IceCube detects high-energy neutrino IceCube-260712A with no identified optical or gamma-ray counterpart.

AI Summary

The IceCube neutrino observatory detected a high-energy neutrino event on July 12, 2026, with a moderate astrophysical likelihood. Follow-up observations by ZTF, LAST, and Fermi-LAT did not identify any optical or gamma-ray counterparts.

Measurements

Notices (1)

IceCube — NEUTRINO · Sun, 12 Jul 2026 11:06:48 GMT

GCN Circulars (5)

GCN-45168 — IceCube-260712A · Wed, 15 Jul 2026 15:08:15 GMT
The Zwicky Transient Facility (ZTF) and GROWTH collaborations observed the localization region of the neutrino event IceCube-260712A using the Palomar 48-inch telescope, covering 97.5% of the reported area. No candidate counterparts were detected, consistent with previous findings.

GCN-45159 — IceCube-260712A · Tue, 14 Jul 2026 18:58:13 GMT
The IceCube Collaboration performed a search for additional neutrino events around the time of the alert IceCube-260712A and found no significant excess of track events, indicating no additional neutrino activity in the specified time windows. The sensitivity of the IceCube detector to neutrino point sources was reported for both a 1000-second and a 2-day time window.

GCN-45157 — IceCube-260712A · Tue, 14 Jul 2026 15:05:38 GMT
The Large Array Survey Telescope (LAST) conducted optical follow-up observations of the IceCube neutrino candidate IC-260712A, starting 31.8 hours after the neutrino event. No candidate transient optical counterpart was detected, with a 5-sigma limiting magnitude of 20.1 in the neutrino footprint.

GCN-45146 — IceCube-260712A · Mon, 13 Jul 2026 11:13:23 GMT
The Fermi-LAT collaboration reported on the analysis of gamma-ray observations related to the high-energy neutrino event IC260712A detected by IceCube. No significant new gamma-ray emission was found within the 90% confidence localization of the neutrino event, with upper limits on the flux provided for different integration times.

GCN-45141 — IceCube-260712A · Sun, 12 Jul 2026 13:57:38 GMT
On July 26, 2012, the IceCube Neutrino Observatory detected a high-energy neutrino candidate event with a moderate probability of being astrophysical in origin. The event was tracked with a refined direction and had an estimated false alarm rate of 0.147 events per year due to atmospheric backgrounds.