Publications (43)
A robust machine learning algorithm to search for continuous gravitational waves
Joseph Bayley, Chris Messenger, Graham Woan
Many continuous gravitational wave searches are affected by instrumental spectral lines that could be confused with a continuous astrophysical signal. Several techniques have been…
Binary Neutron Star Mergers and Third Generation Detectors: Localization and Early Warning
Man Leong Chan, Chris Messenger, Ik Siong Heng +1
For third generation gravitational wave detectors, such as the Einstein Telescope, gravitational wave signals from binary neutron stars can last up to a few days before the neutron…
Quantum state preparation of gravitational waves
Fergus Hayes, Sarah Croke, Chris Messenger +1
We detail a quantum circuit capable of efficiently encoding analytical approximations to gravitational wave signal waveforms of compact binary coalescences into the amplitudes of q…
Strategies for the Follow-up of Gravitational Wave Transients with the Cherenkov Telescope Array
Imre Bartos, Tristano Di Girolamo, Jonathan R. Gair +10
The observation of the electromagnetic counterpart of gravitational-wave (GW) transient GW170817 demonstrated the potential in extracting astrophysical information from multimessen…
The long-term evolution of the accreting millisecond X-ray pulsar Swift J1756.9-2508
Alessandro Patruno, Diego Altamirano, Chris Messenger
We present a timing analysis of the 2009 outburst of the accreting millisecond X-ray pulsar Swift J1756.9-2508, and a re-analysis of the 2007 outburst. The source shows a short rec…
Search method for long-duration gravitational-wave transients from neutron stars
Reinhard Prix, Stefanos Giampanis, Chris Messenger
We introduce a search method for a new class of gravitational-wave signals, namely long-duration O(hours - weeks) transients from spinning neutron stars. We discuss the astrophysic…
Measuring a cosmological distance-redshift relationship using only gravitational wave observations of binary neutron star coalescences
Chris Messenger, Jocelyn Read
Detection of gravitational waves from the inspiral phase of binary neutron star coalescence will allow us to measure the effects of the tidal coupling in such systems. These effect…
Efficacy of Image Similarity as a Metric for Augmenting Small Dataset Retinal Image Segmentation
Thomas Wallace, Ik Siong Heng, Senad Subasic +1
Synthetic images are an option for augmenting limited medical imaging datasets to improve the performance of various machine learning models. A common metric for evaluating synthet…
Reconstructing source motion from gravitational wave strain
Joseph Bayley, Chris Messenger, Graham Woan
Searches for un-modelled burst gravitational wave signals return potential candidates for short duration signals. As there is no clear model for the source in these searches, one n…
MLGWSC-1: The first Machine Learning Gravitational-Wave Search Mock Data Challenge
Marlin B. Schäfer, OndÅej Zelenka, Alexander H. Nitz +20
We present the results of the first Machine Learning Gravitational-Wave Search Mock Data Challenge (MLGWSC-1). For this challenge, participating groups had to identify gravitationa…
Accretion-induced spin-wandering effects on the neutron star in Scorpius X-1: Implications for continuous gravitational wave searches
Arunava Mukherjee, Chris Messenger, Keith Riles
The LIGO's discovery of binary black hole mergers has opened up a new era of transient gravitational wave astronomy. The potential detection of gravitational radiation from another…
Is there potential complementarity between LISA and pulsar timing?
