TITLE: GCN CIRCULAR NUMBER: 17166 SUBJECT: GRB 141212B: initial Swift/UVOT observations DATE: 14/12/12 18:11:42 GMT FROM: Samantha Oates at MSSL S. R. Oates (IAA-CSIC/UCL-MSSL), M. H. Siegel (PSU) and M. Stamatikos (OSU/NASA/GSFC) report on behalf of the Swift-UVOT team: UVOT took a finding chart exposure of GRB 141212B of 127 seconds with the White filter starting 402 seconds after the BAT trigger (trigger=621234). No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers the preliminary XRT error circle (Kennea et al. GCN Circ. 17165). The typical 3-sigma upper limit has been about 19.6 mag. The 8'x8' region for the list of sources generated on-board covers 100% of the BAT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.03.