V. Raymond
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View article: Simulation-based inference for gravitational-waves from intermediate-mass binary black holes in real noise
Simulation-based inference for gravitational-waves from intermediate-mass binary black holes in real noise Open
We present an exploratory investigation into using simulation-based inference techniques, specifically Flow-Matching Posterior Estimation, to construct a posterior density estimator trained using real gravitational-wave detector noise. Our…
View article: Real-time inference for binary neutron star mergers using machine learning
Real-time inference for binary neutron star mergers using machine learning Open
Mergers of binary neutron stars emit signals in both the gravitational-wave (GW) and electromagnetic spectra. Famously, the 2017 multi-messenger observation of GW170817 (refs. 1,2 ) led to scientific discoveries across cosmology 3 , nuclea…
View article: The impact of astrophysical priors on parameter inference for GW230529
The impact of astrophysical priors on parameter inference for GW230529 Open
We investigate the effects of prior selection on the inferred mass and spin parameters of the neutron star–black hole merger GW230529_181500. Specifically, we explore models motivated by astrophysical considerations, including massive bina…
View article: Searching for Scalar Field Dark Matter with LIGO
Searching for Scalar Field Dark Matter with LIGO Open
We report on a direct search for scalar field dark matter using data from LIGO’s third observing run. We analyze the coupling of size oscillations of the interferometer’s beam splitter and arm test masses that may be caused by scalar field…
View article: Compact binary coalescences: gravitational-wave astronomy with ground-based detectors
Compact binary coalescences: gravitational-wave astronomy with ground-based detectors Open
The era of gravitational wave astronomy began in 2015 with the observation of the signal from the merger of two black holes by the LIGO detectors; by 2021, almost 100 more such transient signals from coalescences of compact binaries of bla…
View article: Real-time gravitational-wave inference for binary neutron stars using machine learning
Real-time gravitational-wave inference for binary neutron stars using machine learning Open
Mergers of binary neutron stars (BNSs) emit signals in both the gravitational-wave (GW) and electromagnetic (EM) spectra. Famously, the 2017 multi-messenger observation of GW170817 led to scientific discoveries across cosmology, nuclear ph…
View article: The Impact of Astrophysical Priors on Parameter Inference for GW230529
The Impact of Astrophysical Priors on Parameter Inference for GW230529 Open
We investigate the effects of prior selection on the inferred mass and spin parameters of the neutron star-black hole merger GW230529\_181500. Specifically, we explore models motivated by astrophysical considerations, including massive bin…
View article: Simulation-based Inference for Gravitational-waves from Intermediate-Mass Binary Black Holes in Real Noise
Simulation-based Inference for Gravitational-waves from Intermediate-Mass Binary Black Holes in Real Noise Open
We present an exploratory investigation into using Simulation-based Inference techniques, specifically Flow-Matching Posterior Estimation, to construct a posterior density estimator trained using real gravitational-wave detector noise. Our…
View article: Searching for scalar field dark matter with LIGO
Searching for scalar field dark matter with LIGO Open
We report on a direct search for scalar field dark matter using data from LIGO's third observing run. We analyse the coupling of size oscillations of the interferometer's beamsplitter and arm test masses that may be caused by scalar field …
View article: Addressing the challenges of detecting time-overlapping compact binary coalescences
Addressing the challenges of detecting time-overlapping compact binary coalescences Open
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…
View article: Addressing the challenges of detecting time-overlapping compact binary coalescences
Addressing the challenges of detecting time-overlapping compact binary coalescences Open
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…
View article: General-relativistic precession in a black-hole binary - data release
General-relativistic precession in a black-hole binary - data release Open
This page contains the data release associated with the publication General-relativistic precession in a black-hole binary from Hannam, M. et al. In this publication we show that one of the events in the most recent LIGO-Virgo-Kagra (LVK) …
View article: General-relativistic precession in a black-hole binary - data release
General-relativistic precession in a black-hole binary - data release Open
This page contains the data release associated with the publication General-relativistic precession in a black-hole binary from Hannam, M. et al. In this publication we show that one of the events in the most recent LIGO-Virgo-Kagra (LVK) …
View article: General-relativistic precession in a black-hole binary
General-relativistic precession in a black-hole binary Open
The general-relativistic phenomenon of spin-induced orbital precession has not yet been observed in strong-field gravity. Gravitational-wave observations of binary black holes (BBHs) are prime candidates, since we expect the astrophysical …
View article: Parameter estimation bias from overlapping binary black hole events in second generation interferometers
Parameter estimation bias from overlapping binary black hole events in second generation interferometers Open
Since the initial detection of Gravitational Waves in 2015, 50 candidate events have been reported by the LIGO-Virgo-KAGRA collaboration. As the current generation of detectors move towards their design sensitivity the rate of these detect…
View article: Density estimation with Gaussian processes for gravitational wave posteriors
Density estimation with Gaussian processes for gravitational wave posteriors Open
