A high-confidence "Gold" alert issued by IceCube with an estimated signalness probability of 89% (sub-millimeter track originating within the Antarctic ice volume). Emitting a deposited energy of ~185 TeV, the event triggered multi-wavelength ground and space-based follow-up campaigns from Fermi, Swift, and optical survey telescopes to search for coincident flaring active galactic nuclei.
| Observatory / Instrument | Spectral Regime | Observational Detection & Counterpart Findings |
|---|---|---|
|
Swift XRT
|
X-ray (0.3–10 keV)
|
Observed candidate AGN counterparts in error ellipse; no anomalous flare identified.
|
|
Fermi LAT
|
Gamma-ray (100 MeV – 100 GeV)
|
Analyzed 1-day and 1-month time windows for correlated blazar flares.
|
|
ZTF
|
Optical (g, r)
|
Tiled 95% of localization region; catalogued optical variability in 3 candidate galaxies.
|