Not enough evidence to support the correlation between gamma-ray bursts and foreground galaxy clusters in the<i>Swift</i>Era

Wang, Jing; Wei, J. Y.

doi:10.1088/1674-4527/10/6/003

Cited by 1 publication

(4 citation statements)

References 29 publications

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“…Wang & Wei (2010) find no evidence of clustering between Swift XRT afterglows and ROSAT selected galaxy clusters. The purpose of our survey is not to examine large scale anisotropies, but rather the small scale clustering implied by the MgII excess.…”

Section: Discussioncontrasting

confidence: 58%

“…Clustering analysis of GRB afterglows and/or hosts have been performed by Wang & Wei (2010); Bornancini et al (2004). Wang & Wei (2010) find no evidence of clustering between Swift XRT afterglows and ROSAT selected galaxy clusters.…”

Section: Discussionmentioning

confidence: 99%

“…The signal is much more clear from the 4481 galaxies with K AB < 19.3 that we extract from COSMOS-30. Clustering analysis of GRB afterglows and/or hosts have been performed by Wang & Wei (2010); Bornancini et al (2004). Wang & Wei (2010) find no evidence of clustering between SWIFT XRT afterglows and ROSAT selected galaxy clusters.…”

Section: Discussionmentioning

confidence: 99%

“…Clustering analysis of GRB afterglows and/or hosts have been performed by Wang & Wei (2010); Bornancini et al (2004). Wang & Wei (2010) find no evidence of clustering between SWIFT XRT afterglows and ROSAT selected galaxy clusters. The purpose of our survey is not to examine large scale anisotropies, but rather the small scale clustering implied by the MgII excess.…”

Section: Discussionmentioning

confidence: 99%

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Clustering of galaxies around gamma-ray burst sight-lines

Sudilovsky¹,

Greiner²,

Rau³

et al. 2013

A&A

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There is evidence of an overdensity of strong intervening MgII absorption line systems distributed along the lines of sight toward gamma-ray burst (GRB) afterglows relative to quasar sight-lines. If this excess is real, one should also expect an overdensity of field galaxies around GRB sight-lines, as strong MgII tends to trace these sources. In this work, we test this expectation by calculating the two point angular correlation function of galaxies within 120 (∼470 h −1 71 Kpc at z ∼ 0.4) of GRB afterglows. We compare the gamma-ray burst optical and near-infrared detector (GROND) GRB afterglow sample -one of the largest and most homogeneous samples of GRB fields -with galaxies and active galactic nuclei found in the COSMOS-30 photometric catalog. We find no significant signal of anomalous clustering of galaxies at an estimated median redshift of z ∼ 0.3 around GRB sight-lines, down to K AB < 19.3. This result is contrary to the expectations from the MgII excess derived from GRB afterglow spectroscopy, although many confirmed galaxy counterparts to MgII absorbers may be too faint to detect in our sample -especially those at z > 1. We note that the addition of higher sensitivity Spitzer/IRAC or HST/WFC3 data for even a subset of our sample would increase this survey's depth by several orders of magnitude, simultaneously increasing statistics and enabling the investigation of a much larger redshift space.

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Section: Discussioncontrasting

confidence: 58%