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Accurate modeling and mitigation of overlapping signals and glitches in gravitational-wave data

Hourihane, Sophie and Chatziioannou, Katerina and Wijngaarden, Marcella and Davis, Derek and Littenberg, Tyson and Cornish, Neil (2022) Accurate modeling and mitigation of overlapping signals and glitches in gravitational-wave data. Physical Review D, 106 (4). Art. No. 042006. ISSN 2470-0010. doi:10.1103/physrevd.106.042006.

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The increasing sensitivity of gravitational-wave detectors has brought about an increase in the rate of astrophysical signal detections as well as the rate of “glitches”; transient and non-Gaussian detector noise. Temporal overlap of signals and glitches in the detector presents a challenge for inference analyses that typically assume the presence of only Gaussian detector noise. In this study we perform an extensive exploration of the efficacy of a recently proposed method that models the glitch with sine-Gaussian wavelets while simultaneously modeling the signal with compact-binary waveform templates. We explore a wide range of glitch families and signal morphologies and demonstrate that the joint modeling of glitches and signals (with wavelets and templates respectively) can reliably separate the two. We find that the glitches that most affect parameter estimation are also the glitches that are well modeled by such wavelets due to their compact time-frequency signature. As a further test, we investigate the robustness of this analysis against waveform systematics like those arising from the exclusion of higher-order modes and spin-precession effects. Our analysis provides an estimate of the signal parameters; the glitch waveform to be subtracted from the data and an assessment of whether some detected excess power consists of a glitch, signal, or both. We analyze the low-significance triggers (191225_215715 and 200114_020818) and find that they are both consistent with glitches overlapping high-mass signals.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Hourihane, Sophie0000-0002-9152-0719
Chatziioannou, Katerina0000-0002-5833-413X
Wijngaarden, Marcella0000-0003-2804-4075
Davis, Derek0000-0001-5620-6751
Littenberg, Tyson0000-0002-9574-578X
Cornish, Neil0000-0002-7435-0869
Additional Information:© 2022 American Physical Society. (Received 31 May 2022; accepted 27 June 2022; published 15 August 2022) This research has made use of data, software and/or web tools obtained from the Gravitational Wave Open Science Center [133], a service of LIGO Laboratory, the LIGO Scientific Collaboration and the Virgo Collaboration. Virgo is funded by the French Centre National de Recherche Scientifique (CNRS), the Italian Istituto Nazionale della Fisica Nucleare (INFN) and the Dutch Nikhef, with contributions by Polish and Hungarian institutes. This material is based upon work supported by NSF’s LIGO Laboratory which is a major facility fully funded by the National Science Foundation. The authors are grateful for computational resources provided by the LIGO Laboratory and supported by NSF Grants No. PHY-0757058 and No. PHY-0823459. S. H. and K. C. were supported by NSF Grant No. PHY-2110111. N. J. C. was supported by NSF Grant No. PHY-1912053. Software: gwpy [134], matplotlib [135]. D. D. was supported by the National Science Foundation as part of the LIGO laboratory. T. L. was supported by funding from the NASA LISA study office.
Group:Astronomy Department, LIGO
Funding AgencyGrant Number
Centre National de la Recherche Scientifique (CNRS)UNSPECIFIED
Istituto Nazionale di Fisica Nucleare (INFN)UNSPECIFIED
Polish Academy of SciencesUNSPECIFIED
Hungarian Academy of SciencesUNSPECIFIED
Issue or Number:4
Record Number:CaltechAUTHORS:20220816-200913000
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:116299
Deposited By: George Porter
Deposited On:16 Aug 2022 21:07
Last Modified:16 Aug 2022 21:07

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