GCN Circular 16990
A. Breeveld (MSSL/UCL) and C. Pagani (U. Leicester) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 141028A 31037 s after the LAT trigger (Bissaldi et al., GCN Circ. 16969). A fading source is detected in the initial exposures (Siegel and Pagani, GCN Circ., 16979) in the position given in that circular, also consistent with MASTER (Gorbovsky et a., GCN, Circ 16972), GROND (Graham et al., GCN Circ. 16977) and the XRT (Pagani, et al., GCN Circ 16986). 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 u 31037 31179 140 19.0+-0.18 u 69790 72355 2525 20.7+-0.13 u 105469 127705 4880 21.3+-0.18 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.05 in the direction of the burst (Schlegel et al. 1998).