Skip to main content
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