A NEW POPULATION OF ULTRA-LONG DURATION GAMMA-RAY BURSTS

@article{Levan2013ANP,
  title={A NEW POPULATION OF ULTRA-LONG DURATION GAMMA-RAY BURSTS},
  author={Andrew J. Levan and Nial R. Tanvir and Rhaana L. C. Starling and K. Wiersema and Kim L Page and Daniel A. Perley and Steve Schulze and Graham A. Wynn and Ryan Chornock and Jens Hjorth and S. Bradley Cenko and A. S. Fruchter and P. T. O’Brien and G. C. Brown and Rachel L. Tunnicliffe and Daniele B. Malesani and P. Jakobsson and Darach J. Watson and Edo Berger and David Bersier and B. E. Cobb and Stefano Covino and A. Cucchiara and Antonio de Ugarte Postigo and Derek B. Fox and Avishay Gal-yam and Paolo Goldoni and Javier Gorosabel and Lex Kaper and Thomas Kruehler and Raine Karjalainen and J. P. Osborne and E. Pian and Roberto Sanchez-Ramirez and B P Schmidt and Ian Skillen and Gianpiero Tagliaferri and Christina C. Thone and Ovidiu Văduvescu and Ramj Wijers and B. Ashley Zauderer},
  journal={The Astrophysical Journal},
  year={2013},
  volume={781},
  pages={13}
}
We present comprehensive multiwavelength observations of three gamma-ray bursts (GRBs) with durations of several thousand seconds. We demonstrate that these events are extragalactic transients; in particular, we resolve the long-standing conundrum of the distance of GRB 101225A (the "Christmas-day burst"), finding it to have a redshift z = 0.847 and showing that two apparently similar events (GRB 111209A and GRB 121027A) lie at z = 0.677 and z = 1.773, respectively. The systems show extremely… Expand
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References

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