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Title: SIToolBox : A Package for Bayesian Estimation of the Isotropy Violation in the CMB Sky

Abstract

The standard model of cosmology predicts a statistically isotropic (SI) CMB sky. However, the SI violation signals are always present in an observed sky-map. Different cosmological artifacts, 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 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. Fermilab
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1597081
Report Number(s):
arXiv:1810.09470; FERMILAB-PUB-19-680-A
oai:inspirehep.net:1699978
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Journal Name:
Mon.Not.Roy.Astron.Soc.
Additional Journal Information:
Journal Volume: 489; Journal Issue: 4
Country of Publication:
United States
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 States: 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 States. doi:10.1093/mnras/stz2542.
Das, Santanu. Mon . "SIToolBox : A Package for Bayesian Estimation of the Isotropy Violation in the CMB Sky". United States. doi:10.1093/mnras/stz2542. https://www.osti.gov/servlets/purl/1597081.
@article{osti_1597081,
title = {SIToolBox : A Package for Bayesian Estimation of the Isotropy Violation in the CMB Sky},
author = {Das, Santanu},
abstractNote = {The standard model of cosmology predicts a statistically isotropic (SI) CMB sky. However, the SI violation signals are always present in an observed sky-map. Different cosmological artifacts, 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 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 = {Mon.Not.Roy.Astron.Soc.},
number = 4,
volume = 489,
place = {United States},
year = {2019},
month = {11}
}

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