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 language | English |
|---|---|
| Pages (from-to) | L39-L42 |
| Number of pages | 4 |
| Journal | Astronomy & Astrophysics |
| Volume | 451 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Jun 2006 |
| Externally published | Yes |
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