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GCN Circular 35397

GRB 231215A: AMI-LA radio detection
2023-12-18T15:27:07Z (6 months ago)
Lauren Rhodes at Oxford <>
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Lauren Rhodes, Rob Fender (Oxford), Dave Green, Dave Titterington (Cambridge) report:
We observed the field of the afterglow candidate GRB 231215A (GCN 35343) with the Arcminute Microkelvin Imager Large-Array (AMI-LA) at 15.5 GHz beginning at UT 19:57:45 on 17-Dec-2023 for a total of 4 hours. The flux standard 3c286 was used to calibrate the bandpass response and flux scale of the AMI-LA and J0102+5824 was used as an interleaved complex gain calibrator.

We detect an unresolved radio source at the position of the afterglow candidate as reported in GCN 35345 with a flux density of ~220uJy/beam. 

Further observations are planned. We thank the staff at the Mullard Radio Astronomy Observatory for carrying out these observations and operating the AMI-LA.
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