GCN Circular 32454
Subject
GRB 220627A: MeerKAT radio observations
Event
Date
2022-08-10T16:47:21Z (4 years ago)
From
Stefano Giarratana at University of Bologna <s.giarratana@ira.inaf.it>
S. Giarratana (U. Bologna, INAF/IRA), J. Leung (U. Sydney, CSIRO),
Z. Wang (U. Sydney, CSIRO), T. An (SHAO), A. Deller (Swinburne),
G. Ghirlanda (INAF/Brera), M. Giroletti (INAF/IRA), D. L. Kaplan (UWM),
E. Lenc (CSIRO), T. Murphy (U. Sydney), L. Rhodes (U. Oxford),
O. S. Salafia (U. Milano-Bicocca, INAF/Brera), C. Spingola (INAF/IRA)
The MeerKAT radio telescope observed GRB 220627A (Fermi GBM team, GCN
32278;
Frederiks et al., GCN 32295; Suresh et al., GCN 32316) at a central
frequency
of 1.28 GHz, with a bandwidth of 0.78 GHz, over two epochs, starting at
18:44 UT on 2022 July 6 (8.9 days post-burst) and at 13:43 UT on 2022
August 2
(35.7 days post-burst). Each observation lasted 2 hours.
From our preliminary analysis, no source is detected with a >3 sigma
significance at a position consistent with previous detections
(de Wet et al., GCN 32289; Izzo et al., GCN 32291; Gropp et al., GCN
32296;
Nicuesa Guelbenzu et al., GCN 32304; Leung et al., GCN 32341).
The rms noise is approximately 9 and 14 uJy/beam, in the first and
second
epoch, respectively.
Further observations are planned.
We would like to thank the MeerKAT personnel for approving, executing,
and processing these observations.
The MeerKAT telescope is operated by the South African Radio Astronomy
Observatory, which is a facility of the National Research Foundation,
an agency of the Department of Science and Innovation.