Speaker
Description
ArtDeco is beam-deconvolution code, designed for absolute CMB measurements.
Is has been successfully applied to beam analysis for the LFI instrument of the Planck mission up to multipole lmax=1500.
Given time-ordered data and known beam shapes as input, the code removes the effects of asymmetric beam shape, yielding as output a map with symmetrized effective beam.
In particular, the method can be used to correct for the beam-induced leakage of temperature signal into polarization. Further developments include applications to power-spectrum estimation. The methodology is based on efficient use of Wigner D-matrices.
We present briefly the algorithmic background, and discuss the computational requirements and the possibility af applying the methodology to future CMB experiments.
As a recent development, we discuss the possibility of combining beam-deconvolution with noise reduction and component separation within a Gibbs sampling framework (BeyondPlanck), and present preliminary simulation results.
References:
E. Keihänen and M. Reinecke. ArtDeco: a beam-deconvolution code for absolute cosmic microwave background measurements. Astronomy and Astrophysics, 548:A110, December 2012
E. Keihänen, K. Kiiveri, H. Kurki-Suonio, and M. Reinecke. Application of beam deconvolution to power spectrum estimation. MNRAS, 466:1348, 2017
