GCN Circular 10901
Subject
GRB 100628A: Swift/UVOT Upper Limits
Event
Date
2010-06-28T22:48:13Z (16 years ago)
From
Stefan Immler at NASA/GSFC <stefan.m.immler@nasa.gov>
S. Immler (CRESST/GSFC/UMD) reports on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 100628A
90 s after the BAT trigger (Immler et al., GCN Circ. 10895). No optical
afterglow consistent with the XRT position (Starling et al., GCN Circ.
10899) 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 90 239 147 >20.2
u_FC 302 551 246 >19.4
white 90 11409 1498 >21.4
v 631 12968 1099 >19.5
b 557 7133 471 >20.1
u 302 6928 697 >20.2
w1 680 6722 471 >19.6
m2 4882 6517 393 >19.3
w2 607 12315 1176 >20.3
The values quoted above are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.17 in the direction of the burst
(Schlegel et al. 1998).