GCN Circular 32341
Subject
GRB 220627A: ATCA detection of radio counterpart
Date
2022-07-07T14:26:05Z (2 years ago)
From
James Leung at U of Sydney/VAST <jleu9465@uni.sydney.edu.au>
James Leung (U. Sydney, CSIRO), Ziteng Wang (U. Sydney, CSIRO), Tao
An (SHAO), Adam Deller (Swinburne), Giancarlo Ghirlanda (INAF/Brera),
Stefano Giarratana (U. Bologna, INAF/IRA), Marcello Giroletti
(INAF/IRA), David L. Kaplan (UWM), Emil Lenc (CSIRO), Tara Murphy
(U. Sydney), Lauren Rhodes (U. Oxford), Om Sharan Salafia
(U. Milano-Bicocca, INAF/Brera), Cristiana Spingola (INAF/IRA)
The Australia Telescope Compact Array (ATCA) observed GRB 220627A
(Fermi GBM team, GCN Circ. 32278) at multiple frequencies starting at
04:00 UT on 2022 July 5 (7.3 days post-burst). We detected a radio
source with a preliminary flux density of ~0.4 mJy at a central
frequency of 17 GHz at
RA = 13:25:28.48
Dec = -32:25:32.14
with positional uncertainty of ~1.5 arcsec. The position of the radio
source is consistent with the candidate optical (de Wet et al., GCN
Circ. 32289) and X-ray afterglow (Gropp et al., GCN Circ. 32296)
positions.
Further observations with several facilities at different frequencies
are ongoing.
We thank CSIRO staff for rapidly scheduling and supporting these
observations.