GCN Circular 14544
Subject
GRB 130502B: Swift/UVOT Upper Limits
Date
2013-05-03T15:09:16Z (11 years ago)
From
Alice Breeveld at MSSL-UCL <a.breeveld@ucl.ac.uk>
A. A. Breeveld (MSSL-UCL) and S. Immler (NASA/CRESST/GSFC)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 130502B
55101 s after the LAT trigger (Kocevski et al., GCN Circ. 14532). No
optical afterglow consistent with the refined XRT position (Melandri et
al., GCN Circ. 14540) is detected in the 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
white_FC 55101 55208 105 >20.3
white 55101 89746 4493 >22.1
The magnitudes in the table are not corrected for the Galactic
extinction due to the reddening of E(B-V) = 0.21 in the direction of the
burst (Schlegel et al. 1998).