GCN Circular 12693
Subject
GRB 111215A: Swift/UVOT Upper Limits
Date
2011-12-16T11:29:50Z (12 years ago)
From
Samantha Oates at MSSL <sro@mssl.ucl.ac.uk>
S. R. Oates (MSSL-UCL) reports on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 111215A
426 s after the BAT trigger (Oates et al., GCN Circ. 12681).
No optical afterglow consistent with the XRT position
(Beardmore et al., GCN Circ. 12690) 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 426 576 147 >21.7
white 426 19036 645 >22.0
v 732 13257 608 >20.1
b 657 18972 1198 >21.6
u 632 6983 313 >20.7
w1 608 22616 593 >20.6
m2 583 6572 313 >20.7
w2 708 12928 1260 >21.3
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.06 in the direction of the burst
(Schlegel et al. 1998).