TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4958 SUBJECT: GRB 060413: No Optical Afterglow in Swift/UVOT TDRSS Data DATE: 06/04/13 20:55:46 GMT FROM: Stephen Holland at USRA/NASA/GSFC/SSC GRB 060413: No Optical Afterglow in Swift/UVOT TDRSS Data Padi Boyd (GRFC), R. E. Weigand (GSFC), Stephen T. Holland (GSFC/USRA) and Alex Blustin (MSSL) report on behalf of the Swift/UVOT team: UVOT took a finding chart exposure of GRB 060413 (Pagani et al. 2006, GCN Circular 4957). The exposure length was 400 seconds with the V filter starting 960 seconds after the BAT trigger. No afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers the entire XRT error circle. The 3-sigma upper limit inside the XRT error circle is 19.2 mag. We note that this GRB occurred at a Galactic latitude of -1.04 degrees and the estimated Galactic reddening along this line of sight is E_{B-V} = 1.95 mag (Schlegel et al. 1998).