GCN Circular 20261
F. E. Marshall (NASA/GSFC) 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 161214B 295 s after the BAT trigger (D'Avanzo et al., GCN Circ. 20257). A single source is detected within the enhanced XRT error region (Evans, GCN Circ. 20259) in the initial UVOT exposures. The source position is consistent with that of SDSS J001524.26+072108.5 and also with that of an entry in the USNO-B1.0 catalog. Since the two UVOT exposures were taken with different filters, it is not yet possible to report on variability. It is possible that some of the flux is due to an optical afterglow (as suggested for NOT observations by Malesani et al. GCN Circ. 20260). Preliminary detections using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding chart (FC) exposures are: Filter T_start(s) T_stop(s) Exp(s) Mag u_FC 295 545 246 18.4 +/- 0.2 white_FC 872 955 82 18.1 +/- 0.2 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.08 in the direction of the burst (Schlegel et al. 1998).