GCN Circular 5427
Subject
VLA Upper Limit on Outburst of SGR 1806-20
Date
2006-08-09T13:14:36Z (18 years ago)
From
Jim Ulvestad at NRAO <julvesta@nrao.edu>
E. Fomalont, B. Clark, and J. Ulvestad report on behalf of NRAO:
We have used the NRAO Very Large Array in its B configuration on
behalf of the community for an observation of SGR 1806-20, the
apparent source of GRB 060806 (GCN 5416, Hurley et al. 2006; GCN
5419, Hurley et al. 2006). The observation epoch was 2006AUG09
at 03:15 UT. There was no significant detection of a new point
source at the nominal J2000 position of 18:08:39.4, -20:24:39.8
(Taylor et al. 2005, ApJL, 634, L93). The approximate 5-sigma
upper limits for a new point source are as follows:
1.42 GHz: < 2.0 mJy (limited by confusion)
8.46 GHz: < 0.3 mJy
22.46 GHz: < 1.7 mJy
The raw data will appear in the VLA archive at
http://www.nrao.edu/archive/ at approximately 0:00:00 UT on 2006AUG10,
and are freely available to the community for further processing and
analysis. An additional community observation is planned for
2006AUG10 to check for a later appearance of a new point source.
The National Radio Astronomy Observatory is a facility of the National
Science Foundation operated under cooperative agreement by Associated
Universities, Inc.
[GCN OPS NOTE(09aug06): This Circular was delayed 8 hours until the new
account could be added to the list.]