Abstract
The detection of gravitational waves from compact binary coalescence by Advanced LIGO and Advanced Virgo provides an opportunity to study the strong-field, highly relativistic regime of gravity. Gravitational-wave tests of general relativity (GR) typically assume Gaussian and stationary detector noise and, thus, do not account for non-Gaussian, transient noise features (glitches). We present the results obtained by performing parametrized gravitational-wave tests on simulated signals from binary-black-hole coalescence overlapped with three classes of frequently occurring instrumental glitches with distinctly different morphologies. We then review and apply three glitch mitigation methods and evaluate their effects on reducing false deviations from GR. By considering nine cases of glitches overlapping with simulated signals, we show that the short-duration, broadband blip and tomte glitches under consideration introduce false violations of GR, and using an inpainting filter and glitch model subtraction can consistently eliminate such false violations without introducing additional effects.
Highlights
Over a century after its formulation in 1915, Einstein’s general relativity (GR) remains as the accepted theory of gravity, passing all precision tests to date [1]
We investigated the effects on parametrized tests of GR of the glitches and their mitigation through bandpass filtering, inpainting, and BayesWave glitch model subtraction
The number of glitches considered in this investigation is not sufficient for us to give quantitative statements about the effects of certain glitch classes or mitigation methods on tests of GR, our analysis covered all stages of binary black holes (BBHs) coalescence in the time and frequency domain, and we are able to identify the effects case by case by comparing the unmitigated results with that mitigated by independent methods and expected GR results when the noise model is not violated
Summary
Over a century after its formulation in 1915, Einstein’s general relativity (GR) remains as the accepted theory of gravity, passing all precision tests to date [1]. Several GW tests of GR using coalescing BBHs are developed to test for generic deviations from GR without the need for signal models from competing theories of gravity [8]. These assumptions cannot account for transient, non-Gaussian noise features, commonly referred to as glitches [26–28]. It is of interest to extend the study to parametrized tests of GR, as the additional degree(s) of freedom introduced by parametrized deformations of the signal model may enhance such effects. This article is structured as follows: Section II describes the typical data model used in GW data analyses [24,25], which comprises of a GW signal in additive stationary and Gaussian noise. The parametrized test of GR to glitch-overlapped BBHcoalescence GW signals before and after glitch mitigation
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