GCN Circular 15515
C. A. Swenson (PSU) and A. Maselli (INAF-IASFPA) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 131122A 13578 s after the INTEGRAL trigger (Gotz et al., GCN Circ. 15510). No optical counterpart consistent with the potential XRT afterglow position (Maselli et al., GCN Circ. 15513) is detected in the initial UVOT exposures. 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 white 14302 20578 855 >21.3 v 20830 21061 227 >19.0 u 13578 20136 1375 >21.0 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.01 in the direction of the burst (Schlegel et al. 1998).