Planck 2013 results. III. LFI systematic uncertainties

Jussi Varis, Planck Collaboration

    Research output: Contribution to journalArticleScientificpeer-review

    8 Citations (Scopus)

    Abstract

    We present the current estimate of instrumental and systematic effect uncertainties for the Planck-Low Frequency Instrument relevant to the first release of the Planck cosmological results. We give an overview of the main effects and of the tools and methods applied to assess residuals in maps and power spectra. We also present an overall budget of known systematic effect uncertainties, which are dominated by sidelobe straylight pick-up and imperfect calibration. However, even these two effects are at least two orders of magnitude weaker than the cosmic microwave background fluctuations as measured in terms of the angular temperature power spectrum. A residual signal above the noise level is present in the multipole range l <20, most notably at 30?GHz, and is probably caused by residual Galactic straylight contamination. Current analysis aims to further reduce the level of spurious signals in the data and to improve the systematic effects modelling, in particular with respect to straylight and calibration uncertainties.
    Original languageEnglish
    Article numberA3
    Number of pages23
    JournalAstronomy and Astrophysics
    Volume571
    DOIs
    Publication statusPublished - 2014
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    power spectra
    calibration
    sidelobes
    budgets
    multipoles
    contamination
    effect
    low frequencies
    microwaves
    estimates
    modeling
    temperature
    budget
    noise level
    analysis
    method
    microwave

    Keywords

    • cosmic background radiation
    • cosmology
    • data analysis

    Cite this

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    title = "Planck 2013 results.: III. LFI systematic uncertainties",
    abstract = "We present the current estimate of instrumental and systematic effect uncertainties for the Planck-Low Frequency Instrument relevant to the first release of the Planck cosmological results. We give an overview of the main effects and of the tools and methods applied to assess residuals in maps and power spectra. We also present an overall budget of known systematic effect uncertainties, which are dominated by sidelobe straylight pick-up and imperfect calibration. However, even these two effects are at least two orders of magnitude weaker than the cosmic microwave background fluctuations as measured in terms of the angular temperature power spectrum. A residual signal above the noise level is present in the multipole range l <20, most notably at 30?GHz, and is probably caused by residual Galactic straylight contamination. Current analysis aims to further reduce the level of spurious signals in the data and to improve the systematic effects modelling, in particular with respect to straylight and calibration uncertainties.",
    keywords = "cosmic background radiation, cosmology, data analysis",
    author = "Jussi Varis and {Planck Collaboration}",
    note = "Project code: 18080",
    year = "2014",
    doi = "10.1051/0004-6361/201321574",
    language = "English",
    volume = "571",
    journal = "Astronomy and Astrophysics",
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    }

    Planck 2013 results. III. LFI systematic uncertainties. / Varis, Jussi; Planck Collaboration.

    In: Astronomy and Astrophysics, Vol. 571, A3, 2014.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Planck 2013 results.

    T2 - III. LFI systematic uncertainties

    AU - Varis, Jussi

    AU - Planck Collaboration

    N1 - Project code: 18080

    PY - 2014

    Y1 - 2014

    N2 - We present the current estimate of instrumental and systematic effect uncertainties for the Planck-Low Frequency Instrument relevant to the first release of the Planck cosmological results. We give an overview of the main effects and of the tools and methods applied to assess residuals in maps and power spectra. We also present an overall budget of known systematic effect uncertainties, which are dominated by sidelobe straylight pick-up and imperfect calibration. However, even these two effects are at least two orders of magnitude weaker than the cosmic microwave background fluctuations as measured in terms of the angular temperature power spectrum. A residual signal above the noise level is present in the multipole range l <20, most notably at 30?GHz, and is probably caused by residual Galactic straylight contamination. Current analysis aims to further reduce the level of spurious signals in the data and to improve the systematic effects modelling, in particular with respect to straylight and calibration uncertainties.

    AB - We present the current estimate of instrumental and systematic effect uncertainties for the Planck-Low Frequency Instrument relevant to the first release of the Planck cosmological results. We give an overview of the main effects and of the tools and methods applied to assess residuals in maps and power spectra. We also present an overall budget of known systematic effect uncertainties, which are dominated by sidelobe straylight pick-up and imperfect calibration. However, even these two effects are at least two orders of magnitude weaker than the cosmic microwave background fluctuations as measured in terms of the angular temperature power spectrum. A residual signal above the noise level is present in the multipole range l <20, most notably at 30?GHz, and is probably caused by residual Galactic straylight contamination. Current analysis aims to further reduce the level of spurious signals in the data and to improve the systematic effects modelling, in particular with respect to straylight and calibration uncertainties.

    KW - cosmic background radiation

    KW - cosmology

    KW - data analysis

    U2 - 10.1051/0004-6361/201321574

    DO - 10.1051/0004-6361/201321574

    M3 - Article

    VL - 571

    JO - Astronomy and Astrophysics

    JF - Astronomy and Astrophysics

    SN - 0004-6361

    M1 - A3

    ER -