Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 3308

GRB050421: Radio Observations
2005-04-21T17:49:52Z (19 years ago)
Alicia Soderberg at Caltech <>
A. M. Soderberg (Caltech) and D. A. Frail (NRAO) report on behalf of
the Caltech-NRAO-Carnegie GRB Collaboration:

"We observed the field centered on the BAT position of the Swift burst
GRB 050421 (GCN#3296) using the VLA at a frequency of 8.46 GHz
on Apr 21.62 UT (t ~ 0.4 days after the burst).
We do not detect any radio sources within the XRT error circle (GCN#3301).
We place a 2-sigma detection limit of 34 uJy on the field."
Looking for U.S. government information and services? Visit