{
  "bibcode": "2020GCN.28715....1I",
  "body": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\nOn 20/10/21 at 06:37:47.48 UT IceCube detected a track-like event with a moderate probability of being of astrophysical origin. The event was selected by the ICECUBE_Astrotrack_Bronze alert stream. The average astrophysical neutrino purity for Bronze alerts is 30%. This alert has an estimated false alarm rate of 2.987 events per year due to atmospheric backgrounds. 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/134621_31008065.amon), more \nsophisticated reconstruction algorithms have been applied offline, with the direction refined to:\n\nDate: 20/10/21\nTime: 06:37:47.48  UT\nRA: 260.82 (+ 1.73 - 1.68  deg 90% PSF containment) J2000\nDec: 14.55 (+ 1.35 - 0.74  deg 90% PSF containment) J2000 \n\nWe encourage follow-up by ground and space-based instruments to help identify a possible \nastrophysical source for the candidate neutrino.\n\nThere are no Fermi-LAT 4FGL or 3FHL sources inside the 90% localization region. The closest source is 4FGL J1728.0+1216 located at RA 262.02 deg and Dec 12.28 deg (J2000), at a distance of 2.56 degrees from the best-fit location.\n\nThe IceCube Neutrino Observatory is a cubic-kilometer neutrino detector operating at the geographic South Pole, Antarctica. The IceCube realtime alert point of contact can be reached at roc@icecube.wisc.edu",
  "circularId": 28715,
  "createdOn": 1603271880000,
  "email": "cristina.lagunas@desy.de",
  "subject": "IceCube-201021A: IceCube observation of a high-energy neutrino candidate event",
  "submitter": "Cristina Lagunas Gualda at DESY  <cristina.lagunas@desy.de>",
  "eventId": "IceCube-201021A"
}