Version 1.44 of a validation dataset for the cosmic microwave background polarization rotation field. It tests the stability of the observed anisotropy across different component-separation methods, Planck satellite frequency channels, and detector half-mission splits. The dataset was created by Condit, Amy for the 22 Blue CMB Birefringence & Standing-Wave Rotation Field project and was last updated on June 18, 2026.
Use Cases
- Validate the stability of the CMB polarization rotation axis based on different component-separation methods (SMICA and NILC).
- Assess the consistency of parity asymmetry metrics across different Planck frequency channels (100, 143, 217 GHz).
- Test the robustness of the preferred anisotropy axis using bootstrap resampling uncertainty tables.
- Compare rotation field spectra (L=2–10) generated from different detector half-mission splits (HM1, HM2, HMx).
Strengths
- Includes validation across three dimensions: component-separation method, frequency channel, and detector split.
- Empirical p-value of 6.06 × 10⁻⁶ established from 165,000 null simulations.
- All input files are SHA-256 verified for integrity.
- Uses a fixed apodized polarization mask with NSIDE=512 and f_sky ≈ 0.467.
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
- Description metadata is limited; actual data quality requires manual inspection after download.
Provenance
- Source
- Planck satellite data, processed by the 22 Blue CMB Birefringence & Standing-Wave Rotation Field project.
- Collection Method
- Validation analysis using component-separation methods (SMICA, NILC) on Planck frequency maps and half-mission splits.
- Freshness
- Last updated 2026-06-18 03:26:12; freshness should be verified.