A characterization method for low-frequency environmental noise in LIGO
Instrumentation and Methods for Astrophysics2022-12-21v1General Relativity and Quantum CosmologyData Analysis, Statistics and ProbabilityInstrumentation and Detectors
We present a method to characterize the noise in ground-based gravitational-wave observatories such as the Laser Gravitational-Wave Observatory (LIGO). This method uses linear regression algorithms such as the least absolute shrinkage and selection operator (LASSO) to identify noise sources and analyzes the detector output versus noise witness sensors to quantify the coupling of such noise. Our method can be implemented with currently available resources at LIGO, which avoids extra coding or direct experimentation at the LIGO sites. We present two examples to validate and estimate the coupling of elevated ground motion at frequencies below 10 Hz with noise in the detector output.
@article{arxiv.2209.04452,
title = {A characterization method for low-frequency environmental noise in LIGO},
author = {Guillermo Valdes and Adam Hines and Andrea Nelson and Yanqi Zhang and Felipe Guzman},
journal= {arXiv preprint arXiv:2209.04452},
year = {2022}
}