Astronomy and Astrophysics – Astronomy
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...212.1601g&link_type=abstract
American Astronomical Society, AAS Meeting #212, #16.01; Bulletin of the American Astronomical Society, Vol. 40, p.209
Astronomy and Astrophysics
Astronomy
Scientific paper
We examine the spectral evolution properties of gamma-ray bursts (GRBs) observed by the Swift Burst Alert Telescope (BAT) and probe the connection between the prompt emission and the early hard X-ray afterglow. We categorize GRBs with measured redshifts according to their temporal morphology in the 15-150 keV range using mask-weighted light curves. We focus our study on bursts with isolated prompt emission features such as quiescent GRBs (bursts with precursor and/or successor emission) and single-pulse FRED-like GRBs. In particular, the quiescent burst GRB060526 exhibits early ( 250-350 sec) variable X-ray afterglow emission contemporaneous with the BAT successor emission, a possible consequence of refreshed shocks. We find evidence that some single-pulse FRED-like GRBs are the onset of the early hard X-ray afterglow.
Bowers Rebecca
Cook Stephen
Giblin Timothy W.
Hakkila Jon
Patel Sandeep Kumar
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