ArtDeco: A beam deconvolution code for absolute CMB measurements

Abstract

We present a method for beam deconvolution for cosmic microwave background (CMB) anisotropy measurements. The code takes as input the time-ordered data, along with the corresponding detector pointings and known beam shapes, and produces as output the harmonic a_Tlm, a_Elm, and a_Blm coefficients of the observed sky. From these one can further construct temperature and Q and U polarisation maps. The method is applicable to absolute CMB measurements with wide sky coverage, and is independent of the scanning strategy. We test the code with extensive simulations, mimicking the resolution and data volume of Planck 30GHz and 70GHz channels, but with exaggerated beam asymmetry. We apply it to multipoles up to l=1700 and examine the results in both pixel space and harmonic space. We also test the method also in presence of white noise.

15 pages

References in corpus (4)

• Making sky maps from Planck data
• Making Maps from Planck LFI 30GHz Data
• Map-making in small field modulated CMB polarisation experiments: approximating the maximum-likelihood method
• PReBeaM for Planck: A Polarized Regularized Beam Deconvolution Map-Making Method

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• QuickPol: Fast calculation of effective beam matrices for CMB polarization
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• BeyondPlanck I. Global Bayesian analysis of the Planck Low Frequency Instrument data
• Continuous phase spaces and the time evolution of spins: star products and spin-weighted spherical harmonics
• Full-sky beam convolution for cosmic microwave background applications
• Removing beam asymmetry bias in precision CMB temperature and polarisation experiments
• Accelerating Cosmic Microwave Background map-making procedure through preconditioning
• Bayesian inference on the sphere beyond statistical isotropy
• BeyondPlanck II. CMB map-making through Gibbs sampling
• MAPPRAISER: A massively parallel map-making framework for multi-kilo pixel CMB experiments
• Geometrical and physical optics analysis for mm-wavelength refractor telescopes designed to map the cosmic microwave background
• The impact of beam deconvolution on noise properties in CMB measurements: Application to Planck LFI
• Application of beam deconvolution technique to power spectrum estimation for CMB measurements
• Optimal bolometer transfer function deconvolution for CMB experiments through maximum likelihood mapmaking
• Beam-deconvolved Planck LFI maps