GRB 080503: IMPLICATIONS OF A NAKED SHORT GAMMA-RAY BURST DOMINATED BY EXTENDED EMISSION

@article{Perley2008GRB0I,
  title={GRB 080503: IMPLICATIONS OF A NAKED SHORT GAMMA-RAY BURST DOMINATED BY EXTENDED EMISSION},
  author={Daniel A. Perley and Brian D. Metzger and Jonathan Granot and Nathaniel R. Butler and Takanori Sakamoto and Enrico Ramirez-Ruiz and Andrew J. Levan and Joshua S. Bloom and Adam A. Miller and Andrew J. Bunker and H.-W. Chen and Alexei V. Filippenko and N. C. Gehrels and Karl Glazebrook and Patrick B. Hall and Kevin Hurley and Daniel Kocevski and W. D. Li and Silvia Goy Lopez and Jay Norris and Anthony L. Piro and Dovi Poznanski and Jason Xavier Prochaska and Eliot Quataert and Nial R. Tanvir},
  journal={The Astrophysical Journal},
  year={2008},
  volume={696},
  pages={1871 - 1885}
}
We report on observations of GRB 080503, a short gamma-ray burst (GRB) with very bright extended emission (about 30 times the gamma-ray fluence of the initial spike) in conjunction with a thorough comparison to other short Swift events. In spite of the prompt-emission brightness, however, the optical counterpart is extraordinarily faint, never exceeding 25 mag in deep observations starting at ∼1 hr after the Burst Alert Telescope (BAT) trigger. The optical brightness peaks at ∼1 day and then… 

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