GCN Circular 15118
Subject
GRB 130822A: Swift/UVOT Upper Limits
Date
2013-08-23T09:44:03Z (11 years ago)
From
Alice Breeveld at MSSL-UCL <a.breeveld@ucl.ac.uk>
A. A. Breeveld (UCL-MSSL) and D. Kocevski (NASA/GSFC/ORAU) report on
behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 130822A 81
s after the BAT trigger (Kocevski et al., GCN Circ. 15112).
No optical afterglow consistent with the XRT position (Beardmore et al.
GCN Circ. 15117) 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 first finding
chart (FC) exposure and subsequent exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white_FC 81 231 147 >20.8
u_FC 295 544 246 >20.7
white 81 1543 392 >21.4
v 624 1420 97 >19.3
b 550 1170 58 >20.1
u 295 1145 265 >20.9
w1 674 1470 97 >19.7
w2 600 620 19 >19.4
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).