GCN Circular 16549
Subject
GRB 140709A: Swift/UVOT Upper Limits
Date
2014-07-09T11:53:44Z (10 years ago)
From
Paul Kuin at MSSL <npkuin@gmail.com>
N. P. M. Kuin (UCL-MSSL) and L. M. Z. Hagen (PSU)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 140709A
93 s after the BAT trigger (Hagen et al., GCN Circ. 16546). No optical
afterglow consistent with the XRT position (Evans et al. GCN Circ. 16548)
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 93 242 147 >21.0
white 93 2199 186 >21.3
v 2055 5878 216 >19.8
b 1979 12414 848 >21.8
u 305 6434 330 >20.5
w1 2104 6288 216 >20.2
m2 5883 6083 197 >19.9
w2 2030 2050 19 >19.7
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.40 in the direction of the burst
(Schlegel et al. 1998).