Improved Coincident and Coherent Detection Statistics for Searches for Gravitational Wave Ringdown Signals

Abstract

We study an improved method for detecting gravitational wave (GW) signals from perturbed black holes by earth-based detectors in the quest for searching for intermediate-mass black holes (IMBHs). Such signals, called ringdowns, are damped sinusoids whose frequency and damping constant can be used to measure a black hole's mass and spin. Utilizing the output from a matched filter analysis pipeline, we present an improved statistic for the detection of a ringdown signal that is found to be coincident in multiple detectors. The statistic addresses the non-Gaussianity of the data without the use of an additional signal-based waveform consistency test. We also develop coherent network statistics to check for consistency of signal amplitudes and phases in the different detectors with their different orientations and signal arrival times. We find that the detection efficiency can be improved at least by a few tens of percent by applying these multi-detector statistics primarily because of the ineffectiveness of single-detector based discriminators of non-stationary noise, such as the chi-square test, in the case of ringdown signals studied here.

References in corpus (10)

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Cited by in corpus (10)

• Gravitational waves from quasinormal modes of a class of Lorentzian wormholes
• Possible golden events for ringdown gravitational waves
• Gravitational waves from binary black hole mergers surrounded by scalar field clouds: Numerical simulations and observational implications
• Search for gravitational wave ringdowns from perturbed intermediate mass black holes in LIGO-Virgo data from 2005-2010
• Multivariate Classification with Random Forests for Gravitational Wave Searches of Black Hole Binary Coalescence
• Reduced Order and Surrogate Models for Gravitational Waves
• Tackling excess noise from bilinear and nonlinear couplings in gravitational-wave interferometers
• Sensitivity Comparison of Searches for Binary Black Hole Coalescences with Ground-based Gravitational-Wave Detectors
• An optimal ${\chi }^2$ discriminator against modelled noise-transients in interferometric data in searches for binary black-hole mergers
• Multi-detector null-stream-based ${\chi }^2$ statistic for compact binary coalescence searches