{
  "bibcode": "2019GCN.25621....1D",
  "body": "Dougal Dobie (University of Sydney/CSIRO), Emil Lenc (CSIRO),\nIan Brown (UWM), Tara Murphy (University of Sydney), Adam Stewart\n(University of Sydney), David Kaplan (UWM), Kunal Mooley (Caltech),\nGregg Hallinan (Caltech) and the OzGrav, JAGWAR and GROWTH collaborations.\n\nWe observed ASKAP J005547.4-270433/AT2019osy (GCN 25487) with the\nAustralia Telescope Compact Array (ATCA) on 2019 August 29\nfrom 14:00-22:00 UT.\n\nWe report flux densities of:\n\n  369+/-23 uJy at 5.0 GHz\n  335+/-19 uJy at 6.0 GHz\n  307+/-15 uJy at 8.5 GHz\n  278+/-14 uJy at 9.5 GHz\n\nFitting a power-law to these values we find a spectral index of\nalpha=-0.39+/-0.11, consistent with the value of -0.42 found by\nMooley et al. (GCN 25539).\n\nComparing to the VLA observations reported by Mooley et al. (GCN 25539),\nwe find that the flux density has increased by ~40% in 1.5 days across\n4.5-10 GHz.\n\nAdditional epochs are required to separate intrinsic variability from\ncontamination from propagation effects and systematics due to differing\nspatial resolution between the ATCA, VLA and ASKAP.\n\nThank you to CSIRO staff for supporting these observations.",
  "circularId": 25621,
  "createdOn": 1567473602000,
  "email": "ddobie94@gmail.com",
  "subject": "LIGO/Virgo S190814bv: ATCA observation of ASKAP J005547-270433/AT2019osy",
  "submitter": "Dougal Dobie at VAST  <ddobie94@gmail.com>",
  "eventId": "LIGO/Virgo S190814bv"
}