GCN Circular 16979
M. H. Siegel (PSU) and C. Pagani (UL) 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). We detect an optical afterglow consistent with the afterglow reported by MASTER (Gorbovsky et a., GCN, Circ 16972), GROND (Graham et al., GCN Circ. 16977) and the XRT (Kennea, et al., GCN Circ 16978). The preliminary UVOT position is: RA (J2000) = 21:30:24.54 = 322.60226 (deg.) Dec (J2000) = -00:13:52.4 = -0.23122 (deg.) with an estimated uncertainty of 0.4 arc sec. (radius, 90% confidence). This is consistent with the GROND and MASTER positions. Preliminary detection using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the initial exposure is: Filter T_start(s) T_stop(s) Exp(s) Mag u 31037 37759 233 19.14+-0.19 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).