TITLE: GCN CIRCULAR NUMBER: 24792 SUBJECT: GRB 190611A: Swift/UVOT Upper Limits DATE: 19/06/12 17:31:41 GMT FROM: Kira Simpson at PSU GRB 190611A: Swift/UVOT Upper Limits K. K. Simpson (PSU) and V. D'Elia (SSDC) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 190611A 118 s after the BAT trigger (D'Elia et al., GCN Circ. 24785). No optical afterglow consistent with the XRT position (Goad et al., GCN Circ. 24786) RA (J2000): 21h 38m 53.44s Dec (J2000): -56d 04' 27.3" 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 118 268 147 >20.1 u_FC 276 525 246 >19.2 white 118 917 186 >20.0 u 276 525 246 >19.2 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.04 in the direction of the burst (Schlegel et al. 1998).