GCN Circular 27090
Subject
GRB 200215A: Swift/UVOT Upper Limits
Date
2020-02-16T01:29:30Z (4 years ago)
From
Paul Kuin at MSSL <npkuin@gmail.com>
N. P. M. Kuin (UCL-MSSL) and M. G. Bernardini (INAF-OAB)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 200215A
90 s after the BAT trigger (Bernardini et al., GCN Circ. 27079).
No optical afterglow consistent with the XRT position (Evans et al. GCN
Circ. 27089) 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 90 240 147 >20.0
u_FC 302 552 246 >20.0
white 90 7290 581 >21.2
v 634 5070 294 >18.5
b 559 7092 294 >19.8
u 302 6885 481 >20.3
w1 1087 6680 216 >19.2
w2 10534 11091 547 >19.8
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.15 in the direction of the burst
(Schlegel et al. 1998).