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GCN Circular 34163

IceCube-230707A - IceCube observation of a high-energy neutrino candidate track-like event
2023-07-07T18:14:43Z (10 months ago)
Massimiliano Lincetto at Ruhr-Universitaet Bochum <>
The IceCube Collaboration ( reports:

On 23-07-07 at 16:58:50.03 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 0.4443 events per year due
to atmospheric backgrounds.  The IceCube detector was in a normal
operating state at the time of detection.  After the initial automated
(, more
sophisticated reconstruction algorithms have been applied offline, with
the direction refined to:

Date: 23-07-07
Time: 16:58:50.03 UT
RA: 269.03 (+0.88 / -0.76 deg  90% PSF containment) J2000
Dec: -1.94 (+0.53 / -0.54 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.

There are no Fermi 4FGL-DR3 or 3FHL catalog sources in the 90%
uncertainty region. The nearest gamma-ray source in either catalog is
4FGL J1759.0-0107 at RA: 269.77 deg, Dec: -1.12 deg (1.10 deg away from
the best-fit event position).

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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