{
  "bibcode": "2016GCN.19787....1C",
  "body": "D.F. Cowen reports on behalf of the IceCube Collaboration:\n\nIceCube detected a candidate cosmic neutrino IceCube-160806A, \"AMON \nICECUBE EHE 128311 26552458\" at 12:21:33.00 UT on 16/08/06 \n(http://gcn.gsfc.nasa.gov/notices_amon/26552458_128311.amon) The event \nwas an Extremely High Energy (EHE) event with track-like characteristics \nand it arrived when the IceCube detector was in a normal operating \nstate.  EHE events satisfy a combination of high light level and zenith \nangle that enhances astrophysical signal relative to cosmic-ray-induced \nbackgrounds.  In contrast to the other active IceCube high energy \ntrack-like neutrino alert stream, known as \"HESE,\" EHE events are not \nrequired to start within the IceCube detector fiducial volume.\n\nAfter the initial automated alert, more sophisticated reconstruction\nalgorithms have been applied offline, with the direction refined to\nRA=122.81d and DEC=-0.8061d (J2000) in revision 1 of this alert.  The \nposition uncertainty is estimated from the initial realtime \nreconstruction from revision 0 of this alert, at 0.1 degrees or 6.7 \narcminutes radius (stat. only, 50% containment).  Lacking inclusion of \nsystematic effects, we expect this uncertainty underestimates the true \nuncertainty by roughly a factor of five.  We encourage followup by \nground and space-based instruments to help identify a possible \nastrophysical source for the candidate neutrino.\n\nThe IceCube Neutrino Observatory is a cubic-kilometer neutrino detector \noperating at the geographic South Pole, Antarctica.  The IceCube \nrealtime alert point of contact can be reached at roc@icecube.wisc.edu",
  "circularId": 19787,
  "createdOn": 1470759358000,
  "email": "dfc13@psu.edu",
  "subject": "IceCube 160806A EHE Neutrino Candidate Event",
  "submitter": "Doug Cowen at Penn State/IceCube  <dfc13@psu.edu>",
  "eventId": "IceCube-160806A"
}