General information
IceCube-260610A is a track-like high-energy neutrino candidate detected by IceCube on 2026-06-10 at 20:02:41.03 UT and selected by the Gold alert stream. The refined position is RA 309.20 deg, Dec 37.22 deg, with a reported atmospheric-background false alarm rate of 0.1495 events per year.
Wavelength coverage
- Neutrino: IceCube reported a Gold-track event with average Gold-alert astrophysical neutrino purity of 50% and noted uncertainty in p_astro due to limited instrumented-volume traversal.
- X-ray: EP-FXT began follow-up 1.9 hours after the neutrino trigger for 7.9 ks and reported several detected sources, none significantly variable compared with historical fluxes or upper limits.
- Optical: ZTF observed in g and r starting 10.2 hours after event time, covering 95.9% of the reported localization region to typical depth 21.0 mag, and found no candidate counterparts.
- Gamma-ray: two Fermi 4FGL-DR4 catalog sources are located within the 90% uncertainty region, with separations of 0.77 deg and 1.45 deg from the best-fit neutrino position.
No radio, infrared, ultraviolet, gravitational-wave, or TeV observations are mentioned.
Lightcurve and spectrum
- EP-FXT reports no significant X-ray variability among detected sources within the neutrino localization uncertainty region.
- ZTF reports no optical candidate counterparts from real-time image subtraction and alert filtering.
- No spectra are reported.
Redshift
What’s special vs typical
- The event is notable as an IceCube Gold high-energy track candidate with a reported FAR of 0.1495 events per year and prompt multi-band follow-up.
- Compared with exceptional multi-messenger events, it remains less distinctive because no electromagnetic counterpart or transient candidate is reported in the provided circulars.