GCN Circular 16622
Subject
GRB 140709B: Swift/UVOT Upper Limits
Event
Date
2014-07-23T11:23:28Z (11 years ago)
From
Craig Swenson at PSU/Swift <cswenson@astro.psu.edu>
C. A. Swenson (PSU) reports on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 140709B
97 s after the BAT trigger (Swenson et al., GCN Circ. 16551).
No optical afterglow consistent with the XRT position
(Goad et al. GCN Circ. 16556)
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 4835 4985 147 >20.8
u_FC 97 346 246 >20.6
white 4835 6626 541 >21.7
v 633 7037 491 >20.5
b 352 6422 534 >20.9
u 97 6216 668 >21.2
w1 683 11259 922 >20.8
m2 1087 7230 440 >21.2
w2 758 6832 471 >20.6
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.04 in the direction of the burst
(Schlegel et al. 1998).