Matthew Pitkin, James Clark, Martin A. Hendry +4
We open the discussion into how the Laser Interferometer Space Antenna (LISA) observations of supermassive black-hole (SMBH) mergers (in the mass range ~10^6-10^8 Msun) may be comp…
Detection and Classification of Supernova Gravitational Waves Signals: A Deep Learning Approach
Man Leong Chan, Ik Siong Heng, Chris Messenger
We demonstrate the application of a convolutional neural network to the gravitational wave signals from core collapse supernovae. Using simulated time series of gravitational wave…
Matching matched filtering with deep networks in gravitational-wave astronomy
Hunter Gabbard, Michael Williams, Fergus Hayes +1
We report on the construction of a deep convolutional neural network that can reproduce the sensitivity of a matched-filtering search for binary black hole gravitational-wave signa…
Data Analysis Methods for Testing Alternative Theories of Gravity with LISA Pathfinder
Natalia Korsakova, Chris Messenger, Francesco Pannarale +2
In this paper we present a data analysis approach applicable to the potential saddle-point fly-by mission extension of LISA Pathfinder (LPF). At the peak of its sensitivity, LPF wi…
A Pixelated Approach to Galaxy Catalogue Incompleteness: Improving the Dark Siren Measurement of the Hubble Constant
Rachel Gray, Chris Messenger, John Veitch
The use of gravitational wave standard sirens for cosmological analyses is becoming well known, with particular interest in measuring the Hubble constant, , and in shedding li…
Searching for gravitational waves from stellar-mass binary black holes early inspiral
Xue-Ting Zhang, Natalia Korsakova, Man Leong Chan +2
The early inspiral from stellar-mass binary black holes (sBBHs) can emit milli-Hertz gravitational wave signals, making them detectable sources for space-borne gravitational wave m…
Nested Sampling with Normalising Flows for Gravitational-Wave Inference
Michael J. Williams, John Veitch, Chris Messenger
We present a novel method for sampling iso-likelihood contours in nested sampling using a type of machine learning algorithm known as normalising flows and incorporate it into our…
Rapid parameter estimation for an all-sky continuous gravitational wave search using conditional varitational auto-encoders
Joseph Bayley, Chris Messenger, Graham Woan
All-sky searches for continuous gravitational waves are generally model dependent and computationally costly to run. By contrast, SOAP is a model-agnostic search that rapidly retur…
Host redshifts from gravitational-wave observations of binary neutron star mergers
Chris Messenger, Kentaro Takami, Sarah Gossan +2
Inspiralling compact binaries as standard sirens will soon become an invaluable tool for cosmology when advanced interferometric gravitational-wave detectors begin their observatio…
Bayesian parameter estimation using conditional variational autoencoders for gravitational-wave astronomy
Hunter Gabbard, Chris Messenger, Ik Siong Heng +2
Gravitational wave (GW) detection is now commonplace and as the sensitivity of the global network of GW detectors improves, we will observe s of transient GW even…
Inference on white dwarf binary systems using the first round Mock LISA Data Challenges data sets
Alexander Stroeer, John Veitch, Christian Roever +11
We report on the analysis of selected single source data sets from the first round of the Mock LISA Data Challenges (MLDC) for white dwarf binaries. We implemented an end-to-end pi…
Pre-localization of Massive Black Hole Binaries in the Millihertz Band
Xue-Ting Zhang, Jonathan Gair, Chris Messenger +3
The space-borne gravitational-wave (GW) detectors will open a new mass and redshift regime, allowing us to observe massive black hole binaries (MBHBs) throughout the Universe. A su…
Inference on inspiral signals using LISA MLDC data
Christian Röver, Alexander Stroeer, Ed Bloomer +11
In this paper we describe a Bayesian inference framework for analysis of data obtained by LISA. We set up a model for binary inspiral signals as defined for the Mock LISA Data Chal…
SOAP: A generalised application of the Viterbi algorithm to searches for continuous gravitational-wave signals
Joe Bayley, Graham Woan, Chris Messenger
All-sky and wide parameter space searches for continuous gravitational waves are generally template-matching schemes which test a bank of signal waveforms against data from a gravi…
Systematic errors in estimation of gravitational-wave candidate significance
Collin Capano, Thomas Dent, Chad Hanna +4
The statistical significance of a candidate gravitational-wave (GW) event is crucial to the prospects for a confirmed detection, or for its selection as a candidate for follow-up e…
A quantum algorithm for gravitational wave matched filtering
Sijia Gao, Fergus Hayes, Sarah Croke +2
Quantum computational devices, currently under development, have the potential to accelerate data analysis techniques beyond the ability of any classical algorithm. We propose the…
