit via Monte Carlo analysis. Even with the well sampled light curves of the Swift era, these breaks may be left misidentified, hence caution is required when making definite statements on the absence of achromatic breaks.
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