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Making maps of cosmic microwave background polarization for B-mode studies: the POLARBEAR example

Poletti, Davide and Steinbach, Bryan (2017) Making maps of cosmic microwave background polarization for B-mode studies: the POLARBEAR example. Astronomy & Astrophysics, 600 . Art. No. A60. ISSN 0004-6361.

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Analysis of cosmic microwave background (CMB) datasets typically requires some filtering of the raw time-ordered data. For instance, in the context of ground-based observations, filtering is frequently used to minimize the impact of low frequency noise, atmospheric contributions and/or scan synchronous signals on the resulting maps. In this work we have explicitly constructed a general filtering operator, which can unambiguously remove any set of unwanted modes in the data, and then amend the map-making procedure in order to incorporate and correct for it. We show that such an approach is mathematically equivalent to the solution of a problem in which the sky signal and unwanted modes are estimated simultaneously and the latter are marginalized over. We investigated the conditions under which this amended map-making procedure can render an unbiased estimate of the sky signal in realistic circumstances. We then discuss the potential implications of these observations on the choice of map-making and power spectrum estimation approaches in the context of B-mode polarization studies. Specifically, we have studied the effects of time-domain filtering on the noise correlation structure in the map domain, as well as impact it may haveon the performance of the popular pseudo-spectrum estimators. We conclude that although maps produced by the proposed estimators arguably provide the most faithful representation of the sky possible given the data, they may not straightforwardly lead to the best constraints on the power spectra of the underlying sky signal and special care may need to be taken to ensure this is the case. By contrast, simplified map-makers which do not explicitly correct for time-domain filtering, but leave it to subsequent steps in the data analysis, may perform equally well and be easier and faster to implement. We focused on polarization-sensitive measurements targeting the B-mode component of the CMB signal and apply the proposed methods to realistic simulations based on characteristics of an actual CMB polarization experiment, POLARBEAR. Our analysis and conclusions are however more generally applicable.

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Additional Information:© ESO, 2017. Received: 3 August 2016. Accepted: 18 December 2016. The POLARBEAR project is funded by the National Science Foundation under Grants Nos. AST-0618398 and AST-1212230. The James Ax Observatory operates in the Parque Astronómico Atacama in Northern Chile under the auspices of the Comisión Nacional de Investigación Científica y Tecnológica de Chile (CONICYT). This research used resources of the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility supported by the Office of Science of the US Department of Energy under Contract No. DE-AC02-05CH11231. KEK authors acknowledge the support of MEXT KAKENHI Grant Number JP15H05891 and JSPS KAKENHI Grant Number JP26220709. In Japan, this work was supported by JSPS Core-to-Core Program, A. Advanced Research Networks and used computational resources of the HPCI system (Project ID:hp150132). In Italy, this work was supported by the RADIOFOREGROUNDS grant of the European Union’s Horizon 2020 research and innovation programme (COMPET-05-2015, grant agreement number 687312) as well as by the INDARK INFN Initiative. J.P. acknowledges support from the Science and Technology Facilities Council (grant number ST/L000652/1) and from the European Research Council under the European Union’s Seventh Framework Programme (FP/2007–2013)/ERC Grant Agreement No. [616170]. C.R. acknowledges support from a Australian Research Council’s Future Fellowship (FT150100074).
Funding AgencyGrant Number
Department of Energy (DOE)DE-AC02-05CH11231
Ministry of Education, Culture, Sports, Science and Technology (MEXT)JP15H05891
Ministry of Education, Culture, Sports, Science and Technology (MEXT)JP26220709
Japan Society for the Promotion of Science (JSPS)UNSPECIFIED
European Research Council (ERC)687312
Istituto Nazionale di Fisica Nucleare (INFN)UNSPECIFIED
Science and Technology Facilities Council (STFC)ST/L000652/1
European Research Council (ERC)616170
Australian Research CouncilFT150100074
Subject Keywords:cosmic background radiation - cosmology: observations
Record Number:CaltechAUTHORS:20170602-105912232
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Official Citation:Making maps of cosmic microwave background polarization for B-mode studies: the POLARBEAR example Davide Poletti, Giulio Fabbian, Maude Le Jeune, Julien Peloton, Kam Arnold, Carlo Baccigalupi, Darcy Barron, Shawn Beckman, Julian Borrill, Scott Chapman, Yuji Chinone, Ari Cukierman, Anne Ducout, Tucker Elleflot, Josquin Errard, Stephen Feeney, Neil Goeckner-Wald, John Groh, Grantland Hall, Masaya Hasegawa, Masashi Hazumi, Charles Hill, Logan Howe, Yuki Inoue, Andrew H. Jaffe, Oliver Jeong, Nobuhiko Katayama, Brian Keating, Reijo Keskitalo, Theodore Kisner, Akito Kusaka, Adrian T. Lee, David Leon, Eric Linder, Lindsay Lowry, Frederick Matsuda, Martin Navaroli, Hans Paar, Giuseppe Puglisi, Christian L. Reichardt, Colin Ross, Praween Siritanasak, Nathan Stebor, Bryan Steinbach, Radek Stompor, Aritoki Suzuki, Osamu Tajima, Grant Teply and Nathan Whitehorn A&A, 600 (2017) A60 DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:77917
Deposited By: Ruth Sustaita
Deposited On:02 Jun 2017 18:34
Last Modified:03 Oct 2019 18:03

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