TITLE: GCN CIRCULAR NUMBER: 8232 SUBJECT: GRB 080915: Swift/UVOT Upper Limits DATE: 08/09/15 13:39:55 GMT FROM: Alice Breeveld at MSSL-UCL A. Breeveld (MSSL-UCL) and S.R. Oates (MSSL-UCL) report on behalf of the Swift/UVOT team: The Swift/UVOT observed the field of GRB 080915 (Oates et al., GCN Circ. 8227) with settled exposures starting 3872s after the trigger. We do not find a source in any of the UVOT observations inside the XRT error circle (Evans et al., GCN Circ. 8231). The 3-sigma upper limits in the UVOT photometric system (Poole et al. 2008, MNRAS, 383, 627) for detecting a source in the first white finding chart exposure and subsequent co-added exposures are: Filter T_start T_stop Exp Mag (3-sigma UL) (s) (s) (s) ========================================================= white (FC) 3872 3972 98.2 > 19.9 white 5004 5204 196.6 > 20.5 v 3979 4179 196.6 > 18.8 v 9633 10539 885.1 > 19.7 b 4799 4999 196.6 > 19.6 u 4594 4794 196.6 > 19.1 uvw1 4389 4589 196.6 > 19.3 uvm2 4184 11087 731.3 > 20.4 uvw2 5210 5329 117.3 > 19.6 The values quoted above are not corrected for the expected Galactic extinction corresponding to a reddening of E(B-V) = 0.049 mag in the direction of the burst (Schlegel et al. 1998).