Unusual Central Engine Activity in the Double Burst GRB 110709B
High Energy Astrophysical Phenomena
2013-10-11 v2
Abstract
The double burst, GRB 110709B, triggered Swift/BAT twice at 21:32:39 UT and 21:43:45 UT, respectively, on 9 July 2011. This is the first time we observed a 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.
Keywords
Cite
@article{arxiv.1111.2922,
title = {Unusual Central Engine Activity in the Double Burst GRB 110709B},
author = {Bin-Bin Zhang and David Burrows and Bing Zhang and Peter Meszaros and Xiang-Yu Wang and Giulia Stratta and Valerio D'Elia and Dmitry Frederiks and Sergey Golenetskii and Jay R. Cummings and Jay P. Norris and Abraham Falcone and Scott D. Barthelmy and Neil Gehrels},
journal= {arXiv preprint arXiv:1111.2922},
year = {2013}
}
Comments
10 pages, 14 figures, 2 tables. ApJ accepted