Wang 2010 伽马暴和前景的星系群不成协

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Title:		Not enough evidence to support the correlation between gamma-ray bursts and foreground galaxy clusters in the Swift Era
Authors:		Wang, Jing; Wei, Jian-Yan
Affiliation:		AA(National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China), AB(National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China)
Publication:		Research in Astronomy and Astrophysics, Volume 10, Issue 6, pp. 533-540 (2010).
Publication Date:		06/2010
Origin:		IOP
DOI:		10.1088/1674-4527/10/6/003
Bibliographic Code:		2010RAA....10..533W

Abstract

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 arcsec) Swift/XRT GRBs. The galaxy clusters are compiled from both the X-ray selected ROSAT brightest cluster sample (BCS) and the BCS extension by requiring δ >= 0° and b >= 20°. The Swift/XRT GRBs fulfilling the above selection criteria are cross-correlated with the clusters. Both Nearest–Neighbor analysis and the angular two-point cross-correlation function show that there is not 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.

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