GCN Circular 11490
Subject
GRB 101224A: Swift/UVOT Upper Limits
Date
2010-12-24T17:38:45Z (13 years ago)
From
Wayne Landsman at GSFC/SSAI <wayne.b.landsman@nasa.gov>
W. Landsman (GSFC/Adnet) and H.A. Krimm (CRESST/NASA/USRA) report on
behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 101224A 83
s after the BAT trigger (Krimm et al., GCN Circ. 11484). No optical
afterglow consistent with the XRT position (Pagani et al., GCN Circ.
11488) is detected in the initial UVOT exposures. Preliminary 3-sigma
upper limits using 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 83 233 147 > 20.8
u_FC 296 546 246 > 19.6
white 83 7201 659 > 21.9
v 628 12647 1173 > 20.2
b 551 24555 1030 > 21.4
u 296 23977 1583 > 20.8
w1 677 30339 1644 > 20.8
m2 652 30016 2569 > 20.8
w2 601 11734 1179 > 20.7
The values quoted above are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.05 in the direction of the burst
(Schlegel et al. 1998).