GCN Circular 23894
Subject
GRB 190211A: Swift/UVOT Detection
Date
2019-02-12T18:05:47Z (5 years ago)
From
Frank Marshall at Swift/UVOT <marshall@milkyway.gsfc.nasa.gov>
F. E. Marshall (NASA/GSFC) reports on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 190211A
203 s after the BAT trigger (Marshall et al., GCN Circ. 23883).
A source consistent with the optical position
(Xu et al. GCN Circ. 23884) and just outside the
90% confidence XRT position (Evans et al. GCN Circ. 23888)
is detected in the only UVOT exposure.
The preliminary UVOT position is:
RA (J2000) = 13:06:38.45 = 196.66019 (deg.)
Dec (J2000) = +41:58:04.9 = 41.96803 (deg.)
with an estimated uncertainty of 0.53 arc sec. (radius, 90% confidence).
The preliminary detection using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early
exposures is:
Filter T_start(s) T_stop(s) Exp(s) Mag
white 203 351 146 19.73 +/- 0.11
The magnitude in the table is 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).