Gendre 2011 GRB 101024A的余辉

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Title:		The puzzling temporally variable optical and X-ray afterglow of GRB 101024A
Authors:		Gendre, B.; Stratta, G.; Laas-Bourez, M.; Coward, D. M.; Klotz, A.; Cutini, S.; Boër, M.; Stockdale, C.
Affiliation:		AA(ASI Science Data Center, via Galileo Galilei, 00044, Frascati (RM), Italy bruce.gendre@asdc.asi.it), AB()
Publication:		Astronomy & Astrophysics, Volume 530, id.A74 (A&A Homepage)
Publication Date:		06/2011
Origin:		EDP Sciences
Keywords:		gamma-ray burst: general
DOI:		10.1051/0004-6361/201116794
Bibliographic Code:		2011A&A...530A..74G

Abstract

Aims: We present the optical observations of the afterglow of the Swift burst GRB 101024A and try to reconcile these observations with the X-ray afterglow data of GRB 101024A using current afterglow models
Methods: We employ early optical observations, using the Zadko Telescope combined with X-ray data, to compare them with the reverse shock/forward shock model.
Results: The early optical light curve reveals a very unusual steep decay index of α ~ 5. This is followed by a flattening and possibly a plateau phase coincident with a similar feature in the X-ray. We discuss these observations in the framework of the standard reverse shock/forward shock model and energy injection. The plateau phase might also be the signature of the formation of a new magnetar.

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