First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing Methods and Systematic Errors Limits
Gary Hinshaw,Cris W. Barnes,Charles L. Bennett,M. R. Greason,Mark Halpern,Robert S. Hill,N. Jarosik,Alan J. Kogut,Michele Limon,S. S. Meyer,N. Odegard,Lyman A. Page,David N. Spergel,Gregory S. Tucker,Janet L. Weiland,Edward J. Wollack,Edward L. Wright +16 more
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In this article, the authors describe the calibration and data processing methods used to generate full-sky maps of the cosmic microwave background (CMB) from the first year of Wilkinson Microwave Anisotropy Probe (WMAP) observations.Abstract:
We describe the calibration and data processing methods used to generate full-sky maps of the cosmic microwave background (CMB) from the first year of Wilkinson Microwave Anisotropy Probe (WMAP) observations. Detailed limits on residual systematic errors are assigned based largely on analyses of the flight data supplemented, where necessary, with results from ground tests. The data are calibrated in flight using the dipole modulation of the CMB due to the observatory's motion around the Sun. This constitutes a full-beam calibration source. An iterative algorithm simultaneously fits the time-ordered data to obtain calibration parameters and pixelized sky map temperatures. The noise properties are determined by analyzing the time-ordered data with this sky signal estimate subtracted. Based on this, we apply a pre-whitening filter to the time-ordered data to remove a low level of 1/f noise. We infer and correct for a small ~1% transmission imbalance between the two sky inputs to each differential radiometer, and we subtract a small sidelobe correction from the 23 GHz (K band) map prior to further analysis. No other systematic error corrections are applied to the data. Calibration and baseline artifacts, including the response to environmental perturbations, are negligible. Systematic uncertainties are comparable to statistical uncertainties in the characterization of the beam response. Both are accounted for in the covariance matrix of the window function and are propagated to uncertainties in the final power spectrum. We characterize the combined upper limits to residual systematic uncertainties through the pixel covariance matrix.read more
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Journal ArticleDOI
Results from the Wilkinson Microwave Anisotropy Probe
TL;DR: The Wilkinson Microwave Anisotropy Probe (WMAP) was used to obtain measurements of temperature and polarization of the cosmic microwave background with the unprecedented accuracy and precision as mentioned in this paper.
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BeyondPlanck. III. Commander3
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QUIJOTE scientific results -- VIII. Diffuse polarized foregrounds from component separation with QUIJOTE-MFI
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Journal ArticleDOI
QUIJOTE scientific results – VIII. Diffuse polarized foregrounds from component separation with QUIJOTE-MFI
E. de la Hoz,R. B. Barreiro,P. Vielva,E. Martínez-González,Jose Alberto Rubino-Martin,B. Casaponsa,F Guidi,M. Ashdown,Ricardo Genova-Santos,Eduardo Artal,F. J. Casas,R. Fernandez-Cobos,M Fernández-Torreiro,D. Herranz,Roger J. Hoyland,Anthony Lasenby,M. López-Caniego,Carlos H. López-Caraballo,M. Peel,Lucio Piccirillo,Frédérick Poidevin,Rafael Rebolo,B. Ruiz-Granados,D. Tramonte,F. Vansyngel,Robert A. Watson +25 more
TL;DR: In this article , the authors derived linearly polarized astrophysical component maps in the Northern Sky from the QUIJOTE-MFI data at 11 and 13 GHz in combination with the Wilkinson Microwave Anisotropy Probe K and Ka bands (23 and 33 GHz) and all Planck polarized channels (30-353 GHz), using the parametric component separation method B-SeCRET.