TITLE: GCN CIRCULAR NUMBER: 16645 SUBJECT: GRB 140730A: Swift/UVOT Upper Limits DATE: 14/07/31 01:35:22 GMT FROM: Mike Siegel at PSU/Swift MOC M. H. Siegel (PSU) and C. B. Markwardt (NASA/GSFC) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 140730A 68 s after the BAT trigger (Markwardt et al., GCN Circ. 16642). No optical afterglow consistent with the XRT position (Evans GCN Circ. 16643) 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 68 218 147 >21.2 u_FC 280 530 246 >19.6 white 68 6182 396 >21.3 v 784 6593 413 >19.5 b 709 5978 216 >20.3 u 280 5772 462 >20.0 w1 660 5568 236 >21.1 m2 5162 6798 393 >20.4 w2 4753 6388 393 >20.6 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.09 in the direction of the burst (Schlegel et al. 1998).