Addressing the challenges of detecting time-overlapping compact binary coalescences

Abstract

Standard detection and analysis techniques for transient gravitational waves make the assumption that detector data contains, at most, one signal at any time. As detectors improve in sensitivity, this assumption will no longer be valid. In this paper we examine how current search techniques for transient gravitational waves will behave under the presence of more than one signal. We perform searches on data sets containing time-overlapping compact binary coalescences. This includes a modelled, matched filter search (PyCBC), and an unmodelled coherent search, coherent WaveBurst (cWB). Both of these searches are used by the LIGO-Virgo-KAGRA collaboration. We find that both searches are capable of identifying both signals correctly when the signals are dissimilar in merger time, $|\Delta t_c|\ge 1$ second, with PyCBC losing only $1\%$ of signals for overlapping binary black hole mergers. Both pipelines can find signal pairings within the region $|\Delta t_c|<1$ second. However, clustering routines in the pipelines will cause only one of the two signals to be recovered, as such the efficiency is reduced. Within this region, we find that cWB can identify both signals. We also find that matched filter searches can be modified to provide estimates of the correct parameters for each signal.

arXiv comment17 pages, 12 figures, 4 tables

References in corpus (30)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Array Programming with NumPy
• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Advanced Virgo: a 2nd generation interferometric gravitational wave detector
• GW190425: Observation of a Compact Binary Coalescence with Total Mass $\sim 3.4M_{\odot }$
• Characterization of the LIGO detectors during their sixth science run
• Interferometer design of the KAGRA gravitational wave detector
• Using gravitational-wave observations and quasi-universal relations to constrain the maximum mass of neutron stars
• Observation of gravitational waves from two neutron star-black hole coalescences
• GW150914: The Advanced LIGO Detectors in the Era of First Discoveries
• The PyCBC search for gravitational waves from compact binary coalescence
• FINDCHIRP: an algorithm for detection of gravitational waves from inspiraling compact binaries
• An improved effective-one-body model of spinning, nonprecessing binary black holes for the era of gravitational-wave astrophysics with advanced detectors
• KAGRA: 2.5 Generation Interferometric Gravitational Wave Detector
• Method for detection and reconstruction of gravitational wave transients with networks of advanced detectors
• A chi-squared time-frequency discriminator for gravitational wave detection
• Multipolar Effective-One-Body Waveforms for Precessing Binary Black Holes: Construction and Validation
• Implementing a search for aligned-spin neutron star -- black hole systems with advanced ground based gravitational wave detectors
• Matter imprints in waveform models for neutron star binaries: tidal and self-spin effects
• Detecting binary compact-object mergers with gravitational waves: Understanding and Improving the sensitivity of the PyCBC search
• 3-OGC: Catalog of gravitational waves from compact-binary mergers
• The Timing of Nine Globular Cluster Pulsars
• Distance measures in gravitational-wave astrophysics and cosmology
• Extending the PyCBC search for gravitational waves from compact binary mergers to a global network
• Coherent WaveBurst, a pipeline for unmodeled gravitational-wave data analysis
• Biases in parameter estimation from overlapping gravitational-wave signals in the third generation detector era
• Towards inference of overlapping gravitational wave signals
• Noisy neighbours: inference biases from overlapping gravitational-wave signals
• Parameter Estimation Bias From Overlapping Binary Black Hole Events In Second Generation Interferometers
• Impacts of overlapping gravitational-wave signals on the parameter estimation: Toward the search for cosmological backgrounds

Cited by in corpus (15)

• The Science of the Einstein Telescope
• Possible Causes of False General Relativity Violations in Gravitational Wave Observations
• Mock data study for next-generation ground-based detectors: The performance loss of matched filtering due to correlated confusion noise
• Source Confusion from Neutron Star Binaries in Ground-Based Gravitational Wave Detectors is Minimal
• Parameter estimation methods for analyzing overlapping gravitational wave signals in the third-generation detector era
• Rapid pre-merger localization of binary neutron stars in third generation gravitational wave detectors
• Enabling multi-messenger astronomy with continuous gravitational waves: early warning and sky localization of binary neutron stars in Einstein Telescope
• Localization of binary neutron star mergers with a single Cosmic Explorer
• Decoding Long-duration Gravitational Waves from Binary Neutron Stars with Machine Learning: Parameter Estimation and Equations of State
• An interference-based method for the detection of strongly lensed gravitational waves
• Blind source separation in 3rd generation gravitational-wave detectors
• Wavelet-based tools to analyze, filter, and reconstruct transient gravitational-wave signals
• Compact Binary Coalescence Gravitational Wave Signals Counting and Separation
• Overlapping signals in next-generation gravitational wave observatories: A recipe for selecting the best parameter estimation technique
• A weakly-modeled search for compact binary coalescences in Einstein Telescope