GCN Circular 5523
Subject
GRB060904A: Swift/UVOT optical observations
Date
2006-09-04T19:26:56Z (18 years ago)
From
Samantha Oates at MSSL <sro@mssl.ucl.ac.uk>
S.R. Oates (UCL-MSSL), D. Grupe (PSU) report on behalf of the
Swift/UVOT team:
The Swift/UVOT began observing the field of GRB 060904A at
01:04:36 on 2006-09-04, 75 s after the BAT trigger (Grupe
et al., GCN 5502). No new source was detected within the XRT error
circle
in coadded images in any filter down to the following 3-sigma
magnitude upper limits:
Filter Tstart Tstop Exposure 3-sigma UL
-------------------------------------------------
V 55 1888 1680 20.11
B 658 1984 97 19.85
U 634 1959 117 19.49
UVW1 610 1936 117 19.91
UVM2 586 1911 117 19.95
UVW2 687 2014 128 20.55
White 75 1997 352.2 21.69
------------------------------------------------
These upper limits are not corrected for Galactic extinction
E(B-V) = 0.018.