TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5172 SUBJECT: GRB060526: Further Swift-UVOT Observations DATE: 06/05/27 04:28:15 GMT FROM: Peter Brown at PSU P. J. Brown (Penn State), S. Campana (INAF-OAB), P. T. Boyd (NASA/GSFC), & F. E. Marshall (NASA/GSFC), report on behalf of the Swift UVOT team: The afterglow of GRB060526 (BAT Trigger 211957) reported in Campana et al. (GCN 5162) is also detected by UVOT in the B filter, as well as the previously reported V and White filters, and continues to fade. We report the following additional UVOT detections: Filter Tstart-Tstop(s) Exp(s) Mag Err White 6335-6534 200 19.2 0.2 V 5311-5511 200 18.2 0.2 V 6744-6944 200 18.6 0.2 B 665-675 10 18.2 0.4 B 6130-6330 200 19.4 0.2 The afterglow is not detected in any filters blueward of B, consistent with the z=3.21 redshift measured by Berger & Gladders (GCN 5170). The 3 sigma upper limits in summed images are: Filter Tstart-Tstop(s) Exp(s) UpperLimit(3sigma) U 641-1492 58 >19.1 W1 617-1468 58 >19.1 M2 593-1444 58 >19.0 W2 693-1554 78 >19.6 In addition, examination of the event mode data of the first V band observation, spanning 188 to 588 seconds after the trigger, shows an optical flare coincident with the flare seen by BAT and XRT (Campana et al. GCN 5163).