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Combining Systematic Effects in CMB Polarization Experiments through map-based simulations: application to LiteBIRD's HWP non-idealities and detectors non-linearity — arXiv:2609.00841

Source: arXiv (en)
Original: https://arxiv.org/abs/2609.00841
License (as archived): CC0-1.0
Archived: 2026-10-17T07:28:09.836Z
SHA-256 of the archived text: 35020aa12c74481bb7af4943bbf95a41f28bb4029770e03d4dc1f2eebad06181
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How to cite

Combining Systematic Effects in CMB Polarization Experiments through map-based simulations: application to LiteBIRD's HWP non-idealities and detectors non-linearity — arXiv:2609.00841 — arXiv (en), https://arxiv.org/abs/2609.00841 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_8dff24c8a380 (Metraipolis archive dc_8dff24c8a380, sha256 35020aa12c74481bb7af4943bbf95a41f28bb4029770e03d4dc1f2eebad06181)

BibTeX

@misc{dc8dff24c8a380,
  title = {Combining Systematic Effects in CMB Polarization Experiments through map-based simulations: application to LiteBIRD's HWP non-idealities and detectors non-linearity — arXiv:2609.00841},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2609.00841},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_8dff24c8a380; sha256 35020aa12c74481bb7af4943bbf95a41f28bb4029770e03d4dc1f2eebad06181},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2609.00841. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

We quantify the impact of coupled instrumental systematics on next-generation CMB polarization experiments targeting primordial $B$-mode polarization, with a focus on the forthcoming \textit{LiteBIRD} satellite mission. We study the interplay between the non-linear response of Transition-Edge Sensor (TES) bolometers and Half-Wave Plate (HWP) non-idealities, in particular synchronous signals arising from differential emissivity. We develop a map-based formalism that captures the resulting intensity-to-polarization leakage by explicitly solving the binning map-making equations, avoiding the need for computationally expensive time-ordered data simulations. We apply this framework to \textit{LiteBIRD}, adopting its baseline scanning strategy and frequency configuration, and perform analyses at both single- and multi-frequency levels, including Galactic foregrounds and blind component separation. We find that while detector non-linearity and HWP non-idealities individually induce negligible bias on the tensor-to-scalar ratio $r$, their coupling can generate non-trivial contamination, driven by large signals such as the solar dipole and amplified in high-frequency channels by foreground leakage. From these results, we derive joint requirements on detector non-linearity and HWP differential emission, and discuss their implications for the instrument design and calibration strategy of \textit{LiteBIRD} and future CMB polarization missions targeting $r \lesssim 10^{-3}$.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-09-02 in astro-ph.IM).
Categorie arXiv: Cosmology and Nongalactic Astrophysics (astro-ph.CO) ; Instrumentation and Methods for Astrophysics (astro-ph.IM).
Pagina del lavoro: https://arxiv.org/abs/2609.00841 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-10-17T07:19:24.033Z dalla pagina https://arxiv.org/catchup/astro-ph.IM/2026-09-02?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).