{
  "bibcode": "2021GCN.29454....1I",
  "body": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\nOn 21/02/10 at 11:53:55.65 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 average astrophysical neutrino purity for Gold alerts is 50%. This alert has an estimated false alarm rate of 0.464 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/134979_17138286.amon), more sophisticated reconstruction algorithms have been applied offline, with the direction refined to:\n\nDate: 21/02/10\nTime: 11:53:55.65 UT\nRA: 206.06 (+ 1.40 - 0.95 deg 90% PSF containment) J2000\nDec: 4.78 (+ 0.62 - 0.56 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 is one Fermi-LAT 4FGL source inside the 90% localization region, 4FGL J1342.7+0505, located at RA 205.69 deg and Dec 5.09 deg (J2000), at a distance of 0.49 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": 29454,
  "createdOn": 1612968178000,
  "email": "cristina.lagunas@desy.de",
  "subject": "IceCube-210210A: IceCube observation of a high-energy neutrino candidate event",
  "submitter": "Cristina Lagunas Gualda at DESY  <cristina.lagunas@desy.de>",
  "eventId": "IceCube-210210A"
}