Bibcode
Planck Collaboration; Ade, P. A. R.; Aghanim, N.; Ashdown, M.; Aumont, J.; Baccigalupi, C.; Banday, A. J.; Barreiro, R. B.; Bartolo, N.; Battaglia, P.; Battaner, E.; Benabed, K.; Benoît, A.; Benoit-Lévy, A.; Bernard, J.-P.; Bersanelli, M.; Bielewicz, P.; Bock, J. J.; Bonaldi, A.; Bonavera, L.; Bond, J. R.; Borrill, J.; Bouchet, F. R.; Bucher, M.; Burigana, C.; Butler, R. C.; Calabrese, E.; Cardoso, J.-F.; Catalano, A.; Chamballu, A.; Christensen, P. R.; Colombi, S.; Colombo, L. P. L.; Crill, B. P.; Curto, A.; Cuttaia, F.; Danese, L.; Davies, R. D.; Davis, R. J.; de Bernardis, P.; de Rosa, A.; de Zotti, G.; Delabrouille, J.; Dickinson, C.; Diego, J. M.; Dole, H.; Donzelli, S.; Doré, O.; Douspis, M.; Ducout, A.; Dupac, X.; Efstathiou, G.; Elsner, F.; Enßlin, T. A.; Eriksen, H. K.; Fergusson, J.; Finelli, F.; Forni, O.; Frailis, M.; Franceschi, E.; Frejsel, A.; Galeotta, S.; Galli, S.; Ganga, K.; Giard, M.; Giraud-Héraud, Y.; Gjerløw, E.; González-Nuevo, J.; Górski, K. M.; Gratton, S.; Gregorio, A.; Gruppuso, A.; Hansen, F. K.; Hanson, D.; Harrison, D. L.; Henrot-Versillé, S.; Herranz, D.; Hildebrandt, S. R.; Hivon, E.; Hobson, M.; Holmes, W. A.; Hornstrup, A.; Hovest, W.; Huffenberger, K. M.; Hurier, G.; Jaffe, A. H.; Jaffe, T. R.; Juvela, M.; Keihänen, E.; Keskitalo, R.; Kisner, T. S.; Knoche, J.; Krachmalnicoff, N.; Kunz, M.; Kurki-Suonio, H.; Lagache, G.; Lähteenmäki, A.; Lamarre, J.-M.; Lasenby, A.; Lattanzi, M. et al.
Bibliographical reference
Astronomy and Astrophysics, Volume 594, id.A5, 24 pp.
Advertised on:
8
2016
Journal
Citations
57
Refereed citations
56
Description
We present a description of the pipeline used to calibrate the Planck
Low Frequency Instrument (LFI) timelines into thermodynamic temperatures
for the Planck 2015 data release, covering four years of uninterrupted
operations. As in the 2013 data release, our calibrator is provided by
the spin-synchronous modulation of the cosmic microwave background
dipole, but we now use the orbital component, rather than adopting the
Wilkinson Microwave Anisotropy Probe (WMAP) solar dipole. This allows
our 2015 LFI analysis to provide an independent Solar dipole estimate,
which is in excellent agreement with that of HFI and within 1σ
(0.3% in amplitude) of the WMAP value. This 0.3% shift in the
peak-to-peak dipole temperature from WMAP and a general overhaul of the
iterative calibration code increases the overall level of the LFI maps
by 0.45% (30 GHz), 0.64% (44 GHz), and 0.82% (70 GHz) in temperature
with respect to the 2013 Planck data release, thus reducing the
discrepancy with the power spectrum measured by WMAP. We estimate that
the LFI calibration uncertainty is now at the level of 0.20% for the 70
GHz map, 0.26% for the 44 GHz map, and 0.35% for the 30 GHz map. We
provide a detailed description of the impact of all the changes
implemented in the calibration since the previous data release.