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  Planck intermediate results: LVII. Joint Planck LFI and HFI data processing

Akrami, Y., Andersen, K. J., Ashdown, M., Baccigalupi, C., Ballardini, M., Banday, A. J., et al. (2020). Planck intermediate results: LVII. Joint Planck LFI and HFI data processing. Astronomy and Astrophysics, 643: A42. doi:10.1051/0004-6361/202038073.

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Akrami, Y., Author
Andersen, K. J., Author
Ashdown, M., Author
Baccigalupi, C., Author
Ballardini, M., Author
Banday, A. J., Author
Barreiro, R. B., Author
Bartolo, N., Author
Basak, S., Author
Benabed, K., Author
Bernard, J.-P., Author
Bersanelli, M., Author
Bielewicz, P., Author
Bond, J. R., Author
Borrill, J., Author
Burigana, C., Author
Butler, R. C., Author
Calabrese, E., Author
Casaponsa, B., Author
Chiang, H. C., Author
Colombo, L. P. L., AuthorCombet, C., AuthorCrill, B. P., AuthorCuttaia, F., Authorde Bernardis, P., Authorde Rosa, A., Authorde Zotti, G., AuthorDelabrouille, J., AuthorValentino, E. Di, AuthorDiego, J. M., AuthorDoré, O., AuthorDouspis, M., AuthorDupac, X., AuthorEriksen, H. K., AuthorFernandez-Cobos, R., AuthorFinelli, F., AuthorFrailis, M., AuthorFraisse, A. A., AuthorFranceschi, E., AuthorFrolov, A., AuthorGaleotta, S., AuthorGalli, S., AuthorGanga, K., AuthorGerbino, M., AuthorGhosh, T., AuthorGonzález-Nuevo, J., AuthorGórski, K. M., AuthorGruppuso, A., AuthorGudmundsson, J. E., AuthorHandley, W., AuthorHelou, G., AuthorHerranz, D., AuthorHildebrandt, S. R., AuthorHivon, E., AuthorHuang, Z., AuthorJaffe, A. H., AuthorJones, W. C., AuthorKeihänen, E., AuthorKeskitalo, R., AuthorKiiveri, K., AuthorKim, J.1, Author              Kisner, T. S., AuthorKrachmalnico, N., AuthorKunz, M., AuthorKurki-Suonio, H., AuthorLasenby, A., AuthorLattanzi, M., AuthorLawrence, C. R., AuthorLe Jeune, M., AuthorLevrier, F., AuthorLiguori, M., AuthorLilje, P. B., AuthorLilley, M., AuthorLindholm, V., AuthorLópez-Caniego, M., AuthorLubin, P. M., AuthorMacías-Pérez, J. F., AuthorMaino, D., AuthorMandolesi, N., AuthorMarcos-Caballero, A., AuthorMaris, M., AuthorMartin, P. G., AuthorMartínez-González, E., AuthorMatarrese, S., AuthorMauri, N., AuthorMcEwen, J. D., AuthorMeinhold, P. R., AuthorMennella, A., AuthorMigliaccio, M., AuthorMitra, S., AuthorMolinari, D., AuthorMontier, L., AuthorMorgante, G., AuthorMoss, A., AuthorNatoli, P., AuthorPaoletti, D., AuthorPartridge, B., AuthorPatanchon, G., AuthorPearson, D., AuthorPearson, T. J., AuthorPerrotta, F., AuthorPiacentini, F., AuthorPolenta, G., AuthorRachen, J. P., AuthorReinecke, M.2, Author              Remazeilles, M., AuthorRenzi, A., AuthorRocha, G., AuthorRosset, C., AuthorRoudier, G., AuthorRubiño-Martín, J. A., AuthorRuiz-Granados, B., AuthorSalvati, L., AuthorSavelainen, M., AuthorScott, D., AuthorSirignano, C., AuthorSirri, G., AuthorSpencer, L. D., AuthorSuur-Uski, A.-S., AuthorSvalheim, L. T., AuthorTauber, J. A., AuthorTavagnacco, D., AuthorTenti, M., AuthorTerenzi, L., AuthorThommesen, H., AuthorToffolatti, L. , AuthorTomasi, M., AuthorTristram, M., AuthorTrombetti, T., AuthorValiviita, J., AuthorTent, B. Van, AuthorVielva, P., AuthorVilla, F., AuthorVittorio, N., AuthorWandelt, B. D., AuthorWehus, I. K., AuthorZacchei, A., AuthorZonca, A., Author more..
1Cosmology, MPI for Astrophysics, Max Planck Society, ou_159876              
2Computational Structure Formation, MPI for Astrophysics, Max Planck Society, ou_2205642              


Free keywords: -
 Abstract: We present the NPIPE processing pipeline, which produces calibrated frequency maps in temperature and polarization from data from the Planck Low Frequency Instrument (LFI) and High Frequency Instrument (HFI) using high-performance computers. NPIPE represents a natural evolution of previous Planck analysis efforts, and combines some of the most powerful features of the separate LFI and HFI analysis pipelines. For example, following the LFI 2018 processing procedure, NPIPE uses foreground polarization priors during the calibration stage in order to break scanning-induced degeneracies. Similarly, NPIPE employs the HFI 2018 time-domain processing methodology to correct for bandpass mismatch at all frequencies. In addition, NPIPE introduces several improvements, including, but not limited to: inclusion of the 8% of data collected during repointing manoeuvres; smoothing of the LFI reference load data streams; in-flight estimation of detector polarization parameters; and construction of maximally independent detector-set split maps. For component-separation purposes, important improvements include: maps that retain the CMB Solar dipole, allowing for high-precision relative calibration in higher-level analyses; well-defined single-detector maps, allowing for robust CO extraction; and HFI temperature maps between 217 and 857 GHz that are binned into 0′.9 pixels (Nside = 4096), ensuring that the full angular information in the data is represented in the maps even at the highest Planck resolutions. The net effect of these improvements is lower levels of noise and systematics in both frequency and component maps at essentially all angular scales, as well as notably improved internal consistency between the various frequency channels. Based on the NPIPE maps, we present the first estimate of the Solar dipole determined through component separation across all nine Planck frequencies. The amplitude is (3366.6 ± 2.7) μK, consistent with, albeit slightly higher than, earlier estimates. From the large-scale polarization data, we derive an updated estimate of the optical depth of reionization of τ = 0.051 ± 0.006, which appears robust with respect to data and sky cuts. There are 600 complete signal, noise and systematics simulations of the full-frequency and detector-set maps. As a Planck first, these simulations include full time-domain processing of the beam-convolved CMB anisotropies. The release of NPIPE maps and simulations is accompanied with a complete suite of raw and processed time-ordered data and the software, scripts, auxiliary data, and parameter files needed to improve further on the analysis and to run matching simulations.


Language(s): eng - English
 Dates: 2020-11-11
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1051/0004-6361/202038073
Other: LOCALID: 3283022
 Degree: -



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Title: Astronomy and Astrophysics
  Other : Astron. Astrophys.
Source Genre: Journal
Publ. Info: France : EDP Sciences S A
Pages: - Volume / Issue: 643 Sequence Number: A42 Start / End Page: - Identifier: ISSN: 1432-0746
CoNE: https://pure.mpg.de/cone/journals/resource/954922828219_1