General information
IceCube-Cascade 260618A is an IceCube real-time cascade neutrino alert, with subsequent IceCube searches for additional track-like muon neutrino events around the alert time. The reported searches found no significant excess beyond the original alert event.
Wavelength coverage
- Neutrino: IceCube searched for additional track-like muon neutrino events within the 90% containment region of the cascade alert in both a 1000 s window and a 2-day window.
No observations are mentioned in gamma-ray, X-ray, ultraviolet, optical, infrared, radio, gravitational-wave, or cosmic-ray bands.
Lightcurve and spectrum
- 1000 s window: 2026-06-18 05:19:19.175 UTC to 2026-06-18 05:35:59.175 UTC; zero additional track-like events found within the 90% containment region, excluding the alert event; p-value = 1.00.
- 2-day window: 2026-06-17 05:27:39.175 UTC to 2026-06-19 05:27:39.175 UTC; p-value = 0.48, consistent with no significant excess of track events.
- Assumed spectrum for sensitivity reporting: E^-2.5.
- 1000 s sensitivity: E^2 dN/dE at 1 TeV ranges from 1.4e-01 to 1.5e-01 GeV cm^-2 within the 90% spatial containment region.
- 2-day sensitivity: E^2 dN/dE at 1 TeV ranges from 1.6e-01 to 1.8e-01 GeV cm^-2 within the 90% spatial containment region.
- For a source at this declination with an E^-2.5 spectrum, 90% of detected events would have energies approximately between 2e+02 GeV and 8e+04 GeV.
Redshift
What’s special vs typical