NOTE: uvot_fluxes_wget.pl vrs. 2018-11-07 fem at 190328d18h42m53s715746usUT NOTE: Source region spec. is: 297.816 +39.070 3" NOTE: Used archived BAT position of 297.81600 39.07000 NOTE: position reference is GCN_Position_Notice WARNING: t_start for light curve (52) and t_start from the exposure report (69) do not agree. Replace ??? in draft Circular with correct value. =========== Draft Upper Limit Circular ======== GRB 190327: Swift/UVOT Upper Limits S.W.K. Emery (UCL-MSSL) and ***BA*** (***BA INSTITUTION***) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 190327 ***???*** s after the BAT trigger (***Author*** et al., GCN Circ. ????). No optical afterglow consistent with the BAT position *** POSITION REFERENCE is GCN_Position_Notice *** 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 69 219 147 >20.2 u_FC 281 531 246 >19.3 white 69 5553 454 >20.7 v 612 5964 432 >19.1 b 538 6668 318 >19.8 u 281 6579 659 >19.8 w1 661 6374 432 >19.4 m2 636 6169 432 >19.6 w2 52 5759 441 >19.6 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.25 in the direction of the burst (Schlegel et al. 1998).