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arXiv 1003.5052astro-ph.CO
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没有足够的证据支持雨燕时代伽马射线暴和前景星系团之间的相关性

No Enough Evidence In Support Of Correlation Between Gamma-ray Bursts And Foreground Galaxiy Clusters In the Swift Era

J. Wang, J. Y. Wei

摘要:

本文用精确定位的Swift/XRT γ暴(精度可达几角秒)重新研究了遥远的伽马射线暴(GRB)与前景星系团之间的相关性。星系团是由X射线选择的ROSAT最亮星系团样本(BCS)和BCS扩展通过要求$δ\geq0\degr$和$b\geq20\degr$编制的。满足上述选择标准的Swift/XRT GRB与集群交叉相关。最近邻分析和角两点交叉关联函数都表明,没有足够的证据支持伽玛暴与前景星团之间的相关性。我们认为这种非相关性可能与γ暴数-通量关系的斜率有关。

英文摘要:

The correlation between distant Gamma-Ray Bursts (GRBs) and foreground galaxy clusters is re-examined by using the well localized (with an accuracy down to a few arcseconds) Swift/XRT GRBs. The galaxy clusters are compiled from both X-ray selected ROSAT brightest cluster sample (BCS) and BCS extension by requiring $δ\geq0\degr$ and $b\geq20\degr$. The Swift/XRT GRBs fulfilling the above selection criteria are cross-correlated with the clusters. Both Nearest-Neighbor Analysis and angular two-point cross-correlation function show that there is no enough evidence supporting the correlation between the GRBs and foreground clusters. We suggest that the non-correlation is probably related to the GRB number-flux relation slope.

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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