GCN Circular 20130
Subject
GRB 161104A: Swift/UVOT Upper Limits
Date
2016-11-05T03:28:35Z (8 years ago)
From
Mike Siegel at PSU/Swift MOC <siegel@swift.psu.edu>
M. H. Siegel (PSU) and B. Mingo (U. Leicester)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 161104A
69 s after the BAT trigger (Mingo et al., GCN Circ. 20123).
No optical afterglow consistent with the XRT position
(Goad et al. GCN Circ. 20124)
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 initial exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white 69 170 99 >20.8
w1 4984 5184 197 >19.9
m2 4779 4979 197 >21.7
w2 5805 6005 197 >19.9
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).