GCN Circular 8414
P. Schady (MSSL/UCL) and J. Mao (INAF-OAB) report on behalf of the Swift UVOT team. The Swift UltraViolet/Optical Telescope (UVOT) began ToO observations of the Swift-BATSS GRB 081025 (Copete et al., GCN Circ. 8409), 20.7 hours after the trigger. We do not detect any new source at the XRT position reported in GCN Circ. 8411 (Mao et al.) in any of the individual or co-added images down to the following 3-sigma upper limits: Filter Tstart(hrs) Exp(s) 3-sigma UL b 21.2 130 > 19.44 u 20.9 885 > 20.18 uvw1 20.7 1015 > 20.60 uvm2 22.2 886 > 20.63 The values quoted above are on the UVOT Photometric System (Poole et al, 2008, MNRAS 383,627). They are not corrected for the expected Galactic extinction corresponding to a reddening of E(B-V)=0.02 mag in the direction of the burst (Schlegel et al. 1998).