GCN Circular 20682
Subject
GRB 170214A: Swift/UVOT Upper Limits
Date
2017-02-16T07:17:01Z (7 years ago)
From
Alice Breeveld at MSSL-UCL <a.breeveld@ucl.ac.uk>
A. A. Breeveld (UCL-MSSL) and A.P. Beardmore (U. Leicester)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 170214A
38603 s after the LAT trigger (Mailyan and Meegan, GCN Circ. 20675).
No optical afterglow consistent with the XRT���s source 1 position
(Beardmore et al., GCN Circ. 20679, Troja et al., GCN Circ. 20681)
is detected in the initial UVOT exposures. The source 3 position is just
off the edge of the field of view.
Preliminary 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for source 1 in the
initial exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
w1 38603 65287 4856 >21.0
The magnitude in the table is not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.36 in the direction of the burst
(Schlegel et al. 1998).