GCN Circular 4303
Subject
GRB051117b: No Swift/UVOT Detection
Date
2005-11-24T15:11:02Z (18 years ago)
From
Tracey Poole at MSSL <tsp@mssl.ucl.ac.uk>
T. S. Poole (UCL-MSSL), S. T. Holland (GSFC), D. Band (GSFC),
P. Boyd (GSFC-UMBC) & J. Nousek (PSU) on behalf of the Swift/UVOT team
report:
The Swift-Ultra-Violet/Optical Telescope (UVOT) began observing the
field of GRB 051117b (BAT Trigger=164279; Band et. al. GCN 4281) at
2005-11-17 13:22:54 UT, 133 seconds after the burst.
No new source is detected within the 4 arcsec radius XRT error circle at
position RA=5h 40m 43s, Dec=-19d 16' 26.2" (Beardmore et. al. GCN 4282)
in any of the UVOT filters down to the following co-added 5 sigma
magnitude upper limits:
Filter T_range (sec) Exp (sec) 5-sigma
V 133-24975 5236 20.53
B 499-1608 199 19.59
U 445-7019 311 19.66
UVW1 391-366901 1099 21.00
UVM2 277-5993 1110 21.08
UVW2 608-1713 2340 23.24
WHITE 553-982 100 19.49
Where T_range is time post-trigger, and T_exp is the exposure time of
the observation. A 6 arcsec aperture was used for all filters.
These values are not corrected for Galactic extinction.
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