标题： 伽马射线暴的银河分布 显示英文标题

标题： On the Galactic Distribution of Gamma Ray Bursts

摘要： 夸肖尼克和兰姆（1993）定义了一个伽马射线暴（GRB）的子样本，该样本来自公开可用的BATSE数据库，并显示出朝向银河平面的聚集现象，得出所有GRB都起源于银河系的结论。 这些暴的选取（在本工作中被复制为样本1）涉及未校正视角的峰值计数率（以每秒计数为单位）。 我们认为一个暴的峰值流量在物理上比峰值计数率更有意义。 使用QL样本中相应峰值流量（以每平方厘米每秒光子数为单位）作为限制条件，我们发现了另外24个暴，我们将它们包括在一个新的样本（样本2）中。 我们发现样本2中的各向异性显著性远低于样本1，这不支持QL对各向异性的解释，即认为各向异性是由银河系群体引起的。 为了对各向同性做出有意义的统计陈述，暴样本必须具有超过最小流量的峰值流量，这是由要求从相对于GRO的任何方向（地平线以上）在任何观测到暴的检测阈值下都能探测到暴来确定的。 我们发现这样一个样本对各向同性的偏离（2.6西格玛）微不足道，我们认为这不足以证明GRB起源于银河系的说法。 显示英文摘要

摘要： Quashnock and Lamb (1993) defined a sub-sample of Gamma-ray Bursts (GRBs) from the publicly available BATSE database which shows clumping toward the galactic plane, and concluded that all GRBs are galactic in origin. The selection of these bursts (duplicated in this work in Sample 1) involved a peak countrate (in counts s-1) uncorrected for aspect. We assert that the peak flux of a burst is physically more meaningful than peak count-rate. Using, as limits, the corresponding peak fluxes (in photons cm-2 s-1) for the bursts in the QL sample, we find an additional 24 bursts, which we include in a new sample (Sample 2). We find that the significance of anisotropy in Sample 2 is much less than that of Sample 1, which does not support QL's interpretation of the anisotropies as being due to a galactic population. To make meaningful statistical statements regarding isotropy, burst samples must have peak fluxes above a minimum flux, set by the requirement that a burst be detectable from any direction (above the horizon) with respect to GRO, at any detection threshold at which a burst was observed in that sample. We find that a sample of such bursts has a marginal (2.6 sigma) deviation from isotropy, which we consider insufficient to justify the claim that GRBs are galactic in origin.