GCN Circular 21099
Subject
GRB 170516A: Swift/UVOT Upper Limits
Date
2017-05-16T22:02:21Z (7 years ago)
From
Paul Kuin at MSSL <npkuin@gmail.com>
N. P. M. Kuin (UCL-MSSL) and A. Y. Lien (GSFC/UMBC) report
on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field
of GRB 170516A 87 s after the BAT trigger (Lien et al., GCN Circ.
21097). No optical afterglow consistent with the XRT position
(Lien et al. GCN Circ. 21097) 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 87 237 147 >20.1
white 87 5703 541 >21.1
v 4478 6113 393 >19.8
b 3863 5498 393 >20.6
u 299 5293 379 >19.4
w1 4888 5088 197 >19.4
m2 4683 6222 299 >20.5
w2 4274 5909 393 >20.5
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).