TITLE: GCN CIRCULAR NUMBER: 19228 SUBJECT: GRB160325A Swift/UVOT Detection DATE: 16/03/25 15:25:24 GMT FROM: Marissa McCaule at PSU L. M. McCauley (PSU) and E. Sonbas (Adiyaman Univ.) report on behalf of the Swift/UVOT team: UVOT took a finding chart exposure of 150 seconds with the White filter starting 74 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at RA(J2000) = 01:02:36.28 = 15.65118 DEC(J2000) = -72:41:46.8 = -72.69634 with a 90%-confidence error radius of about 0.61 arc sec. This position is 5.35 arc sec. from the center of the XRT error circle and consistent with the position reported by Fugazza et al. (GCN Circ. 19223). Preliminary detections and 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are: Filter T_start(s) T_stop(s) Exp(s) Mag white_fc 74 160 86 15.48+-0.03 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).