Systematic errors in estimation of gravitational-wave candidate significance
Collin Capano, Thomas Dent, Chad Hanna +4
We investigate the issue in determining the significance of candidate transient gravitational-wave events in a ground-based interferometer network. Given the presence of non-Gaussi…
Bayesian versus frequentist upper limits
Christian Röver, Chris Messenger, Reinhard Prix
While gravitational waves have not yet been measured directly, data analysis from detection experiments commonly includes an upper limit statement. Such upper limits may be derived…
A semi-coherent search strategy for known continuous wave sources in binary systems
Chris Messenger
We present a method for detection of weak continuous signals from sources in binary systems via the incoherent combination of many "short" coherently-analyzed segments. The main fo…
Exploring the sky localization and early warning capabilities of third generation gravitational wave detectors in three-detector network configurations
Yufeng Li, Ik Siong Heng, Man Leong Chan +2
This work characterises the sky localization and early warning performance of networks of third generation gravitational wave detectors, consisting of different combinations of det…
Enhancing the sensitivity of transient gravitational wave searches with Gaussian Mixture Models
V. Gayathri, Dixeena Lopez, R. S. Pranjal +3
Identifying the presence of a gravitational wave transient buried in non-stationary, non-Gaussian noise which can often contain spurious noise transients (glitches) is a very chall…
A semi-coherent search for weak pulsations in Aql X-1
Chris Messenger, Alessandro Patruno
Non pulsating neutron stars in low mass X-ray binaries largely outnumber those that show pulsations. The lack of detectable pulses represents a big open problem for two important r…
Markov Chain Monte Carlo Estimation of Quantum States
James DiGuglielmo, Chris Messenger, Jaromir Fiurasek +4
We apply a Bayesian data analysis scheme known as the Markov Chain Monte Carlo (MCMC) to the tomographic reconstruction of quantum states. This method yields a vector, known as the…
Utilizing Gaussian mixture models in all-sky searches for short-duration gravitational wave bursts
Dixeena Lopez, V. Gayathri, Archana Pai +3
Coherent WaveBurst is a generic, multidetector gravitational wave burst search based on the excess power approach. The coherent WaveBurst algorithm currently employed in the all-sk…
Detecting Gravitational-waves from Extreme Mass Ratio Inspirals using Convolutional Neural Networks
Xue-Ting Zhang, Chris Messenger, Natalia Korsakova +3
Extreme mass ratio inspirals (EMRIs) are among the most interesting gravitational wave (GW) sources for space-borne GW detectors. However, successful GW data analysis remains chall…
Deep-Learning continuous gravitational waves
Christoph Dreissigacker, Rahul Sharma, Chris Messenger +2
We present a first proof-of-principle study for using deep neural networks (DNNs) as a novel search method for continuous gravitational waves (CWs) from unknown spinning neutron st…
Maximising the detection probability of kilonovae associated with gravitational wave observations
Man Leong Chan, Yi-Ming Hu, Chris Messenger +2
Estimates of the source sky location for gravitational wave signals are likely span areas ranging up to hundreds of square degrees or more, making it very challenging for most tele…
Are stellar--mass binary black hole mergers isotropically distributed?
Richard Stiskalek, John Veitch, Chris Messenger
The Advanced LIGO and Advanced Virgo gravitational wave detectors have detected a population of binary black hole mergers in their first two observing runs. For each of these event…
Deep searches for X-ray pulsations from Scorpius X-1 and Cygnus X-2 in support of continuous gravitational wave searches
Shanika Galaudage, Karl Wette, Duncan K. Galloway +1
Neutron stars in low mass X-ray binaries are hypothesised to emit continuous gravitational waves that may be detectable by ground-based observatories. The torque balance model pred…
Importance nested sampling with normalising flows
Michael J. Williams, John Veitch, Chris Messenger
We present an improved version of the nested sampling algorithm nessai in which the core algorithm is modified to use importance weights. In the modified algorithm, samples are dra…
Report on the second Mock LISA Data Challenge
Stanislav Babak, John G. Baker, Matthew J. Benacquista +40
The Mock LISA Data Challenges are a program to demonstrate LISA data-analysis capabilities and to encourage their development. Each round of challenges consists of several data set…
Cosmological inference using only gravitational wave observations of binary neutron stars
Walter Del Pozzo, Tjonnie G. F. Li, Chris Messenger
[Abridged] This study presents the first Bayesian investigation of the accuracy with which the cosmological parameters can be measured using information coming \emph{only} from the…