GCN Circular 13702
Subject
GRB 120819A: Swift/UVOT Upper Limits
Date
2012-08-29T21:35:17Z (12 years ago)
From
Frank Marshall at GSFC <femarsha@khamseen.gsfc.nasa.gov>
F. E. Marshall (NASA/GSFC) and A. P. Beardmore (U. Leicester)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 120819A
158 s after the BAT trigger (Beardmore et al., GCN Circ. 13681).
No optical afterglow consistent with the optical position
(Malesani et al. GCN Circ. 13683)
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 158 308 147 >21.1
white 158 5439 541 >21.7
v 4214 22619 1278 >20.9
b 3598 11864 1164 >21.1
u 4829 17638 1858 >21.6
w1 4625 16836 1998 >21.4
m2 4418 22980 1629 >21.7
w2 4009 21706 1279 >21.8
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.17 in the direction of the burst
(Schlegel et al. 1998).