GCN Circular 23214
Subject
IceCube-180908A - IceCube observation of a high-energy neutrino candidate event
Date
2018-09-09T02:49:16Z (6 years ago)
From
Erik Blaufuss at U. Maryland/IceCube <blaufuss@umd.edu>
The IceCube Collaboration (http://icecube.wisc.edu/) reports:.
On September 8, 2018, IceCube detected a track-like, very-high-energy event with a high probability of being of astrophysical origin. The event was identified by the Extremely High Energy (EHE) track event selection. The IceCube detector was in a normal operating state. EHE events typically have a neutrino interaction vertex that is outside the detector, produce a muon that traverses the detector volume, and have a high light level (a proxy for energy).
After the initial automated alert (https://gcn.gsfc.nasa.gov/notices_amon/34507973_131475.amon), more
sophisticated reconstruction algorithms have been applied offline, with the direction refined to:
Date: 18/09/08
Time: 19:59:31.84 UT
RA: 144.58 [-1.45,+1.55] (deg 90% PSF containment) J2000
Dec: -2.13 [-1.2,+0.9] (deg 90% PSF containment) J2000
We encourage follow-up by ground and space-based instruments to help identify a possible astrophysical source for the candidate neutrino.
The 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