Identifying correlations between LIGO's astronomical range and auxiliary sensors using lasso regression

The range to which the Laser Interferometer Gravitational-Wave Observatory (LIGO) can observe astrophysical systems varies over time, limited by noise in the instruments and their environments. Identifying and removing the sources of noise that limit LIGO's range enables higher signal-to-noise...

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Published in:arXiv.org 2018-10
Main Authors: Walker, Marissa, Agnew, Alfonso F, Bidler, Jeffrey, Lundgren, Andrew, Macedo, Alexandra, Macleod, Duncan, Massinger, T J, Patane, Oliver, Smith, Joshua R
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Language:English
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Algorithms
Channels
Gravitational waves
Noise
Observatories
Regression analysis
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Agnew, Alfonso F
Bidler, Jeffrey
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Macedo, Alexandra
Macleod, Duncan
Massinger, T J
Patane, Oliver
Smith, Joshua R
description The range to which the Laser Interferometer Gravitational-Wave Observatory (LIGO) can observe astrophysical systems varies over time, limited by noise in the instruments and their environments. Identifying and removing the sources of noise that limit LIGO's range enables higher signal-to-noise observations and increases the number of observations. The LIGO observatories are continuously monitored by hundreds of thousands of auxiliary channels that may contain information about these noise sources. This paper describes an algorithm that uses linear regression, namely lasso (least absolute shrinkage and selection operator) regression, to analyze all of these channels and identify a small subset of them that can be used to reconstruct variations in LIGO's astrophysical range. Exemplary results of the application of this method to three different periods of LIGO Livingston data are presented, along with computational performance and current limitations.
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subjects Algorithms
Channels
Gravitational waves
Noise
Observatories
Regression analysis
title Identifying correlations between LIGO's astronomical range and auxiliary sensors using lasso regression
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