General information
IceCube-251210A is a track-like high-energy neutrino candidate from the ICECUBE_Astrotrack_GOLD stream (T0 = 2025-12-10 11:06:14.40 UTC) localized near RA 35.29 deg, Dec 20.34 deg. Follow-up reports from IceCube, Fermi-LAT, and wide-field optical surveys find no significant counterpart and provide upper limits.
Wavelength coverage
- Neutrino: IceCube GOLD alert; additional-neutrino searches in ±500 s and ±1 day show no significant excess (p=1.00 in both windows).
- Gamma-ray (GeV): Fermi-LAT all-sky survey analysis finds no >5σ new excess >100 MeV; provides flux upper limits for integrations from 1 day to ~17 years.
- Optical: DDOTI and ZTF imaged the region ~15–18 h after T0 and report only limiting magnitudes and no credible fading/uncatalogued counterpart.
No observations were mentioned in X-ray, UV, infrared, radio, TeV, or gravitational-wave bands.
Lightcurve and spectrum
- Optical limits: DDOTI w > 20.5 AB (10σ) at T+14.8–17.5 h; ZTF g/r imaging (300 s) to typical depth ~21.0 mag at ~T+15.4 h, with no convincing counterpart reported.
- GeV limits: Fermi-LAT assumes a power-law spectrum with photon index 2.0 and reports >100 MeV 95% flux UL <1.5e-08 ph cm^-2 s^-1 (1 month pre-T0) and <9.1e-08 ph cm^-2 s^-1 (1 day pre-T0), plus <2.2e-10 ph cm^-2 s^-1 for ~17 years.
Redshift
What’s special vs typical