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Planck 2015 results: III. LFI systematic uncertainties

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dc.contributor.author Ade P.
dc.contributor.author Aumont J.
dc.contributor.author Baccigalupi C.
dc.contributor.author Banday A.
dc.contributor.author Barreiro R.
dc.contributor.author Bartolo N.
dc.contributor.author Basak S.
dc.contributor.author Battaglia P.
dc.contributor.author Battaner E.
dc.contributor.author Benabed K.
dc.contributor.author Benoit-Lévy A.
dc.contributor.author Bernard J.
dc.contributor.author Bersanelli M.
dc.contributor.author Bielewicz P.
dc.contributor.author Bonaldi A.
dc.contributor.author Bonavera L.
dc.contributor.author Bond J.
dc.contributor.author Borrill J.
dc.contributor.author Burigana C.
dc.contributor.author Butler R.
dc.contributor.author Calabrese E.
dc.contributor.author Catalano A.
dc.contributor.author Christensen P.
dc.contributor.author Colombo L.
dc.contributor.author Cruz M.
dc.contributor.author Curto A.
dc.contributor.author Cuttaia F.
dc.contributor.author Danese L.
dc.contributor.author Davies R.
dc.contributor.author Davis R.
dc.contributor.author De Bernardis P.
dc.contributor.author De Rosa A.
dc.contributor.author De Zotti G.
dc.contributor.author Delabrouille J.
dc.contributor.author Dickinson C.
dc.contributor.author Diego J.
dc.contributor.author Doré O.
dc.contributor.author Ducout A.
dc.contributor.author Dupac X.
dc.contributor.author Elsner F.
dc.contributor.author Enßlin T.
dc.contributor.author Eriksen H.
dc.contributor.author Finelli F.
dc.contributor.author Frailis M.
dc.contributor.author Franceschet C.
dc.contributor.author Franceschi E.
dc.contributor.author Galeotta S.
dc.contributor.author Galli S.
dc.contributor.author Ganga K.
dc.contributor.author Ghosh T.
dc.contributor.author Giard M.
dc.contributor.author Giraud-Héraud Y.
dc.contributor.author Gjerløw E.
dc.contributor.author González-Nuevo J.
dc.contributor.author Górski K.
dc.contributor.author Gregorio A.
dc.contributor.author Gruppuso A.
dc.contributor.author Hansen F.
dc.contributor.author Harrison D.
dc.contributor.author Hernández-Monteagudo C.
dc.contributor.author Herranz D.
dc.contributor.author Hildebrandt S.
dc.contributor.author Hivon E.
dc.contributor.author Hobson M.
dc.contributor.author Hornstrup A.
dc.contributor.author Hovest W.
dc.date.accessioned 2018-09-19T20:05:32Z
dc.date.available 2018-09-19T20:05:32Z
dc.date.issued 2016
dc.identifier.issn 0004-6361
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/142546
dc.description.abstract © ESO, 2016.We present the current accounting of systematic effect uncertainties for the Low Frequency Instrument (LFI) that are relevant to the 2015 release of the Planck cosmological results, showing the robustness and consistency of our data set, especially for polarization analysis. We use two complementary approaches: (i) simulations based on measured data and physical models of the known systematic effects; and (ii) analysis of difference maps containing the same sky signal ("null-maps"). The LFI temperature data are limited by instrumental noise. At large angular scales the systematic effects are below the cosmic microwave background (CMB) temperature power spectrum by several orders of magnitude. In polarization the systematic uncertainties are dominated by calibration uncertainties and compete with the CMB E-modes in the multipole range 10-20. Based on our model of all known systematic effects, we show that these effects introduce a slight bias of around 0.2σ on the reionization optical depth derived from the 70GHz EE spectrum using the 30 and 353GHz channels as foreground templates. At 30GHz the systematic effects are smaller than the Galactic foreground at all scales in temperature and polarization, which allows us to consider this channel as a reliable template of synchrotron emission. We assess the residual uncertainties due to LFI effects on CMB maps and power spectra after component separation and show that these effects are smaller than the CMB amplitude at all scales. We also assess the impact on non-Gaussianity studies and find it to be negligible. Some residuals still appear in null maps from particular sky survey pairs, particularly at 30 GHz, suggesting possible straylight contamination due to an imperfect knowledge of the beam far sidelobes.
dc.relation.ispartofseries Astronomy and Astrophysics
dc.subject Cosmic background radiation
dc.subject Cosmology: observations
dc.subject Methods: data analysis
dc.subject Space vehicles: instruments
dc.title Planck 2015 results: III. LFI systematic uncertainties
dc.type Article
dc.relation.ispartofseries-volume 594
dc.collection Публикации сотрудников КФУ
dc.source.id SCOPUS00046361-2016-594-SID84990862163


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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