Continuous optical monitoring during the prompt emission of GRB 060111B

A Klotz, B Gendre, G Stratta, JL Atteia, M Boer, F Malacrino, Y Damerdji, R Behrend

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Abstract

Aims. We present the time-resolved optical emission of GRB 060111B during its prompt phase, measured with the TAROT robotic observatory. This is the first time that the optical emission from a gamma-ray burst has been continuously monitored with a temporal resolution of a few seconds during the prompt gamma-ray phase.

Methods. The temporal evolution of the prompt optical emission at the level of several seconds is used to provide a clue to the origin of this emission.

Results. The optical emission was found to decay steadily from our first measure, 28 s after the trigger, in contrast to the gamma-ray emission, which exhibits strong variability at the same time. This behaviour strongly suggests that the optical emission is due to the reverse shock.

Original languageEnglish
Pages (from-to)L39-L42
Number of pages4
JournalASTRONOMY & ASTROPHYSICS
Volume451
Issue number3
DOIs
Publication statusPublished - Jun 2006
Externally publishedYes

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