GCN Circular 12610
Subject
GRB 111201A: Swift/UVOT Upper Limits
Event
Date
2011-12-02T14:45:05Z (14 years ago)
From
Paul Kuin at MSSL <npkuin@gmail.com>
N.P.M. Kuin (MSSL/UCL) and T. Sakamoto (GSFC/UMBC)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 111201A
26513 s after the BAT trigger (Sakamoto et al., GCN Circ. 12608).
No optical afterglow consistent with the XRT position (Kennea and
Sakamoto, GCN Circ. 12609) 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 initial
exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white 26513 32667 2746 >22.6
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)