GCN 44133: GRB 260307B: ATCA Radio Upper Limits

S. I. Chastain (TTU), G. E. Anderson (CSIRO), S. Ryder (Macquarie), A. Gulati (USyd), A. J. van der Horst (GWU), J. K. Leung (UofT/HUJI), and L. Rhodes (TSI/McGill) on behalf of the ATCA PanRadio GRB collaboration:

We observed the long GRB 260307B detected by SVOM (SVOM Team, GCN 43940) with the Australia Telescope Compact Array (ATCA) 0.9, 4.8, and 11 days post-burst.

No radio source was detected within the SVOM MXT localization (SVOM Team, GRB43940). At 8 GHz we find 3-sigma upper limits of 36, 33, and 30 microJy/beam, at 0.9, 4.8, and 11 days post-burst 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.