TITLE: GCN CIRCULAR NUMBER: 27108 SUBJECT: GRB 200216B: Swift/UVOT Upper Limits DATE: 20/02/16 22:15:58 GMT FROM: Paul Kuin at MSSL N. P. M. Kuin (UCL-MSSL) and P. D'Avanzo (INAF-OAB) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 200216B 124 s after the BAT trigger (D'Avanzo et al., GCN Circ. 27102). No optical afterglow consistent with the XRT position (Goad et al. GCN Circ. 27106) 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 124 274 147 >21.0 white 124 1535 334 >21.5 w1 1095 1635 39 >20.2 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.02 in the direction of the burst (Schlegel et al. 1998).