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arXiv 1004.3389astro-ph.HE
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在RHESSI数据样本中发现的伽马射线暴类别

Gamma-Ray Burst Classes Found in the RHESSI Data Sample

J. Ripa, C. Wigger, D. Huja, R. Hudec

摘要:

本文对RHESSI卫星测量的427个伽马射线暴(GRB)样本进行了统计研究,以确定GRB群的数目。以前的研究基于BATSE目录和最近的雨燕数据声称存在一个中间GRB组,除了长和短的群体。仅使用伽玛暴时程T90和卡方检验或F检验,我们没有发现任何具有统计学意义的中间组。然而,一维和二维硬度与T90平面的极大似然比检验揭示了中间组的现实。因此,这个群体的存在不仅来自BATSE和Swift数据集,而且来自RHESSI结果。

英文摘要:

A sample of 427 gamma-ray bursts (GRBs), measured by the RHESSI satellite, is studied statistically to determine the number of GRB groups. Previous studies based on the BATSE Catalog and recently on the Swift data claim the existence of an intermediate GRB group, besides the long and short groups. Using only the GRB durations T90 and chi^2 or F-test, we have not found any statistically significant intermediate group. However, the maximum likelihood ratio test, one-dimensional as well as two-dimensional hardness vs. T90 plane, reveal the reality of an intermediate group. Hence, the existence of this group follows not only from the BATSE and Swift datasets, but also from the RHESSI results.

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。

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