GCN Circular 13950
Subject
GRB 121028A: Swift/UVOT Upper Limits
Date
2012-11-05T16:58:22Z (11 years ago)
From
Mike Siegel at PSU/Swift MOC <siegel@swift.psu.edu>
M. H. Siegel (PSU) and R. L. C. Starling (U Leicester) report on
behalf of the Swift/UVOT team.
The Swift/UVOT began settled observations of the field of
GRB 121028A 133s after the BAT trigger (Starling et al.,
GCN Circ. 13913). Data summed from the first and second orbits
do not reveal a source at the enhanced position of the X-ray
afterglow (Evans et al., GCN Circ. 13918).
The 3-sigma upper limits for the finding chart (fc) and
summed exposures are reported below:
FILTER T_start(s) T_stop Exposure Mag/3UL
========================================================
white (fc) 133 283 147 >19.96
white 877 7754 540 >21.07
v 6528 6727 196 >18.94
b 2713 2758 44 >19.10
u 345 595 245 >19.43
u 7143 7343 196 >19.68
uvw1 6938 7138 196 >19.61
uvw2 7761 7961 196 >19.90
=======================================================
The above magnitudes are not corrected for the Galactic extinction
corresponding to a reddening of E_{B-V} = 1.41 (Schlegel et al.,
1998, ApJS, 500, 525). The photometry is on the UVOT photometric
system described in Breeveld et al. 2011 (AIP Conf. Proc. 1358, 373)