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Title: sitoolbox: A package for Bayesian estimation of the isotropy violation in the CMB sky

Abstract

ABSTRACT The standard model of cosmology predicts a statistically isotropic (SI) cosmic microwave background (CMB) sky. However, the SI violation signals are always present in an observed sky-map. Different cosmological artefacts, measurement effects, and unavoidable effects during data analysis, etc. may lead to isotropy violation in an otherwise SI sky. Therefore, a proper data analysis technique should calculate all these SI violation signals, so that they can be matched with SI violation signals from the known sources, and then conclude if there is any intrinsic SI violation in the CMB sky. In one of our recent works, we presented a general Bayesian formalism for measuring the isotropy violation signals in the CMB sky in the presence of an idealized isotropic noise. In this paper, we have extended the mechanism and develop a software package, sitoolbox, for measuring SI violation in presence of anisotropic noise and masking.

Authors:
ORCiD logo [1]
  1. Department of Physics, University of Wisconsin - Madison, Madison WI 53706, USA, Fermi National Accelerator Laboratory, Batavia IL 60510, USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1569097
Resource Type:
Published Article
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
Journal Name: Monthly Notices of the Royal Astronomical Society Journal Volume: 489 Journal Issue: 4; Journal ID: ISSN 0035-8711
Publisher:
Oxford University Press
Country of Publication:
United Kingdom
Language:
English

Citation Formats

Das, Santanu. sitoolbox: A package for Bayesian estimation of the isotropy violation in the CMB sky. United Kingdom: N. p., 2019. Web. doi:10.1093/mnras/stz2542.
Das, Santanu. sitoolbox: A package for Bayesian estimation of the isotropy violation in the CMB sky. United Kingdom. doi:10.1093/mnras/stz2542.
Das, Santanu. Fri . "sitoolbox: A package for Bayesian estimation of the isotropy violation in the CMB sky". United Kingdom. doi:10.1093/mnras/stz2542.
@article{osti_1569097,
title = {sitoolbox: A package for Bayesian estimation of the isotropy violation in the CMB sky},
author = {Das, Santanu},
abstractNote = {ABSTRACT The standard model of cosmology predicts a statistically isotropic (SI) cosmic microwave background (CMB) sky. However, the SI violation signals are always present in an observed sky-map. Different cosmological artefacts, measurement effects, and unavoidable effects during data analysis, etc. may lead to isotropy violation in an otherwise SI sky. Therefore, a proper data analysis technique should calculate all these SI violation signals, so that they can be matched with SI violation signals from the known sources, and then conclude if there is any intrinsic SI violation in the CMB sky. In one of our recent works, we presented a general Bayesian formalism for measuring the isotropy violation signals in the CMB sky in the presence of an idealized isotropic noise. In this paper, we have extended the mechanism and develop a software package, sitoolbox, for measuring SI violation in presence of anisotropic noise and masking.},
doi = {10.1093/mnras/stz2542},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 4,
volume = 489,
place = {United Kingdom},
year = {2019},
month = {9}
}

Journal Article:
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This content will become publicly available on September 13, 2020
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