GCN Circular 13448
A. A. Breeveld (MSSL-UCL) and M. J. Page (MSSL-UCL) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 120711A 8216 s after the INTEGRAL trigger (Gotz et al., GCN Circ. 13434). No significant optical afterglow consistent with the position given in Lacluyze et al. (GCN_Circ. 13430) is detected in the initial UVOT exposures. However, in the U filter, the source may be detected at this position with a significance of 2 sigma. The possible detection is included in the table. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the initial exposures are: Filter T_start(s) T_stop(s) Exp(s) Mag b 8464 8480 16 >18.7 u 8380 8459 79 >19.4 w1 8216 8375 157 >19.8 u 8380 8459 79 19.6 � 0.5 (2sig) The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.08 in the direction of the burst (Schlegel et al. 1998).