GCN Circular 19756
Subject
GRB 160801A: Swift/UVOT Upper Limits
Date
2016-08-02T20:48:04Z (9 years ago)
From
Mike Siegel at PSU/Swift MOC <siegel@swift.psu.edu>
B. G. Balzer (PSU) and V. D'Elia (ASDC)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 160801A
90 s after the BAT trigger (D'Elia et al., GCN Circ. 19744).
No optical afterglow consistent with the XRT position
(Goad et al. GCN Circ. 19746)
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 the subsequent summed exposures:
Filter T_start(s) T_stop(s) Exp(s) Mag
white_FC 90 240 147 >20.50
u_FC 302 552 245 >19.91
white 581 1896 283 >20.94
v 631 1945 155 >18.91
b 557 1871 136 >19.90
u 704 1846 116 >19.48
w1 1455 1474 19 >17.77
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).