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Continuous optical monitoring during the prompt emission of GRB 060111B

Alain Klotz·Bruce Gendre·Giulia Stratta·Jean-Luc Atteia·Michel Boer·Frederic Malacrino·Yassine Damerdji·Raoul Behrend
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Abstract

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. 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. The optical emission was found to decay steadily from our first measure, 28s 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.

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Alain Klotz, Bruce Gendre, Giulia Stratta, Jean-Luc Atteia, Michel Boer, Frederic Malacrino, Yassine Damerdji, Raoul Behrend. 2006-04-04. Continuous optical monitoring during the prompt emission of GRB 060111B. https://doi.org/10.1051/0004-6361%3A20065158

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