TITLE: GCN CIRCULAR NUMBER: 15671 SUBJECT: GRB 140103A: Swift/UVOT Upper Limits DATE: 14/01/03 18:13:02 GMT FROM: Mike Siegel at PSU/Swift MOC M. H. Siegel and V. Mangano (PSU) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 140103A 172 s after the BAT trigger (Mangano et al., GCN Circ. 15656). No optical afterglow consistent with the XRT position (Mangano et al., GCN Circ 15666) 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 first finding chart (FC) exposure and subsequent exposures are: Filter T_start(s) T_stop(s) Exp(s) Mag white_FC 172 321 147 >20.8 white 172 2581 361 >21.5 v 406 2631 252 >19.1 b 506 2557 233 >19.9 u 480 2704 252 >19.5 w1 456 2680 252 >19.6 m2 6760 8396 393 >20.0 w2 382 2607 252 >19.9 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).