GCN Circular 10124
Subject
GRB 091102: Swift/UVOT Upper Limits
Date
2009-11-03T05:23:32Z (15 years ago)
From
Erik Hoversten at Swift/Penn State <hoversten@astro.psu.edu>
E. A. Hoversten (PSU) reports on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 091102
986s after the BAT trigger (Hoversten et al., GCN 10117). We do not
detect any source at the enhanced Swift XRT position (Kennea et
al. GCN 10120). UVOT magnitude 3-sigma upper limits are reported in
the following table:
Filter T_start T_stop Exp(s) Mag (3-sigma upper limit)
-------------------------------------------------------------
WHITE 986 1136 147 > 20.05
v 1267 1287 19 > 17.18
b 1193 1213 19 > 18.09
u 1168 1188 19 > 17.70
uvw1 1144 1164 19 > 17.70
uvm2 1292 1301 9 > 16.61
uvw2 1243 1263 19 > 17.79
The quoted upper limits have not been corrected for the expected
Galactic extinction along the line of sight of E_(B-V) = 0.07 mag
(Schlegel et al. 1998). All photometry is on the UVOT photometric
system described in Poole et al. (2008, MNRAS, 383, 627).