TITLE:   GCN CIRCULAR
NUMBER:  35155
SUBJECT: GRB 231118A: ATCA detection of radio counterpart
DATE:    23/11/22 09:09:53 GMT
FROM:    Gemma Anderson at Curtin U <gemma.anderson@curtin.edu.au>

S. Chastain (UNM),  G. E. Anderson (Curtin), J. K. Leung (UofT/HUJI), S. D. Ryder (Macquarie), A. J. van der Horst (GWU), A. Gulati (USyd), and L. Rhodes (Oxford) on behalf of the ATCA PanRadio GRB collaboration

The Australia Telescope Compact Array (ATCA) observed the long GRB 231118A, first detected by the Fermi GRB Team (GCN 35100), as part of the ATCA "PanRadio GRB" Large Project C3542 (PI: G. Anderson) on 2023-11-20 at 14:30 UT for 3 hours (~2 days post-burst).

We detect a radio source with a flux density of ~0.4 mJy at 9 GHz. This source is consistent with the reported Swift/XRT enhanced position (Evans et al., GCN 35106).

Further observations are planned.

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.