Southern Sky Preference of Ultra-High-Energy IceCube GOLD Events: A Statistical Indication of Centaurus-Direction Neutrino Sources

We report a statistically significant negative correlation between neutrino energy and declination (Dec) among IceCube GOLD-class alert events (2019–2026). Analyzing 54 GOLD events (Revision 1), we find that higher-energy neutrinos arrive preferentially from lower declinations (southern sky), with Spearman's ρ = −0.328 (p = 0.0155). Events with Dec < 0° show a mean energy of 1,036 TeV compared to 278 TeV for Dec ≥ 0° events (Mann-Whitney U test, p = 0.0362; ratio 3.73×). After correcting for IceCube's reduced sensitivity in the southern sky, the estimated true flux ratio reaches 10.2×. The southern sky direction is consistent with Centaurus A (NGC 5128, Dec = −43.0°), the nearest active galactic nucleus and a well-established ultra-high-energy cosmic ray candidate source. We conclude that the current non-detection of IceCube alerts from Cen A is a consequence of detector geometry rather than source absence. This prediction is testable by KM3NeT and IceCube-Gen2.