{
  "bibcode": "2020GCN.28433....1I",
  "body": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\nOn 20/09/16 at 20:40:30.95 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 threshold astrophysical neutrino purity for Bronze alerts is 30%. This alert has an estimated false alarm rate of 2.48 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/134498_12605830.amon), more sophisticated reconstruction algorithms have been applied offline, with the direction refined to:\n\nDate: 20/09/16\nTime:  20:40:30.95 UT\nRA: 109.78 +1.08  -1.44 (deg  90% PSF containment) J2000\nDec: 14.36 +0.88  -0.85  (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 J0725.2+1425, associated with the BL Lac object 4C +14.23, at RA: 111.32 deg, Dec: 14.42 deg (1.50 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 alert point of contact can be reached at roc@icecube.wisc.edu",
  "circularId": 28433,
  "createdOn": 1600294838000,
  "email": "blaufuss@umd.edu",
  "subject": "IceCube-200916A - IceCube observation of a high-energy neutrino candidate track-like event",
  "submitter": "Erik Blaufuss at U. Maryland/IceCube  <blaufuss@umd.edu>",
  "eventId": "IceCube-200916A"
}