Mitigating half-wave plate systematics at the map-making level: calibration requirements for LiteBIRD
Abstract
Although half-wave plates (HWPs) are becoming a popular choice of polarization modulators for cosmic microwave background (CMB) experiments, their non-idealities can introduce systematic effects that should be carefully characterized and mitigated. One possible mitigation strategy is to incorporate information about the non-idealities at the map-making level, which helps to reduce the HWP-induced distortions of the reconstructed CMB. Nevertheless, the non-idealities can only be known with finite precision. In this paper we investigate the consequences of discrepancies between their true frequency profiles and those assumed by the map-maker. We present an end-to-end framework, including a blind component-separation step, and use it to translate these discrepancies into a bias on the tensor-to-scalar ratio, r, for the LiteBIRD satellite mission. We subsequently derive realistic and conservative measurement requirements for accurately characterizing the HWP non-idealities to ensure they do not compromise LiteBIRD's ambitious scientific goals. We find that the obtained results are robust against sky models with varying complexity.
Related
- Mitigating scanning-induced systematics in Hipparcos andimplications for Gaia astrometry
- Setting requirements on out-of-band rejection for next-generation CMB experiments. Application to the LiteBIRD instrument
- Mitigating scanning-induced systematics in Hipparcos and implications for Gaia astrometry
- A cross-calibration approach for polarisation-sensitive detectors in CMB experiments: application to LiteBIRD's polarisation angle calibration
- Calibration-induced Systematics in SALT3 Training and Their Impact on Dark Energy Constraints from Stage IV Supernova Surveys
BibTeX
@article{raffuzzi2026mitigating,
title = {{Mitigating half-wave plate systematics at the map-making level: calibration requirements for LiteBIRD}},
author = {N Raffuzzi and A Carones and M Monelli and S Giardiello and L Pagano and Y Sakurai and H Ishino and Erwan Allys and A Anand and J. Aumont and A.J. Banday and G. Barbieri Ripamonti and R.B Barreiro and N Bartolo and S Basak and A Basyrov and Anaïs Besnard and M Bortolami and T Brinckmann and F Cacciotti and E Calabrese and P Campeti and F Carralot and F.J Casas and J Chandran and K Cheung and M Citran and L Clermont and F Columbro and A Coppolecchia and F Cuttaia and P de Bernardis and T de Haan and M de Lucia and P Diego-Palazuelos and H.K Eriksen and F Finelli and C Franceschet and U Fuskeland and G Galloni and M Galloway and M Gerbino and M Gervasi and T Ghigna and C Gimeno-Amo and A Gruppuso and M Hazumi and S Henrot-Versillé and L.T Hergt and E Hivon and K Kohri and L Lamagna and M Lattanzi and C Leloup and F Levrier and A.I Lonappan and M López-Caniego and G Luzzi and J Macias-Perez and V Maranchery},
journal = {JCAP},
year = {2026},
month = aug,
doi = {10.1088/1475-7516/2026/08/053},
eprint = {2602.02410},
archivePrefix = {arXiv},
url = {https://hal.science/hal-05514905v1},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Mitigating half-wave plate systematics at the map-making level: calibration requirements for LiteBIRD
AU - N Raffuzzi
AU - A Carones
AU - M Monelli
AU - S Giardiello
AU - L Pagano
AU - Y Sakurai
AU - H Ishino
AU - Erwan Allys
AU - A Anand
AU - J. Aumont
AU - A.J. Banday
AU - G. Barbieri Ripamonti
AU - R.B Barreiro
AU - N Bartolo
AU - S Basak
AU - A Basyrov
AU - Anaïs Besnard
AU - M Bortolami
AU - T Brinckmann
AU - F Cacciotti
AU - E Calabrese
AU - P Campeti
AU - F Carralot
AU - F.J Casas
AU - J Chandran
AU - K Cheung
AU - M Citran
AU - L Clermont
AU - F Columbro
AU - A Coppolecchia
AU - F Cuttaia
AU - P de Bernardis
AU - T de Haan
AU - M de Lucia
AU - P Diego-Palazuelos
AU - H.K Eriksen
AU - F Finelli
AU - C Franceschet
AU - U Fuskeland
AU - G Galloni
AU - M Galloway
AU - M Gerbino
AU - M Gervasi
AU - T Ghigna
AU - C Gimeno-Amo
AU - A Gruppuso
AU - M Hazumi
AU - S Henrot-Versillé
AU - L.T Hergt
AU - E Hivon
AU - K Kohri
AU - L Lamagna
AU - M Lattanzi
AU - C Leloup
AU - F Levrier
AU - A.I Lonappan
AU - M López-Caniego
AU - G Luzzi
AU - J Macias-Perez
AU - V Maranchery
PY - 2026
DA - 2026/08/31
JO - JCAP
DO - 10.1088/1475-7516/2026/08/053
UR - https://hal.science/hal-05514905v1
AB - Although half-wave plates (HWPs) are becoming a popular choice of polarization modulators for cosmic microwave background (CMB) experiments, their non-idealities can introduce systematic effects that should be carefully characterized and mitigated. One possible mitigation strategy is to incorporate information about the non-idealities at the map-making level, which helps to reduce the HWP-induced distortions of the reconstructed CMB. Nevertheless, the non-idealities can only be known with finite precision. In this paper we investigate the consequences of discrepancies between their true frequency profiles and those assumed by the map-maker. We present an end-to-end framework, including a blind component-separation step, and use it to translate these discrepancies into a bias on the tensor-to-scalar ratio, r, for the LiteBIRD satellite mission. We subsequently derive realistic and conservative measurement requirements for accurately characterizing the HWP non-idealities to ensure they do not compromise LiteBIRD's ambitious scientific goals. We find that the obtained results are robust against sky models with varying complexity.
ER -