GCN Circular 7077
Subject
Swift UVOT upper limits of GRB071112B
Event
Date
2007-11-13T11:59:51Z (18 years ago)
From
Patricia Schady at MSSL/Swift <ps@mssl.ucl.ac.uk>
P. Schady (MSSL-UCL) and M. Perri (ASDC) report on behalf of the Swift
UVOT team:
The Swift UVOT observed the field of GRB 071112B (Perri et al., GCN 7058)
62 minutes after the BAT trigger, once the Earth had come out of observing
constraint. No new source is found in any of the UVOT observations in
either single or co-added exposures within the refined BAT error circle
(Fenimore et al., GCN 7071) or anywhere within the UVOT field of view down
to the following 5-sigma upper limits:
Filter Tmid Exp Magnitude
(s) (s) (5-sigma UL)
White 8864 885 > 20.7
v 3826 197 > 18.2
b 8306 197 > 19.5
u 6905 290 > 19.1
uvw1 4236 197 > 18.8
uvm2 4031 197 > 18.7
uvw2 9419 187 > 18.9
where Tmid is the weighted mean of the co-added exposures. The values
quoted above are not corrected for the expected Galactic extinction
corresponding to a reddening of E(B-V) = 0.12 mag in the direction of the
GRB (Schlegel et al. 1998).