GCN Circular 17447
Subject
GRB 150211A: Swift/UVOT Upper Limits
Date
2015-02-12T02:35:34Z (10 years ago)
From
Margaret Chester at PSU <chester@swift.psu.edu>
M. M. Chester (Penn State) and R. L. C. Starling (U Leicester)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 150211A
2116 s after the BAT trigger (Starling et al., GCN Circ. 17434).
No optical afterglow consistent with the XRT position (Starling
GCN Circ. 17442) 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 2116 2266 147 >21.3
white 2116 3123 383 >21.8
v 2272 8220 255 >20.4
b 2371 2918 236 >20.1
u 2346 2713 58 >19.7
w1 2321 2688 58 >19.4
m2 8225 8421 193 >20.4
w2 3129 3243 112 >19.9
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).