GCN Circular 19032
Subject
GRB160220A: Swift/UVOT observations
Date
2016-02-20T17:34:42Z (8 years ago)
From
Massimiliano de Pasquale at IASF-Palermo <m.depasquale@ucl.ac.uk>
M. De Pasquale (MSSL-UCL) and A. Lien (GSFC/UMBC) report
on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 160220A
4.11 ks after the BAT trigger (Lien et al., GCN Circ. 19023).
No optical afterglow consistent with the XRT position (Evans et al.
GCN Circ. 19025) is detected in the UVOT exposures.
Preliminary 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the
summed UVOT exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white 4110 5493 344 >20.6
v 4268 34517 903 >19.4
b 5088 5288 197 >19.7
u 4882 17290 424 >19.5
w1 4678 17052 1175 >20.3
m2 4472 11445 1271 >20.3
w2 5499 32840 1177 >20.5
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.13 in the direction of the burst
(Schlegel et al. 1998).