GCN Circular 15443
Subject
GRB 131103A: Swift/UVOT Detection
Date
2013-11-04T15:51:58Z (10 years ago)
From
Frank Marshall at GSFC <femarsha@khamseen.gsfc.nasa.gov>
N. P. M. Kuin (UCL-MSSL), F. E. Marshall (NASA/GSFC), and J. R. Cummings (NASA/UMBC)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 131103A
87 s after the BAT trigger (Cummings et al., GCN Circ. 15440).
A decaying source consistent with the XRT position (Goad et al. GCN Circ. 15442)
is detected in the initial UVOT exposures.
The preliminary UVOT position is:
RA (J2000) = 23:15:40.55 = 348.91894 (deg.)
Dec (J2000) = -44:38:25.4 = -44.64040 (deg.)
with an estimated uncertainty of 0.60 arc sec. (radius, 90% confidence).
Preliminary detections and 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white 87 237 147 19.41 +/- 0.13
white 19290 19893 599 21.45 +/- 0.17
v 629 12543 1173 >20.0
b 554 25509 1664 21.64 +/- 0.23
u 299 549 246 18.93 +/- 0.13
w1 678 24073 1116 >20.6
w2 6741 6941 197 >19.8
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.01 in the direction of the burst
(Schlegel et al. 1998).