The optical rebrightening of GRB100814A: an interplay of forward and reverse shocks?
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Date
2015
Journal Title
Journal ISSN
Volume Title
Publisher
OXFORD UNIV PRESS
Abstract
We present a wide data set of gamma-ray, X-ray, UV/Opt/IR (UVOIR), and radio observations of the Swift GRB100814A. At the end of the slow decline phase of the X-ray and optical afterglow, this burst shows a sudden and prominent rebrightening in the optical band only, followed by a fast decay in both bands. The optical rebrightening also shows chromatic evolution. Such a puzzling behaviour cannot be explained by a single component model. We discuss other possible interpretations, and we find that a model that incorporates a long-lived reverse shock and forward shock fits the temporal and spectral properties of GRB100814 the best.
Description
Keywords
radiation mechanism: non-thermal, shock waves, gamma-ray burst: general, GAMMA-RAY BURST, CONTINUOUS ENERGY INJECTION, AFTERGLOW LIGHT CURVES, SWIFT XRT DATA, X-RAY, BLAST WAVES, COMPREHENSIVE ANALYSIS, JET SIMULATIONS, GRB AFTERGLOWS, TELESCOPE