GCN Circular 5441
Subject
GRB051109B: Late-time Radio Observations
Event
Date
2006-08-12T19:23:53Z (19 years ago)
From
Alicia Soderberg at Caltech <ams@astro.caltech.edu>
A. M. Soderberg (Caltech), D. A. Frail (NRAO) and P. Chandra (UVA/NRAO)
report on behalf of the Caltech-NRAO-Carnegie GRB Collaboration:
"We re-observed the field of GRB 051109B (GCN 4222) centered on the
revised XRT position (GCN 5387) using the VLA on August 9.5 UT 2006 (t~9
months after the burst) at a frequency of 1.43 GHz. Comparison with our
previous VLA observations (GCN 4245) reveals no new sources within the
revised XRT error circle. We place a 3-sigma limit of 0.21 mJy.
Adopting a redshift of z=0.08 for the putative host galaxy (GCN 5387),
this limit corresponds to a radio luminosity 100 times fainter than that
observed for GRB 030329 at a comparable epoch (Frail et al. 2003, ApJ,
619, 944).
The National Radio Astronomy Observatory is a facility of the National
Science Foundation operated under cooperative agreement by Associated
Universities, Inc."