GCN Circular 14543
Subject
GRB 130502A: Swift/UVOT Upper Limits
Date
2013-05-03T15:08:05Z (11 years ago)
From
Alice Breeveld at MSSL-UCL <a.breeveld@ucl.ac.uk>
A. A. Breeveld (MSSL-UCL) and E. Troja (NASA/GSFC/UMCP) report on behalf
of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 130502A 96
s after the BAT trigger (Troja et al., GCN Circ. 14527).
An optical afterglow consistent with the position of the TNG candidate
(Malesani et al. GCN Circ. 14531) is detected in the initial white
exposure. Preliminary magnitude and 3-sigma upper limits using the UVOT
photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for
the first white finding chart (FC) exposure and subsequent exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white_FC 96 246 147 20.90 � 0.3
white 588 608 20 >20.06
u 309 559 246 >20.6
b 564 584 20 >19.25
v 5288 5488 197 >19.81
uvw1 5698 5898 197 >20.16
uvm2 5492 5692 197 >19.96
The magnitudes in the table are not corrected for the Galactic
extinction due to the reddening of E(B-V) = 0.03 in the direction of the
burst (Schlegel et al. 1998).