TITLE:   GCN CIRCULAR
NUMBER:  35801
SUBJECT: GRB 240222A: ATCA radio observations
DATE:    24/02/26 17:22:04 GMT
FROM:    jamesk.leung@utoronto.ca

J. K. Leung (U. Toronto/HUJI), G. E. Anderson (Curtin University),
S. Chastain (UNM), A. Gulati (U. Sydney), L. Rhodes (U. Oxford),
A. J. van der Horst (GWU) on behalf of the PanRadio GRB collaboration

The Australia Telescope Compact Array (ATCA) performed observations
of GRB 240222A (Fermi GBM Team, GCN 35769; D'Avanzo et al., GCN 35770)
at 5.5, 9, 16.7 and 21.2 GHz as part of the Large ATCA "PanRadio GRB"
follow-up programme C3542 (PI. Anderson). ATCA observed from
2024-02-24 12:00 UT to 22:00 UT. In our preliminary analysis, we find
no radio source coincident with the refined XRT position (Beardmore
et al., GCN 35780) with 3 sigma upper limits of 75, 54, 69 and 159
microJy/beam at 5.5, 9.0, 16.7 and 21.2 GHz, respectively.

We thank the CSIRO Space and Astronomy staff for supporting these
observations. We acknowledge the Gomeroi people as the traditional
owners of the Observatory site. The Australia Telescope Compact Array is
part of the Australia Telescope National Facility
(https://ror.org/05qajvd42) which is funded by the Australian Government
for operation as a National Facility managed by CSIRO.