Gendre 2008 Optical Rising in early afterglow

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multi-component emission

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Title:		Rising optical afterglows seen by TAROT
Authors:		Gendre, Bruce; Atteia, Jean-Luc; Boer, Michel; Corsi, Alessandra; Galli, Alessandra; Klotz, Alain; Pelangeon, Alexandre; Piro, Luigi; Cutini, Sara; Preger, Barbara; Stratta, Giulia
Affiliation:		AA(Laboratoire d'Astrophysique de Marseille),AB(LATT, CNRS),AC(Observatoire de Haute Provence),AD(INAF-IASF-Rome),AE(IASF - Roma, INAF),AF(CESR),AG(LATT, Universite de Toulouse, CNRS),AH(IASF/INAF - CNR),AI(ASDC),AJ(ASDC),AK(ASDC)
Publication:		37th COSPAR Scientific Assembly. Held 13-20 July 2008, in Montréal, Canada., p.997
Publication Date:		00/2008
Origin:		ADS
Comment:		Symposium E, session 18 (oral). Paper number: E18-0037-08
Bibliographic Code:		2008cosp...37..997G

Abstract

we present the multi-wavelength observations of GRB 060904B, 070420, 071010A and 080210. These events present a rising part within their optical light curves lasting a few hundred of seconds. In one case (GRB 060904B), a flare occurs at similar time in the X-ray band, while in the other cases the X-ray light curves appear smooth during the optical rise. We investigate the possible nature of this behavior and conclude that a multi-component emission is mandatory to explain the optical afterglow.

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