Local TE anomaly at ℓ ≈ 305 in Planck 2020 HiLLiPoP Data

Description: This dataset provides model-independent, reproducible evidence for a localized temperature–polarization (TE) anomaly at multipole ℓ ≈ 305 in the Planck 2020 HiLLiPoP data. The archive contains extracted cross-spectra from 36 independent frequency/split combinations, local inverse Fisher and covariance sub-blocks, and minimal statistical tests comparing ΛCDM with a localized extension (ΛCDM+X). The key result is a highly significant local improvement with Δχ² ≈ 1922 for 1 degree of freedom, derived directly from the provided CSV inputs without relying on Monte Carlo simulations. All included materials are sufficient to reproduce the reported statistics starting from the extracted Planck products. The full Planck likelihood archives are not included and must be obtained separately from official sources. Keywords: CMB, Planck 2020, HiLLiPoP, TE spectrum, localized anomaly, ΛCDM, reproducibility