Planck pre-launch status: Low Frequency Instrument calibration and expected scientific performance
A. Mennella, M. Bersanelli, R. C. Butler, F. Cuttaia, O. D'Arcangelo,, R. J. Davis, M. Frailis, S. Galeotta, A. Gregorio, C. R. Lawrence, R., Leonardi, S. R. Lowe, N. Mandolesi, M. Maris, P. Meinhold, L. Mendes, G., Morgante, M. Sandri, L. Stringhetti, L. Terenzi, M. Tomasi
TL;DR
This paper reports the calibration results and expected scientific performance of the Planck Low Frequency Instrument (LFI) based on ground tests, highlighting its stability, sensitivity, and systematic effect rejection.
Contribution
It provides the first comprehensive calibration and performance assessment of the LFI before launch, establishing a baseline for in-flight measurements.
Findings
LFI exhibits excellent 1/f stability and systematic effect rejection.
LFI is the most sensitive instrument of its kind.
Calibration parameters will be refined during the mission.
Abstract
We give the calibration and scientific performance parameters of the Planck Low Frequency Instrument (LFI) measured during the ground cryogenic test campaign. These parameters characterise the instrument response and constitute our best pre-launch knowledge of the LFI scientific performance. The LFI shows excellent stability and rejection of instrumental systematic effects; measured noise performance shows that LFI is the most sensitive instrument of its kind. The set of measured calibration parameters will be updated during flight operations through the end of the mission.
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