TITLE: GCN CIRCULAR NUMBER: 32351 SUBJECT: GRB 220706A: Swift/UVOT Upper Limits DATE: 22/07/08 20:06:11 GMT FROM: Sam LaPorte at PSU GRB 220706A: Swift/UVOT Upper Limits S. J. LaPorte (PSU) and A. D'Ai (INAF-IASFPA) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 220706A 107 s after the BAT trigger (D'Ai et al., GCN Circ. 32329). No optical afterglow consistent with the XRT position (Goad et al. GCN Circ. 32333) 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 107 257 147 >20.5 u_FC 320 570 246 >20.0 white 107 1025 334 >20.5 b 751 771 19 >18.5 u 320 570 246 >20.0 w1 701 720 19 >17.8 m2 849 869 19 >18.6 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.025 in the direction of the burst (Schlegel et al. 1998).