GCN Circular 26277
Subject
GRB 191122A: Swift/UVOT Upper Limits
Date
2019-11-23T01:05:16Z (4 years ago)
From
Paul Kuin at MSSL <npkuin@gmail.com>
N. P. M. Kuin (UCL-MSSL) and B. Sbarufatti (PSU)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 191122A
104 s after the BAT trigger (Sbarufatti et al., GCN Circ. 26269).
No optical afterglow consistent with the XRT position
(Evans GCN Circ. 26270,26272)
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 104 253 147 >21.1
u_FC 316 566 246 >20.4
white 104 11801 1305 >22.0
v 647 6097 432 >20.2
b 572 10938 1121 >21.9
u 316 6696 642 >20.5
w1 696 6508 413 >20.1
m2 846 6303 413 >21.2
w2 797 5893 413 >20.1
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.01 in the direction of the burst
(Schlegel et al. 1998).