Extending the Planck mission in “LFI only mode” beyond January 2013
Date Issued
2012
Author(s)
Planck LFI Core Team
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BUTLER, REGINALD CHRISTOPHER
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DE ZOTTI, Gianfranco
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GREGORIO, Anna
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Tomasi, Maurizio
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Bouchet, Francois
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Efstathiou, George
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Lamarre, Jean-Michel
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Lawrence, Charles
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Nørgaard-Nielsen, Hans-Ulrich
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Pearson, David
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Puget, Jean-Loup
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Tauber, Jan
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Pajot, Francois
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Vibert, Laurent
Abstract
We propose to extend the Planck mission in “LFI-only” mode until 13 August 2013, which will permit the
completion of an 8th full-sky survey for all LFI detectors. This extension is made possible by the predicted
lifetime of the 20K sorption cooler now in operation, which far exceeds previous projections. The additional
observations will lead to a significant improvement in the control of systematic effects and calibration
accuracy through a set of new powerful null tests probing the 6-months, 1-year, and 2-years time scales. The
current status of the Planck data analysis indicates that such improvement may be very important for a full
extraction of Planck cosmological science at low multipoles, especially for polarisation. We also note that
the LFI may be the last instrument delivering full-sky temperature maps in its frequency range in a very long
time, adding to its legacy value.
Volume
PL-LFI-PST-TN-107
Rights
open.access
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