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The Simons Observatory: a new open-source power spectrum pipeline applied to the Planck legacy data

Li, Zack, Louis, Thibaut, Calabrese, Erminia ORCID:, Jense, Hidde, Alonso, David, Atkins, Zachary, Bond, J. Richard, Choi, Steve K., Dunkley, Jo, Fabbian, Giulio ORCID:, Garrido, Xavier, Jaffe, Andrew H., Madhavacheril, Mathew S., Meerburg, P. Daniel, Natale, Umberto and Qu, Frank J. 2023. The Simons Observatory: a new open-source power spectrum pipeline applied to the Planck legacy data. Journal of Cosmology and Astroparticle Physics 2023 (09) , 048. 10.1088/1475-7516/2023/09/048
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We present a reproduction of the Planck 2018 angular power spectra at ℓ > 30, and associated covariance matrices, for intensity and polarization maps at 100, 143 and 217 GHz. This uses a new, publicly available, pipeline that is part of the PSpipe package. As a test case we use the same input maps, ancillary products, and analysis choices as in the Planck 2018 analysis, and find that we can reproduce the spectra to 0.1σ precision, and the covariance matrices to 10%. We show that cosmological parameters estimated from our re-derived products agree with the public Planck products to 0.1σ, providing an independent cross-check of the Planck team's analysis. Going forward, the publicly-available code can be easily adapted to use alternative input maps, data selections and analysis choices, for future optimal analysis of Planck data with new ground-based Cosmic Microwave Background data.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Advanced Research Computing @ Cardiff (ARCCA)
Physics and Astronomy
Publisher: IOP Publishing
ISSN: 1475-7516
Date of First Compliant Deposit: 31 January 2024
Date of Acceptance: 10 August 2023
Last Modified: 18 Jun 2024 16:12

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