High-energy neutrino IceCube-260722A detected with a 90% containment region, but no clear astrophysical counterpart found.

AI Summary

The IceCube observatory detected a high-energy neutrino event on July 22, 2026, with an estimated energy of 114.97 GeV. Initial and update alerts indicated a 90% containment region around RA 190.55 and Dec 31. However, follow-up observations identified a Type Ia supernova as unrelated to the neutrino event, and no additional neutrino activity was observed in subsequent searches.

Measurements

Notices (1)

IceCube — NEUTRINO · Wed, 22 Jul 2026 06:58:22 GMT

GCN Circulars (4)

GCN-45217 — IceCube-260722A · Sun, 26 Jul 2026 15:58:08 GMT
The transient event ZTF26abjbxfs/SN 2026vts, initially considered a possible counterpart to the neutrino event IceCube-260722A, has been classified as a Type Ia supernova based on spectroscopic observations using the Nordic Optical Telescope. This classification indicates that the transient is unrelated to the neutrino event.

GCN-45199 — IceCube-260722A · Thu, 23 Jul 2026 18:29:07 GMT
The IceCube Neutrino Observatory conducted a search for additional neutrino events related to IceCube-260722A and found no significant excess in both a 1000-second and a 2-day time window, indicating no additional neutrino activity from the source.

GCN-45198 — IceCube-260722A · Thu, 23 Jul 2026 18:22:44 GMT
The Zwicky Transient Facility (ZTF) has identified a high-significance transient candidate, ZTF26abjbxfs, associated with the neutrino event IceCube-260722A. This candidate is very blue and located near the edge of galaxy SDSS J124512.84+303550.1, with a spectroscopic redshift of z=0.0978, suggesting a potential high-energy neutrino emission scenario.

GCN-45194 — IceCube-260722A · Wed, 22 Jul 2026 08:50:23 GMT
On July 26, 2022, the IceCube Neutrino Observatory detected a high-energy neutrino candidate event with a moderate probability of being astrophysical in origin. The event's direction was refined to RA 190.55 and Dec 31.0, with no known gamma-ray sources in the vicinity.