TITLE: GCN CIRCULAR NUMBER: 12812 SUBJECT: GRB 120106A: TAROT Calern observatory optical observations DATE: 12/01/06 18:08:30 GMT FROM: Alain Klotz at CESR-CNRS Klotz A. (IRAP-CNRS-OMP), Gendre B. (ASDC/INAF-OAR), Boer M. (OCA-CNRS), Atteia J.L. (IRAP-CNRS-OMP) report: We imaged the field of GRB 120106A detected by SWIFT (trigger 511235) with the TAROT robotic telescope (D=25cm) located at the Calern observatory, France. The observations started 169 min. after the GRB trigger, just at the beginning of the night over Calern. The elevation of the field increased from 52 degrees above horizon and weather conditions were excellents. We co-added a series of exposures. We did not found any optical counterpart in the error box of the XRT candidate (Immler et al. GCNC 12810): Start End Rlim 169 min 212 min 19.3 Magnitudes were estimated with the nearby USNO-B1 stars and are not corrected for galactic dust extinction. This message may be cited.