GRB 050509B: Constraints on Short Gamma-Ray Burst Models

@article{Hjorth2005GRB0C,
  title={GRB 050509B: Constraints on Short Gamma-Ray Burst Models},
  author={Jens Hjorth and Jesper Sollerman and Javier Gorosabel and Jonathan Granot and S. Klose and Chryssa Kouveliotou and Jens Melinder and Enrico Ramirez-Ruiz and Rhaana L. C. Starling and Bjarne Thomsen and Michael I. Andersen and Johan P. U. Fynbo and Brian L. Jensen and Paul M. Vreeswijk and Jos'e Mar'ia Castro Cer'on and P. Jakobsson and Andrew J. Levan and Kristian Pedersen and James E. Rhoads and Nial R. Tanvir and Darach Watson and R. A. M. J. Wijers},
  journal={The Astrophysical Journal Letters},
  year={2005},
  volume={630},
  pages={L117 - L120}
}
We have obtained deep optical images with the Very Large Telescope at ESO of the first well-localized short-duration gamma-ray burst, GRB 050509B. From V and R imaging, initiated ~2 days after the GRB trigger and lasting up to three weeks, we detect no variable object inside the small Swift XRT X-ray error circle down to 2 σ limits of V = 26.5 and R = 25.1. The X-ray error circle includes a giant elliptical galaxy at z = 0.225, which has been proposed as the likely host of this GRB. Our limits… 

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