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

Zack Li, Thibaut Louis, Erminia Calabrese, Hidde Jense, David Alonso, Zachary Atkins, J. Richard Bond, Steve K. Choi, Jo Dunkley, Giulio Fabbian, Xavier Garrido, Andrew H. Jaffe, Mathew S. Madhavacheril, P. Daniel Meerburg, Umberto Natale, Frank J. Qu

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish (US)
Article number048
JournalJournal of Cosmology and Astroparticle Physics
Volume2023
Issue number9
DOIs
StatePublished - Sep 1 2023

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics

Keywords

  • CMBR experiments
  • cosmological parameters from CMBR

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