A Simulation-Based Method for Correcting Mode Coupling in CMB Angular Power Spectra
Abstract
Modern CMB analysis pipelines regularly employ complex time-domain filters, beam models, masking, and other techniques during the production of sky maps and their corresponding angular power spectra. However, these processes can generate couplings between multipoles from the same spectrum and from different spectra, in addition to the typical power attenuation. Within the context of pseudo- based, MASTER-style analyses, the net effect of the time-domain filtering is commonly approximated by a multiplicative transfer function, , that can fail to capture mode mixing and is dependent on the spectrum of the signal. To address these shortcomings, we have developed a simulation-based spectral correction approach that constructs a two-dimensional transfer matrix, , which contains information about mode mixing in addition to mode attenuation. We demonstrate the application of this approach on data from the first flight of the SPIDER balloon-borne CMB experiment.
Cite
@article{arxiv.2111.01113,
title = {A Simulation-Based Method for Correcting Mode Coupling in CMB Angular Power Spectra},
author = {J. S. -Y. Leung and J. Hartley and J. M. Nagy and C. B. Netterfield and J. A. Shariff and P. A. R. Ade and M. Amiri and S. J. Benton and A. S. Bergman and R. Bihary and J. J. Bock and J. R. Bond and J. A. Bonetti and S. A. Bryan and H. C. Chiang and C. R. Contaldi and O. Doré and A. J. Duivenvoorden and H. K. Eriksen and M. Farhang and J. P. Filippini and A. A. Fraisse and K. Freese and M. Galloway and A. E. Gambrel and N. N. Gandilo and K. Ganga and R. Gualtieri and J. E. Gudmundsson and M. Halpern and M. Hasselfield and G. Hilton and W. Holmes and V. V. Hristov and Z. Huang and K. D. Irwin and W. C. Jones and A. Karakci and C. L. Kuo and Z. D. Kermish and S. Li and D. S. Y. Mak and P. V. Mason and K. Megerian and L. Moncelsi and T. A. Morford and M. Nolta and R. O'Brient and B. Osherson and I. L. Padilla and B. Racine and A. S. Rahlin and C. Reintsema and J. E. Ruhl and M. C. Runyan and T. M. Ruud and E. C. Shaw and C. Shiu and J. D. Soler and X. Song and A. Trangsrud and C. Tucker and R. S. Tucker and A. D. Turner and J. F. van der List and A. C. Weber and I. K. Wehus and S. Wen and D. V. Wiebe and E. Y. Young},
journal= {arXiv preprint arXiv:2111.01113},
year = {2022}
}
Comments
14 pages, 7 figures; updated to match published version