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GCN Circular 24392

IceCube-190504A - IceCube observation of a high-energy neutrino candidate event
2019-05-04T22:57:44Z (5 years ago)
Claudio Kopper at IceCube/U of Alberta <>
The IceCube Collaboration ( reports:

On 19/05/04 18:25:18.39 UT IceCube detected a track-like, very-high-energy event with a high probability of being of astrophysical origin. The event was identified by the High Energy Starting Event (HESE) selection. The IceCube detector was in a normal operating state. HESE events have a neutrino vertex inside of the detector (to reduce background) and have a high light level (a proxy for energy).

After the initial automated alert (, the detailed angular uncertainty is still being evaluated and will be published later. At this time we propose to use the preliminary values reported in the GCN Notice:

Date: 19/05/04
Time: 18:25:18.39 UT 
RA:  65.7866 (J2000)
Dec:  -37.4431 (J2000)
Error radius: 73.79 arcmin (90% containment)

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
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