GCN Circular 4943
Subject
GRB060331: Swift/UVOT upper limits
Date
2006-04-03T10:10:57Z (19 years ago)
From
Patricia Schady at MSSL/Swift <ps@mssl.ucl.ac.uk>
P. Schady (UCL-MSSL), on behalf of the Swift/UVOT team
The Swift/UVOT observed the field of HETE II transient H4043 (Fenimore et al.
GCN 4938) at two separate epochs starting at 16:53 UT and 18:29 UT. A 575s
coadded exposure from the first epoch of observations taken in white reveals no
new source in the field of view down to a 5-sigma magnitude upper limit of
19.9. In both epochs no source is detected in summed images from any of the
filters used down to the following 5-sigma upper limits.
1st Epoch
Filter Date Obs. Exp (s) 5sigUL(mag)
B 17:08:07 UT 885 20.3
U 16:52:56 UT 885 20.0
White 17:23:18 UT 575 19.9
2nd Epoch
Filter Date Obs. Exp (s) 5sigUL(mag)
B 18:59:13 UT 605 19.8
U 18:44:02 UT 885 20.0
UVW1 18:28:55 UT 886 19.4
where Date Obs. is the time of the beginning of the observations. These
magnitudes are not corrected for Galactic extinction; E(B-V)=0.148.