NASA NTRS · 20120008620
Unusual Central Engine Activity in the Double Burst GRB 110709B
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 are from the same physical origin, their different time-dependent spectral evolution suggest they must belong to different episodes of the central engine, which may be a magnetar-to-BH accretion system.
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Zhang, Bin-Bin, Burrows, David N., Zhang, Bing, Meszaros, Peter, Stratta, Giulia, D'Elia, Valerio, Frederiks, Dmitry, Golenetskii, S., Cummings, Jay R., Wang, Xiang-Yu, Falcone, Abraham D., Barthelmy, Scott D., Gehrels, Neil. 2011-11-15. Unusual Central Engine Activity in the Double Burst GRB 110709B. https://ntrs.nasa.gov/citations/20120008620
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