{
  "bibcode": "2022GCN.32766....1L",
  "body": "James Leung (University of Sydney/CSIRO), Tara Murphy (University of \nSydney), Emil Lenc (CSIRO), Gemma Anderson (Curtin)\n\nWe report the radio spectrum for the Australia Compact Telescope Array \n(ATCA) observations (Bhandari et al., GCN 32763) taken on 2022 October\n15 from 05:00 to 11:30 UTC (5.6 to 5.9d after the Swift/BAT trigger).\n\nATCA observed at 16.7, 21.2, 33, 35, 45 and 47 GHz. In our preliminary\nanalysis, we detect the radio counterpart at each frequency (Trushkin \net al., ATel 15671; Bright et al., GCN 32653; Farah et al., GCN 32655; \nde Ugarte Postigo et al., GCN 32676; Rhodes et al., GCN 32700; Leung\net al., GCN 32836; Laskar et al., GCN 32740; Laskar et al., GCN 32757;\nUrata et al., GCN 32761; Bhandari et al., GCN 32763) at a position \nconsistent with the Swift/UVOT position (Dichiara et al., GCN 32632). \n\nThe preliminary flux density measurements are reported below, with \nuncertainties being purely statistical:\n\n7.1 +/- 0.1 mJy/beam at 16.7 GHz\n6.1 +/- 0.1 mJy/beam at 21.2 GHz\n4.8 +/- 0.1 mJy/beam at 33 GHz\n4.4 +/- 0.1 mJy/beam at 35 GHz\n3.6 +/- 0.2 mJy/beam at 45 GHz\n3.5 +/- 0.2 mJy/beam at 47 GHz\n\nOngoing observations are planned. \n\nWe thank CSIRO staff for rapidly scheduling, supporting and executing\nthese observations.\n\nThe Australia Telescope Compact Array is part of the Australia Telescope\nNational Facility which is funded by the Australian Government for\noperation as a National Facility managed by CSIRO. We acknowledge the\nGomeroi people as the traditional owners of the Observatory site.",
  "circularId": 32766,
  "createdOn": 1665875743000,
  "email": "jleu9465@uni.sydney.edu.au",
  "subject": "GRB 221009A: ATCA radio spectrum",
  "submitter": "James Leung at U of Sydney/VAST  <jleu9465@uni.sydney.edu.au>",
  "eventId": "GRB 221009A"
}