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GCN Circular 33433

GRB 230217A: ATCA rapid-response radio detection
2023-03-09T07:49:56Z (a year ago)
Gemma Anderson at Curtin U <>
G. E. Anderson (Curtin), J. Stevens (CSIRO), M. E. Bell (UNewcastle), T. D. Russell (INAF),
P. J. Hancock (Curtin), J. C. A. Miller-Jones (Curtin), A. Bahramian (Curtin),
A. J. van der Horst (GWU), S. D. Ryder (Macquarie), A. Rowlinson (UvA, ASTRON),
R. A. M. J. Wijers (UvA)

The Australia Telescope Compact Array (ATCA) automatically triggered on
the Swift-BAT detection of the short GRB 230217A (Moss et al., GCN 33339)
at 5.5 and 9 GHz using the rapid-response mode under program C3204
(PI: Anderson). ATCA was on target observing GRB 230217A at 22:20:19.9 UT,
just 27 minutes post-burst (Moss et al., GCN 33339) and observed for 7 hours.
At the position of the proposed X-ray (Capalbi et al., GCN 33348, GCN 33365),
radio (Schroeder et al., GCN 33358) and optical (D���Avanzo et al., GCN 33374)
counterpart, we detected a source at both 5.5 GHz and 9 GHz with flux densities
of 170 +/- 30 and 150 +/- 20 microJy/beam, respectively.
Further observations have been taken.

We thank the ATCA and the CSIRO Space and Astronomy staff for supporting
and maintaining the ATCA rapid-response observing mode.
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