A reconstructed rotation field of the Cosmic Microwave Background derived from Planck 2018 polarization data. The dataset contains spherical-harmonic decompositions of the birefringence field up to L=10, with a dominant dipole at Galactic coordinates (ℓ, b) ≈ (278°, 18°). Version 1.41 by Amy Condit refines the MASTER calibration and includes expanded robustness testing products.
Use Cases
- Validate cosmic birefringence models based on the reconstructed spherical-harmonic αₗₘ field.
- Analyze the morphology and stability of the rotation field dipole based on the provided Mollweide projection maps.
- Perform robustness checks on CMB data processing using the included frequency-split and half-mission test products.
- Study the power distribution of the anisotropic birefringence signal using the provided evaluation metrics.
Strengths
- Version 1.41 includes extended MASTER calibration and robustness validation, as stated in the title.
- The dataset is based on combined SMICA and NILC EB cross-spectra from the Planck 2018 polarization data.
- Robustness tests include frequency-split, half-mission, and mask apodization analyses, which returned consistent results.
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
- The description metadata is limited; actual data quality requires manual inspection after download.
Provenance
- Source
- Planck 2018 polarization data, processed by 22 Blue CMB Birefringence & Standing-Wave Rotation Field.
- Collection Method
- Reconstructed using MASTER-calibrated analysis of EB cross-spectra and decomposed into spherical-harmonic modes.
- Freshness
- Last updated 2026-06-17 23:51:31