GCN Circular 15615
Subject
GRB 131224A: Swift/UVOT Upper Limits
Date
2013-12-26T17:44:22Z (11 years ago)
From
Alice Breeveld at MSSL-UCL <a.breeveld@ucl.ac.uk>
A. A. Breeveld (UCL-MSSL) and M. De Pasquale (UCL-MSSL)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 131224A
10748 s after the INTEGRAL trigger (Mereghetti et al., GCN Circ. 15607).
The field is very crowded and no optical afterglow consistent with the
INTEGRAL position is detected in the initial UVOT exposures. Preliminary
3-sigma upper limits using the UVOT photometric system (Breeveld et al.
2011, AIP Conf. Proc. 1358, 373) for the initial exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
u 10748 18662 3918 >21.1
The magnitudes in the table are not corrected for the strong Galactic
extinction due to the reddening of E(B-V) = 0.96 in the direction of the
burst (Schlegel et al. 1998).