Galaxy Clusters Associated with Short GRBs. I. The Fields of GRBs 050709, 050724, 050911, and 051221a

@article{Berger2007GalaxyCA,
  title={Galaxy Clusters Associated with Short GRBs. I. The Fields of GRBs 050709, 050724, 050911, and 051221a},
  author={Edo Berger and Min-Su Shin and John S. Mulchaey and Tesla E. Jeltema},
  journal={The Astrophysical Journal},
  year={2007},
  volume={660},
  pages={496 - 503}
}
We present a search for galaxy clusters in the fields of three bona fide short gamma-ray bursts (050709, 050724, and 051221a) and the putative short-burst GRB 050911, using multislit optical spectroscopy. These observations are part of a long-term program to constrain the progenitor age distribution based on the fraction of short GRBs in galaxy clusters and early-type galaxies. We find no evidence for cluster associations at the redshifts of the first three bursts, but we confirm the presence… 
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