High-energy neutrino event IceCube-260805A detected with follow-up observations.

AI Summary

IceCube detected a high-energy neutrino event with a 90% containment region near a known gamma-ray source, and subsequent searches revealed no additional neutrino events, while a faint supernova-like transient was identified nearby.

Measurements

Notices (1)

IceCube — NEUTRINO · Wed, 05 Aug 2026 14:01:39 GMT

GCN Circulars (3)

GCN-45337 — IceCube-260805A · Sun, 09 Aug 2026 23:42:20 GMT
The IceCube Neutrino Observatory conducted a search for additional neutrino events related to IceCube-260805A and found zero track-like events within the 90% containment region, indicating no significant excess of neutrino activity. The sensitivity of the detector to neutrino point sources with an E^-2.5 spectrum was reported, with 90% of detectable events having energies between 200 GeV and 70,000 GeV.

GCN-45310 — IceCube-260805A · Fri, 07 Aug 2026 16:29:17 GMT
A neutrino event, IceCube-260805A, detected by the IceCube Neutrino Observatory, has been followed up by the Zwicky Transient Facility (ZTF) using the Palomar 48-inch telescope. One transient candidate, ZTF26aaskzvj/AT 2026jrc, was identified within the neutrino localization region, associated with a nearby galaxy at a redshift of 0.0192 (~85 Mpc). This candidate is a supernova-like transient that peaked 100 days prior and is now much fainter.

GCN-45294 — IceCube-260805A · Thu, 06 Aug 2026 00:02:49 GMT
On August 5, 2026, the IceCube Neutrino Observatory detected a high-energy neutrino candidate event with a moderate probability of astrophysical origin. The event's refined direction places it near a known gamma-ray source, FL16Y J0402.5+2615, with a 90% containment region.