GCN Circular 23720
Subject
GRB 190114B: Swift/UVOT Upper Limits
Date
2019-01-15T16:53:38Z (5 years ago)
From
Mike Siegel at PSU/Swift MOC <mhs18@psu.edu>
M. H. Siegel (PSU) reports on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 190114B
158 s after the BAT trigger (Siegel et al., GCN Circ. 23686).
No optical afterglow consistent with the enhanced XRT position
(Goad et al. GCN Circ. 23691) or the position of the faint
optical counterpart (Fernandez-Garcia et al., GCN Circ. 23694;
Pozanenko et al., GCN Circ. 23696, Selsing et al. GCN Circ. 23713)
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
u_FC 158 408 246 >20.2
v 464 1976 175 >18.5
b 414 2075 214 >19.9
u 158 2050 568 >20.4
w1 513 2025 194 >19.7
m2 786 2000 117 >18.9
w2 440 2100 194 >19.8
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).