GCN Circular 12488
Subject
GRB 111022B: Swift/UVOT upper limits
Date
2011-10-23T21:29:31Z (13 years ago)
From
Paul Kuin at MSSL <npkuin@gmail.com>
N. P. M. Kuin (MSSL-UCL) and S. T. Holland (CRESST/USRA/GSFC)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 111022B
145 s after the BAT trigger (Holland et al., GCN Circ. 12472).
The upper limit of detection was determined at the enhanced XRT position
(Beardmore et al., GCN 12478).
Preliminary 3-sigma upper limits in the UVOT photometric system (
Poole et al. 2008, MNRAS, 383, 627) for the first finding
chart (FC) exposure and subsequent exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white_FC 145 294 147 >20.8
u_FC 303 552 246 >20.0
v 635 6091 452 >19.8
b 559 6912 452 >20.3
u 302 6707 678 >20.4
uvw1 685 6501 432 >20.3
uvm2 659 6296 452 >20.3
uvw2 608 5886 255 >20.1
white 145 6975 606 >21.3
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.07 in the direction of the burst
(Schlegel et al. 1998).