GCN Circular 4263
Subject
GRB051111: Swift/UVOT Observations
Date
2005-11-11T16:51:52Z (18 years ago)
From
Tracey Poole at MSSL <tsp@mssl.ucl.ac.uk>
T.S. Poole (UCL-MSSL), T. Sakamoto (GSFC), A.J. Blustin (UCL-MSSL), B.
Hancock (UCL-MSSL) & T.Kennedy (UCL-MSSL) on behalf of the Swift/UVOT team
report:
The Swift-Ultra-Violet/Optical Telescope (UVOT) began observing the field
of GRB 051111 (BAT Trigger=163438; Sakamoto et al. GCN 4248) at 2005-11-11
7:47:20, 5560 seconds after the burst. We detect a source in the V, B, U
and UVW1 filters at position RA 23:12:33.17, DEC 18:22:28.80; this
position was also reported by Mundell et. al. (GCN 4250). The source is
not detected in the UVM2 or UVW2 filters.
The aperture used for optical observations was 6 arcsec, and 12 arcsec was
used for the ultraviolet observations. The limiting magnitudes are given
to a 3 sigma limit.
Filter T_range T_exp Mag
(sec) (sec)
V 16298-17198 900 19.33+/-0.35 - source detection
B 11237-12136 900 20.38+/-0.35 - source detection
U 10329-11229 900 20.09+/-0.46 - source detection
UVW1 6467-7153 686 20.25+/-0.85 - source detection
UVM2 5560-11832 1800 20.92 - upper limit
UVW2 12145-12938 793 20.64 - upper limit
Where T_range is time post-trigger, and T_exp is the exposure time of the
observation. Magnitude errors include statistical and systematic errors.
These results were obtained from intital UVOT exposures, and the
observations of GRB051111 are continuing.
This message may be cited.