TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5116 SUBJECT: GRB 060510A: Swift/UVOT Detection of an Optical Afterglow DATE: 06/05/12 12:31:19 GMT FROM: Stephen Holland at USRA/NASA/GSFC/SSC GRB 060510A: Swift/UVOT Detection of an Optical Afterglow S. T. Holland (NASA/GSFC & USRA) reports on behalf of the Swift/UVOT team: The Swift UVOT began observing GRB 060510A (trigger #209351, Krimm et al., GCN Circular 5095) 82 seconds after the BAT trigger. We detect the UVOT optical transient reported in the above Circular in the White, V-, and U-band filters. The J2000 coordinates of the afterglow are RA = 06:23:27.98 Dec = -01:09:46.2 with an uncertainty of +/- 0.56 arcseconds (90% containment). Magnitudes and 3-sigma upper limits are reported below. Midpoint Coadded Upper Filter Time Exposure Mag Err Limit (sec) (sec) (3 sigma) V 405 394 18.38 0.13 V 1060 394 18.85 0.16 B 688 10 18.4 B 1503 20 19.2 U 817 20 18.06 0.40 U 1479 20 18.3 UVW1 645 20 17.1 UVW1 793 20 17.4 UVM2 769 20 17.5 UVM2 1431 20 17.6 UVW2 721 20 17.6 UVM2 1384 20 17.7 White 150 99 18.04 0.15 White 702 10 18.24 0.50 White 1318 99 18.87 0.18 White 1521 10 18.12 0.40 White 1680 10 18.7 No correction has been made for the Galactic reddening of E(B-V) = 0.42 mag (Schlegel et al. 1998) along the line of sight to GRB 060510A.