GCN Circular 4567
Subject
GRB 060121: Swift/UVOT upper limits
Date
2006-01-23T17:00:25Z (18 years ago)
From
Alice Breeveld at MSSL-UCL <aad@mssl.ucl.ac.uk>
A. A. Breeveld (UCL-MSSL), L. Angelini (GSFC), D. Hinshaw (GSFC-SPSYS),
M. Carter (UCL-MSSL), N. Gehrels (GSFC) on behalf of the Swift/UVOT
team
The Swift UVOT instrument began observing the HETE-discovered GRB
050121 (Arimoto et al., GCN 4550; Prigozhin et al., GCN 4551) as a
target of opportunity at 01:21:28 UT on 22 January 2006 10.6 ks after
the burst. No new source is found at the XRT position (Mangano et al.,
GCN 4565) in coadded images from the first ToO observation, with any of
the filters used down to the following 5-sigma magnitude upper limits.
No exposures were taken in UVW1 or UVM2. These values are not corrected
for Galactic extinction.
Filter T_range(s) Exp(s) 5sigUL(mag)
B 10593-16768 1099 20.6
V 11917-12639 712 19.4
U 21650-22022 368 19.7
UVW2 11003-18423 1625 21.2
White 10798-17682 1099 20.7