Framework for analysis of next generation, polarized CMB data sets in the presence of Galactic foregrounds and systematic effects Article Swipe
C. Vergès
,
Josquin Errard
,
R. Stompor
·
YOU?
·
· 2021
· Open Access
·
· DOI: https://doi.org/10.1103/physrevd.103.063507
YOU?
·
· 2021
· Open Access
·
· DOI: https://doi.org/10.1103/physrevd.103.063507
Reaching the sufficient sensitivity to detect primordial B-modes requires modern CMB polarisation experiments to rely on new technologies, necessary for the deployment of arrays thousands of detectors with a broad frequency coverage and operating them for extended periods of time. This increased complexity of experimental design unavoidably introduces new instrumental and systematic effects, which may impact performance of the new instruments. In this work we extend the standard data analysis pipeline by including a (parametric) model of instrumental effects directly in the data model. We then correct for them in the analysis, accounting for the additional uncertainty in the final results. We embed these techniques within a general, end-to-end formalism for estimating the impact of the instrument and foreground models on constraints on the amplitude of the primordial B-mode signal. We focus on the parametric component separation approach which we generalize to allow for simultaneous estimation of instrumental and foreground parameters. We demonstrate the framework by studying the effects induced by an achromatic half-wave plate (HWP), which lead to a frequency-dependent variation of the instrument polarisation angle, and experimental bandpasses which define observational frequency bands. We assume a typical Stage-3 CMB polarisation experiment, and show that maps recovered from raw data collected at each frequency band will unavoidably be linear mixtures of the Q and U Stokes parameters. We then derive a new generalized data model appropriate for such cases, and extend the component separation approach to account for it. We find that some of the instrumental parameters, in particularly those describing the HWP can be successfully constrained by the data themselves without need for external information, while others, like bandpasses, need to be known with good precision in advance.
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- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1103/physrevd.103.063507
- OA Status
- green
- Cited By
- 20
- References
- 42
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W3087743532
All OpenAlex metadata
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- OpenAlex ID
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https://openalex.org/W3087743532Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1103/physrevd.103.063507Digital Object Identifier
- Title
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Framework for analysis of next generation, polarized CMB data sets in the presence of Galactic foregrounds and systematic effectsWork title
- Type
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articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
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2021Year of publication
- Publication date
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2021-03-10Full publication date if available
- Authors
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C. Vergès, Josquin Errard, R. StomporList of authors in order
- Landing page
-
https://doi.org/10.1103/physrevd.103.063507Publisher landing page
- Open access
-
YesWhether a free full text is available
- OA status
-
greenOpen access status per OpenAlex
- OA URL
-
https://arxiv.org/pdf/2009.07814Direct OA link when available
- Concepts
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Cosmic microwave background, Parametric statistics, Polarization (electrochemistry), Physics, Amplitude, Detector, Computer science, Algorithm, Optics, Mathematics, Statistics, Anisotropy, Chemistry, Physical chemistryTop concepts (fields/topics) attached by OpenAlex
- Cited by
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20Total citation count in OpenAlex
- Citations by year (recent)
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2025: 7, 2024: 4, 2023: 4, 2022: 2, 2021: 3Per-year citation counts (last 5 years)
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42Number of works referenced by this work
- Related works (count)
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10Other works algorithmically related by OpenAlex
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