UNUSUAL CENTRAL ENGINE ACTIVITY IN THE DOUBLE BURST GRB 110709B

Journal Article · Sun Apr 01 00:00:00 EDT 2012 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/748/2/132· OSTI ID:22016077

Binbin, Zhang; Burrows, David N; Meszaros, Peter; Falcone, Abraham D ^[1]; Bing, Zhang ^[2]; Xiangyu, Wang ^[3]; Stratta, Giulia; D'Elia, Valerio ^[4]; Frederiks, Dmitry; Golenetskii, Sergey ^[5]; Cummings, Jay R; Barthelmy, Scott D; Gehrels, Neil ^[6]

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1. Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802 (United States)
2. Department of Physics, University of Nevada, Las Vegas, NV 89154 (United States)
3. Department of Astronomy, Nanjing University, Nanjing 210093 (China)
4. ASI-Science Data Center, Via Galileo Galilei, I-00044 Frascati (Italy)
5. Ioffe Physico-Technical Institute, Laboratory for Experimental Astrophysics, 26 Polytekhnicheskaya, St Petersburg 194021 (Russian Federation)
6. NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States)

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.

• OSTI ID: 22016077
• Journal Information: Astrophysical Journal, Vol. 748, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
AFTERGLOW
COSMIC GAMMA BURSTS
GALACTIC EVOLUTION
TELESCOPES
TIME DEPENDENCE