TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4331 SUBJECT: GRB 051210: Swift/UVOT upper limits DATE: 05/12/12 01:34:05 GMT FROM: Alexander Blustin at MSSL-UCL A. J. Blustin (UCL-MSSL), V. Mangano (INAF-IASS), W. Voges (MPE), F. Marshall (GSFC), N. Gehrels (GSFC) on behalf of the Swift/UVOT team report: The Swift/UVOT began observing the field of GRB 051210 at 05:47:43 UT on 2005-12-10, 70 s after the BAT trigger (Mangano et al., GCN 4315). No source was observed in any of the UVOT filters at the refined XRT position (Mangano et al., GCN 4320) or at the position of the Magellan source (Bloom et al. GCN 4330). 3-sigma upper limits in summed images from each of the filters are listed below (not corrected for extinction; E(B-V) = 0.019). Filter T_range(s) Exp(s) 3sigUL(mag) V 70-76498 3721 20.6 B 450-74933 4954 21.7 U 395-70715 4276 21.2 W1 341-81624 4338 21.7 M2 287-80716 4377 22.1 W2 558-75839 4005 22.3 White 503-931 100 19.9