• DOI:10.1088/0004-637X/748/2/132
• Corpus ID: 27441231

UNUSUAL CENTRAL ENGINE ACTIVITY IN THE DOUBLE BURST GRB 110709B

@article{Zhang2011UNUSUALCE,
  title={UNUSUAL CENTRAL ENGINE ACTIVITY IN THE DOUBLE BURST GRB 110709B},
  author={Bin-Bin Zhang and David N. Burrows and Bing Zhang and P{\'e}ter M{\'e}sz{\'a}ros and Xiang-Yu Wang and Giulia Stratta and Valerio D’Elia and Dmitry D. Frederiks and Sergey Golenetskii and Jay R. Cummings and Jay Norris and Abraham D. Falcone and Scott Douglas Barthelmy and Neil A. Gehrels},
  journal={The Astrophysical Journal},
  year={2011},
  volume={748}
}

• Bin-Bin Zhang, D. Burrows, +11 authors N. Gehrels
• Published 12 November 2011
• Physics
• The Astrophysical Journal

The double burst, GRB 110709B, triggered the Swift/Burst Alert Telescope (BAT) twice at 21:32:39 UT and 21:43:45 UT, respectively, on 2011 July 9. This is the first time we observed a gamma-ray burst (GRB) with two BAT triggers. In this paper, we present simultaneous Swift and Konus-WIND observations of this unusual GRB and its afterglow. If the two events originated from the same physical progenitor, their different time-dependent spectral evolution suggests they must belong to different episodes of the central engine, which may be a magnetar-to-BH accretion system.