[AAVSO-HEN] GRB 080603B: TAROT Calern observatory confirmation of slow optical decay

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TITLE:   GCN CIRCULAR
NUMBER:  7799
SUBJECT: GRB 080603B: TAROT Calern observatory confirmation of slow optical decay
DATE:    08/06/04 00:41:39 GMT
FROM:    Alain Klotz at CESR-CNRS  <Alain.Klotz at free.fr>

Klotz, A. (CESR-OMP), Boer M. (OHP), Atteia J.L. (LATT-OMP) report:

We imaged the field of GRB 080603B from
68 min to 240 min after the trigger with TAROT.
The light curve displays a slow optical
decay compatible with alpha=0.62 +/- 0.1.
R~18.2 at t0+225 min.