IceCube detects high-energy neutrino with moderate astrophysical probability

AI Summary

IceCube detected a track-like neutrino event (IceCube-260807A) on 2026-08-07 at 06:04:41.70 UTC with energy ~112.61 TeV and moderate astrophysical probability (p_astro = 0.29). The event was localized to RA = 325.37° ± 4.26/-7.82° and Dec = 0.07° ± 0.98/-1.77° (90% containment). Follow-up observations by Fermi-LAT found no significant gamma-ray emission from the source region, and IceCube's own search detected no additional neutrino events in a 1000-second window (p-value = 1.00) or significant excess over 2 days (p-value = 0.45), consistent with a single isolated event.

Measurements

Notices (1)

IceCube — NEUTRINO · Fri, 07 Aug 2026 06:04:41 GMT

GCN Circulars (3)

GCN-45420 — IceCube-260807A · Sat, 22 Aug 2026 15:52:10 GMT
The Fermi-LAT collaboration reported on the analysis of gamma-ray observations related to the high-energy neutrino event IceCube-260807A, detected on 2026-08-07. No significant gamma-ray emission was detected from the vicinity of the neutrino event, with flux upper limits provided for different timescales. Regular monitoring of the source will continue due to Fermi's all-sky scanning mode.

GCN-45353 — IceCube-260807A · Tue, 11 Aug 2026 04:52:36 GMT
IceCube Neutrino Observatory conducted a search for additional neutrino events related to IceCube-260807A, finding zero track-like events in a 1000-second window and no significant excess in a 2-day window, indicating no significant neutrino activity from the source. The sensitivity and energy range for detecting neutrino point sources were also reported, providing insights into the observatory's capabilities.

GCN-45307 — IceCube-260807A · Fri, 07 Aug 2026 10:05:17 GMT
On August 26, 2007, the IceCube Neutrino Observatory detected a high-energy neutrino event with a moderate probability of being astrophysical. The event's direction was refined, and it was found to be near several gamma-ray sources, with one source, FL16Y J2136.6+0041, being particularly close.