TITLE: GCN CIRCULAR NUMBER: 7065 SUBJECT: GRB 071112C: TAROT Calern observatory optical observations DATE: 07/11/12 21:35:14 GMT FROM: Alain Klotz at CESR-CNRS Klotz, A. (CESR-OMP), Boer M. (OHP), Atteia J.L. (LATT-OMP) report: We imaged the field of GRB 071112 detected by SWIFT (trigger 296504) with the TAROT robotic telescope (D=25cm) located at the Calern observatory, France. The observations started 65.0s after the GRB trigger (10.7s after the notice). The elevation of the field increased from from 38 degrees above horizon and weather conditions were fully cloudy until 90 minutes after the GRB. We co-added a series of exposures taken between 98 and 155 min. We detect the OT reported by Perri et al. (GCNC 7059) near the limiting magnitude: t_grb+98 min. to t_grb+155 min. : R = 20.1 +/- 0.3 Magnitudes were estimated with the nearby USNO-B1 stars and are not corrected for galactic dust extinction. This message may be cited.