The properties of black hole and neutron-star binaries are extracted from gravitational waves (GW) signals using Bayesian inference. This involves evaluating a multidimensional posterior probability function with stochastic sampling. The m…
View article: Parameter Estimation Bias From Overlapping Binary Black Hole Events In Second Generation Interferometers
Parameter Estimation Bias From Overlapping Binary Black Hole Events In Second Generation Interferometers Open
Since the initial detection of Gravitational Waves in 2015, 50 candidate events have been reported by the LIGO-Virgo-KAGRA collaboration. As the current generation of detectors move towards their design sensitivity the rate of these detect…
View article: Direct limits for scalar field dark matter from a gravitational-wave detector
Direct limits for scalar field dark matter from a gravitational-wave detector Open
The nature of dark matter remains unknown to date and several candidate particles are being considered in a dynamically changing research landscape [1]. Scalar field dark matter is a prominent option that is being explored with precision i…
View article: Direct limits for scalar field dark matter from a gravitational-wave detector
Direct limits for scalar field dark matter from a gravitational-wave detector Open
The nature of dark matter remains unknown to date; several candidate particles are being considered in a dynamically changing research landscape. Scalar field dark matter is a prominent option that is being explored with precision instrume…
View article: Rapid parameter estimation of gravitational waves from binary neutron star coalescence using focused reduced order quadrature
Rapid parameter estimation of gravitational waves from binary neutron star coalescence using focused reduced order quadrature Open
Rapid parameter estimation of gravitational waves from binary neutron star\ncoalescence, in particular accurate sky localisation in minutes after the\ninitial detection stage, is crucial for the success of multi-messenger\nobservations. On…
View article: PyROQ: a Python-based Reduced Order Quadrature Building Code for Fast Gravitational Wave Inference
PyROQ: a Python-based Reduced Order Quadrature Building Code for Fast Gravitational Wave Inference Open
The next generation of gravitational-wave observatories will reach low frequency limits on the orders of a few Hz, thus enabling the detection of gravitational wave signals of very long duration. The run time of standard parameter estimati…
View article: Bayesian inference for compact binary coalescences with <scp>bilby</scp>: validation and application to the first LIGO–Virgo gravitational-wave transient catalogue
Bayesian inference for compact binary coalescences with <span>bilby</span>: validation and application to the first LIGO–Virgo gravitational-wave transient catalogue Open
Gravitational waves provide a unique tool for observational astronomy. While the first LIGO–Virgo catalogue of gravitational-wave transients (GWTC-1) contains 11 signals from black hole and neutron star binaries, the number of observations…
View article: Parameter estimation with a spinning multimode waveform model
Parameter estimation with a spinning multimode waveform model Open
Gravitational waves from compact binary coalescence sources can be decomposed into spherical-harmonic multipoles, the dominant being the quadrupole ($\ell=2, m=\pm2$) modes. The contribution of sub-dominant modes towards total signal power…
View article: Prompt and accurate sky localization of gravitational-wave sources
Prompt and accurate sky localization of gravitational-wave sources Open
Accurate, precise and prompt sky localization of gravitational-wave sources is essential to the success of multi-messenger astronomy. One of the most accurate sky localizations we can obtain is from full signal parameter estimation obtaine…
View article: Measuring the neutron star equation of state with gravitational waves: The first forty binary neutron star merger observations
Measuring the neutron star equation of state with gravitational waves: The first forty binary neutron star merger observations Open
Gravitational waves from binary neutron star coalescences contain rich information about matter at supranuclear densities encoded by the neutron star equation of state. We can measure the equation of state by analyzing the tidal interactio…
View article: On the properties of the massive binary black hole merger GW170729
On the properties of the massive binary black hole merger GW170729 Open
© 2019 American Physical Society. We present a detailed investigation into the properties of GW170729, the gravitational wave with the most massive and distant source confirmed to date. We employ an extensive set of waveform models, includ…
View article: PyCBC Inference: A Python-based Parameter Estimation Toolkit for Compact Binary Coalescence Signals
PyCBC Inference: A Python-based Parameter Estimation Toolkit for Compact Binary Coalescence Signals Open
We introduce new modules in the open-source PyCBC gravitational- wave\nastronomy toolkit that implement Bayesian inference for compact-object binary\nmergers. We review the Bayesian inference methods implemented and describe the\nstructure…
View article: Black-hole spectroscopy by making full use of gravitational-wave modeling
Black-hole spectroscopy by making full use of gravitational-wave modeling Open
The Kerr nature of a compact-object-coalescence remnant can be unveiled by\nobserving multiple quasi-normal modes (QNMs) in the post-merger signal. Current\nmethods to achieve this goal rely on matching the data with a superposition of\nex…
View article: Mitigation of the instrumental noise transient in gravitational-wave data surrounding GW170817
Mitigation of the instrumental noise transient in gravitational-wave data surrounding GW170817 Open
In the coming years gravitational-wave detectors will undergo a series of improvements, with an increase in their detection rate by about an order of magnitude. Routine detections of gravitational-wave signals promote novel astrophysical a…