Abstract
We present the simultaneous Swift and Fermi observations of the bright GRB 100728A and its afterglow. The early X-ray emission is dominated by a vigorous flaring activity continuing until 1ks after the burst. In the same time interval, high-energy emission is significantly detected by the Fermi/Large Area Telescope. Marginal evidence ofGeV emission is observed up to later times. We discuss the broadband properties of this burst within both the internal and external shock scenarios, with a particular emphasis on the relation between X-ray flares, theGeV emission, and a continued long-duration central engine activity as their power source.
Original language | English |
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Article number | L27 |
Journal | Astrophysical Journal Letters |
Volume | 734 |
Issue number | 2 PART 2 |
DOIs | |
State | Published - 20 Jun 2011 |
Externally published | Yes |
Keywords
- gamma-ray burst: individual (GRB100728A)
- radiation mechanisms: non-thermal
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science