GCN Circular 22733
Subject
GRB 180514A: Swift/UVOT Upper Limits
Date
2018-05-15T06:58:41Z (7 years ago)
From
Alice Breeveld at MSSL-UCL <a.breeveld@ucl.ac.uk>
A. A. Breeveld (UCL-MSSL) and S. J. LaPorte (PSU) report on behalf of
the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 180514A 87
s after the BAT trigger (LaPorte et al., GCN Circ. 22723).
No optical afterglow consistent with the enhanced XRT position (Goad et
al. GCN Circ. 22725) 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 >20.8
u_FC 300 549 246 >20.2
white 87 7353 688 >22.8
v 6129 6329 197 >20.1
b 5513 7148 393 >20.7
u 300 6943 639 >21.6
w1 5104 6739 393 >20.8
m2 6334 6533 197 >20.1
w2 5924 7540 374 >20.3
The magnitudes in the table are not corrected for the Galactic
extinction due to the reddening of E(B-V) = 0.01 in the direction of the
burst (Schlegel et al. 1998).