{
  "bibcode": "2019GCN.25806....1I",
  "body": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\nOn 19/09/22 at 23:03:55.56 UT IceCube detected a track-like event with a high probability of being of astrophysical origin. The event was selected by the ICECUBE_Astrotrack_GOLD alert stream.  The threshold astrophysical neutrino purity for Gold alerts is 50%. This alert has an estimated false alarm rate of 1.33 events per year due to atmospheric \nbackgrounds. The IceCube detector was in a normal operating state at the time of detection.\n\nAfter the initial automated alert (https://gcn.gsfc.nasa.gov/notices_amon_g_b/133092_52499868.amon), more  \nsophisticated reconstruction algorithms have been applied offline, with the direction refined to:\n\nDate: 19/09/22\nTime:  23:03:55.56 UT\nRA: 5.76 (+ 1.19 - 1.37 deg  90% PSF containment) J2000\nDec: -1.57(+ 0.93 - 0.82 deg 90% PSF containment) J2000\n\nWe encourage follow-up by ground and space-based instruments to help identify a possible astrophysical source for the candidate neutrino.\n\nThere are no Fermi 4FGL or 3FHL catalog sources in the 90% uncertainty region. The nearest gamma-ray source in either catalog is 4FGL \nJ0022.0+0006 at RA: 5.52 deg, Dec: 0.11 deg (1.70 deg away from the best-fit event position).\n\nThe IceCube Neutrino Observatory is a cubic-kilometer neutrino detector operating at the geographic South Pole, Antarctica. The IceCube realtime \nalert point of contact can be reached at roc@icecube.wisc.edu",
  "circularId": 25806,
  "createdOn": 1569203913000,
  "email": "blaufuss@umd.edu",
  "subject": "IceCube-190922B - IceCube observation of a high-energy neutrino candidate event",
  "submitter": "Erik Blaufuss at U. Maryland/IceCube  <blaufuss@umd.edu>",
  "eventId": "IceCube-190922B"
}