GCN Circular 16293
Subject
GRB 140516A: Swift/UVOT Upper Limits
Date
2014-05-17T12:23:23Z (10 years ago)
From
Paul Kuin at MSSL <npkuin@gmail.com>
N. P. M. Kuin (UCL-MSSL) and Bernardini (INAF-OAB) report on
behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 140516A
84 s after the BAT trigger (Bernardini et al., GCN Circ. 16285).
No optical afterglow consistent with the XRT enhanced position
(Osborne et al. GCN Circ. 16289) is detected in the initial UVOT
exposures. The Enhanced position overlaps with the PSF wings of
a star, and the light curve is consistent with a constant source.
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 84 234 147 >20.5
u_FC 298 547 246 >21.2
white 84 12686 1178 >20.6
v 627 7762 607 >19.5
b 553 12381 1294 >20.9
u 298 8313 770 >21.0
w1 676 8172 607 >21.6
m2 651 7967 529 >21.0
w2 602 7558 607 >21.1
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.02 in the direction of the burst
(Schlegel et al. 1998).