TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5069 SUBJECT: GRB 060502B: Swift/UVOT upper limits DATE: 06/05/03 10:37:39 GMT FROM: Tracey Poole at MSSL T. S. Poole (UCL-MSSL), and E. Troja (INAF-IASFPA) on behalf of the Swift/UVOT team. The Swift/UVOT began observing the field of GRB060502b (BAT Trigger=208275, E. Troja, et. al, GCN 5055) at 17:25:38 UT, 57s after the BAT trigger (which includes the 10s V filter settling exposure). No new source is detected at the XRT position (E. Troja, GCN 5063) in coadded images with any of the filters. The following 5-sigma magnitude upper limits are not corrected for Galactic extinction; E(B-V) = 0.044. Filter T_range(s) T_exp(s) 5sigma(mag) V 57-35329 3002 20.29 B 658-24560 1204 20.62 U 634-41112 3819 21.04 UVW1 610-40198 4038 21.29 UVM2 586-36126 3633 21.31 UVW2 686-34417 2259 21.29 WHITE 74-6845 619 20.49 Where T_range is time post-trigger, and T_exp is the exposure time of the observation. A 6 arcsec radius was used for all filters. This message may be cited.