GCN Circular 4233
M. De Pasquale (UCL-MSSL), G. Tagliaferri (INAF-Brera), A.J. Blustin (UCL-MSSL), D. Hinshaw (GSFC-SPSYS), M. Carter (UCL-MSSL), N. Gehrels (GSFC) on the behalf the UVOT/Swift Team: The Swift UVOT began observing the field of GRB051109B at 08:41:03 UT, 84 seconds after the BAT Trigger (Tagliaferri et al, GCN 4222). No new source with respect to USNO B1.0 is detected within the 4 arcsecond radius XRT error circle (Campana et al., GCN 4226), either in the first exposure or in the coadded V-band exposures down to the following 3 sigma magnitude upper limits: Filter T_range (sec) Exp (sec) 3sigUL V 84-284 200 18.9 V 84-8280 4956 20.8 The source previously reported in GCN 4222 was actually an artefact of the onboard processing and was not a real source. These values are not corrected for Galactic extinction.