{
  "bibcode": "2006GCN..5871....1V",
  "body": "A.J. van der Horst, R.A.M.J. Wijers (University of Amsterdam) and E. Rol\n(University of Leicester) report on behalf of a larger collaboration:\n\n\"We observed the position of the GRB 061121 afterglow (GCN 5823) at\n2.3 GHz with the Westerbork Synthesis Radio Telescope, and at 4.8 and\n8.6 GHz with the Australia Telescope Compact Array.\nWe do not detect a radio counterpart of the optical afterglow (GCN 5824).\nOur results are given in the table below. We note that the three-sigma\nflux limit at 8.6 GHz at ~5.2 days after the burst is significantly\nlower than the VLA detection at ~0.8 days after the burst (GCN 5843).\n\nEpoch            Delta T   Frequency  3-sigma rms noise  Formal flux\n===============  ========  =========  =================  ==============\nNov 26.76-26.92  5.2 days  8.6 GHz    246 uJy/beam        10 +/- 82 uJy\nNov 26.76-26.92  5.2 days  4.8 GHz    210 uJy/beam        13 +/- 70 uJy\nNov 27.01-27.30  5.5 days  2.3 GHz    144 uJy/beam       -50 +/- 48 uJy\n\n\nWe would like to thank the WSRT staff for obtaining these observations\nin between VLBI observation runs. Also we would like to thank the staff\nof the Australia Telescope National Facility, in particular Philip\nEdwards, for obtaining these Target of Opportunity observations.\"",
  "circularId": 5871,
  "createdOn": 1164643108000,
  "email": "avdhorst@science.uva.nl",
  "subject": "GRB 061121: ATCA & WSRT Radio Observations",
  "submitter": "Alexander van der Horst at U of Amsterdam  <avdhorst@science.uva.nl>",
  "eventId": "GRB 061121"
}