GCN Circular 15581
Subject
GRB 131205A: Swift/UVOT Upper Limits
Event
Date
2013-12-05T17:40:58Z (12 years ago)
From
Craig Swenson at PSU/Swift <cswenson@astro.psu.edu>
C. A. Swenson (PSU) and T. N. Ukwatta (MSU)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 131205A
94 s after the BAT trigger (Ukwatta et al., GCN Circ. 15578).
No optical afterglow consistent with the enhanced XRT position
(Beardmore et al. GCN Circ. 15580) is detected in the initial UVOT
exposures. Because the spacecraft attitude was not stable during
the first finding chart exposure, we do not report on that exposure here.
Preliminary 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the second
finding chart (FC) exposure and subsequent exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
u_FC 306 556 246 >20.8
white 586 12884 1171 >21.7
v 636 6778 471 >20.5
b 561 12313 1160 >21.5
u 306 11400 1386 >22.0
w1 685 7121 385 >20.4
m2 660 6983 471 >20.4
w2 611 6574 471 >20.6
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.26 in the direction of the burst
(Schlegel et al. 1998).