GCN Circular 6293
P. Schady (MSSL/PSU) and P.Romano (Univ. Bicocca & INAF-OAB) report on behalf of the Swift UVOT team: Swift/UVOT observed the field of GRB 070412 starting 97.6s after the BAT trigger. No new source is detected within the XRT refined position (GCN 6282) or at the position reported by Jelinek et al. (GCN 6279) and Berger et al. (GCN 6280) in any of the UVOT filters, in either single or co-added exposures. The 3-sigma upper limits for the co-added exposures in each filter are as follows: Filter T_mid Exp. Mag 3-sig UL (s) (s) White 9252 936 20.55 V 17432 1769 20.52 B 5763 171 20.22 U 23567 1082 21.12 UVW1 23107 1284 20.52 UVM2 19141 1082 20.65 UVW2 14440 1195 20.94 where T_mid is the weighted mid time of the co-added images. The reported upper limits are uncorrected for the estimated Galactic reddening of E(B-V) = 0.02 mag.