TITLE: GCN CIRCULAR NUMBER: 32310 SUBJECT: GRB 220701A: Swift/UVOT Upper Limits DATE: 22/07/01 11:27:13 GMT FROM: Samantha Oates at MSSL S. R. Oates (U. Birmingham) and P. A. Evans (U. Leicester) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 220701A 175 s after the BAT trigger (Evans et al., GCN Circ. 32306). No optical afterglow consistent with the XRT position (Evans et al. GCN Circ. 32308) 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 175 325 147 >21.0 u_FC 333 583 246 >20.2 white 175 1884 424 >21.6 v 665 1758 136 >19.2 b 589 1858 136 >20.2 u 333 1833 363 >20.5 w1 714 1808 117 >19.4 w2 640 1906 55 >18.5 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.008 in the direction of the burst (Schlegel et al. 1998).