Zhang, Bin-Bin 2011 GRB 110709B的观测

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Title:		Unusual Central Engine Activity in the Double Burst GRB 110709B
Authors:		Zhang, Bin-Bin; Burrows, David; Zhang, Bing; Meszaros, Peter; Wang, Xiang-Yu; Stratta, Giulia; D'Elia, Valerio; Frederiks, Dmitry;Golenetskii, Sergey; Cummings, Jay R.; Norris, Jay P.; Falcone, Abraham; Barthelmy, Scott D.; Gehrels, Neil
Publication:		eprint arXiv:1111.2922
Publication Date:		11/2011
Origin:		ARXIV
Keywords:		Astrophysics - High Energy Astrophysical Phenomena
Comment:		10 pages, 14 figures, 2 tables. ApJ accepted
Bibliographic Code:		2011arXiv1111.2922Z

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.

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