Hybrid geometric-random template placement algorithm for gravitational wave searches from compact binary coalescences

Abstract

Astrophysical compact binary systems consisting of neutron stars and blackholes are an important class of gravitational wave (GW) sources for advanced LIGO detectors. Accurate theoretical waveform models from the inspiral, merger and ringdown phases of such systems, are used to filter detector data under the template based matched filtering paradigm. An efficient grid over the parameter space at a fixed minimal match has a direct impact on the overall time taken by these searches. We present a new hybrid geometric-random template placement algorithm for signals described by two masses and one spin magnitude parameters. Such template banks could potentially be used in GW searches from binary neutron stars and neutron star-blackhole systems. The template placement is robust and is able to automatically accommodate curvature and boundary effects with no fine tuning. We also compare these banks against vanilla-stochastic template banks and show that while both are equally efficient in the fitting-factor sense, the bank sizes are $\sim 25\%$ larger in the stochastic method. Further, we show that the generation of the proposed hybrid banks can be sped-up by nearly an order of magnitude over the stochastic bank. Generic issues related to optimal implementation are discussed in detail. These improvements are expected to directly reduce the computational cost of gravitational wave searches.

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Cited by in corpus (34)

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• GW190814: Gravitational Waves from the Coalescence of a 23 M${}_{\odot }$ Black Hole with a 2.6 M${}_{\odot }$ Compact Object
• GWTC-3: Compact Binary Coalescences Observed by LIGO and Virgo During the Second Part of the Third Observing Run
• GW190425: Observation of a Compact Binary Coalescence with Total Mass $\sim 3.4M_{\odot }$
• GW190521: A Binary Black Hole Merger with a Total Mass of $150M_{\odot }$
• Observation of gravitational waves from two neutron star-black hole coalescences
• GW190412: Observation of a Binary-Black-Hole Coalescence with Asymmetric Masses
• GWTC-2.1: Deep Extended Catalog of Compact Binary Coalescences Observed by LIGO and Virgo During the First Half of the Third Observing Run
• Realtime search for compact binary mergers in Advanced LIGO and Virgo's third observing run using PyCBC Live
• Effectual gravitational-wave template banks for coalescing compact binaries using a hybrid placement algorithm
• Template Bank for Compact Binary Coalescence Searches in Gravitational Wave Data: A General Geometric Placement Algorithm
• Mock data study for next-generation ground-based detectors: The performance loss of matched filtering due to correlated confusion noise
• An optimized PyCBC search for gravitational waves from intermediate-mass black hole mergers
• Characterizing the observation bias in gravitational-wave detections and finding structured population properties
• Spherical ansatz for parameter-space metrics
• Efficient Gravitational Wave Template Bank Generation with Differentiable Waveforms
• Establishing significance of gravitational-wave signals from a single observatory in the PyCBC offline search
• Optimized Search for a Binary Black Hole Merger Population in LIGO-Virgo O3 Data
• Hierarchical approach to matched filtering using a reduced basis
• A geometric template bank for the detection of spinning low-mass compact binaries with moderate orbital eccentricity
• The failure of the Fisher Matrix when including tidal terms: Considering construction of template banks of tidally deformed binary neutron stars
• Incorporating information from LIGO data quality streams into the PyCBC search for gravitational waves
• Beyond general relativity: designing a template-based search for exotic gravitational wave signals
• Template bank to search for exotic gravitational wave signals from astrophysical compact binaries
• Efficient Stochastic Template Bank using Inner Product Inequalities
• Reducing the number of templates for aligned-spin compact binary coalescence gravitational wave searches using metric-agnostic template nudging
• Gravitational-wave searches in the era of Advanced LIGO and Virgo
• Search for gravitational waves from eccentric binary black holes with an effective-one-body template
• Random projections in gravitational wave searches of compact binaries
• Obtaining Statistical Significance of Gravitational Wave Signals in Hierarchical Search
• Optimizing the low-latency localization of gravitational waves
• Performance of Random Template Banks
• Enhancing online estimation of CBC parameters with the low-latency MBTA analysis
• Hierarchical search for compact binary coalescences in the Advanced LIGO's first two observing runs