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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:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
OSTI Identifier:
1569097
Alternate Identifier(s):
OSTI ID: 1597081
Report Number(s):
arXiv:1810.09470; FERMILAB-PUB-19-680-A
Journal ID: ISSN 0035-8711
Grant/Contract Number:  
AC02-07CH11359
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:
Royal Astronomical Society
Country of Publication:
United Kingdom
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY

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:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1093/mnras/stz2542

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