GCN Circular 27108
Subject
GRB 200216B: Swift/UVOT Upper Limits
Event
Date
2020-02-16T22:15:58Z (6 years ago)
From
Paul Kuin at MSSL <npkuin@gmail.com>
N. P. M. Kuin (UCL-MSSL) and P. D'Avanzo (INAF-OAB) report on
behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 200216B
124 s after the BAT trigger (D'Avanzo et al., GCN Circ. 27102). No optical
afterglow consistent with the XRT position (Goad et al. GCN Circ. 27106)
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
white_FC 124 274 147 >21.0
white 124 1535 334 >21.5
w1 1095 1635 39 >20.2
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).