D. Keitel
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View article: LIGO–Virgo–KAGRA Results and Status of the Current Fourth Observing Run
LIGO–Virgo–KAGRA Results and Status of the Current Fourth Observing Run Open
The gravitational-wave window onto the Universe has been opened with the first detection of a binary black hole in 2015. Since then, the LIGO–Virgo–KAGRA Collaboration has published 90 probable detections from three complete observing runs…
View article: LensingFlow: An Automated Workflow for Gravitational Wave Lensing Analyses
LensingFlow: An Automated Workflow for Gravitational Wave Lensing Analyses Open
In this work, we present LensingFlow. This is an implementation of an automated workflow to search for evidence of gravitational lensing in a large series of gravitational wave events. This workflow conducts searches for evidence in all ge…
View article: Multi-messenger gravitational lensing
Multi-messenger gravitational lensing Open
We introduce the rapidly emerging field of multi-messenger gravitational lensing—the discovery and science of gravitationally lensed phenomena in the distant universe through the combination of multiple messengers. This is framed by gravit…
View article: Multi-messenger Gravitational Lensing
Multi-messenger Gravitational Lensing Open
We introduce the rapidly emerging field of multi-messenger gravitational lensing - the discovery and science of gravitationally lensed phenomena in the distant universe through the combination of multiple messengers. This is framed by grav…
View article: Applications of machine learning in gravitational-wave research with current interferometric detectors
Applications of machine learning in gravitational-wave research with current interferometric detectors Open
This article provides an overview of the current state of machine learning in gravitational-wave research with interferometric detectors. Such applications are often still in their early days, but have reached sufficient popularity to warr…
View article: What is the nature of GW230529? An exploration of the gravitational lensing hypothesis
What is the nature of GW230529? An exploration of the gravitational lensing hypothesis Open
On the 29th of May 2023, the LIGO–Virgo–KAGRA Collaboration observed a compact binary coalescence event consistent with a neutron star – black hole merger, though the heavier object of mass 2.5 − 4.5 M⊙ would fall into the purported lower …
View article: Applications of machine learning in gravitational wave research with current interferometric detectors
Applications of machine learning in gravitational wave research with current interferometric detectors Open
This article provides an overview of the current state of machine learning in gravitational-wave research with interferometric detectors. Such applications are often still in their early days, but have reached sufficient popularity to warr…
View article: Invariance transformations in wave-optics lensing: Implications for gravitational-wave astrophysics and cosmology
Invariance transformations in wave-optics lensing: Implications for gravitational-wave astrophysics and cosmology Open
Gravitational lensing offers unique opportunities to learn about the astrophysical origin of distant sources, the abundance of intervening objects acting as lenses, and gravity and cosmology in general. However, all this information can on…
View article: Communicating the gravitational-wave discoveries of the LIGO-Virgo-KAGRA Collaboration
Communicating the gravitational-wave discoveries of the LIGO-Virgo-KAGRA Collaboration Open
The LIGO-Virgo-KAGRA (LVK) Collaboration has made breakthrough discoveries in gravitational-wave astronomy, a new field that provides a different means of observing our Universe. Gravitational-wave discoveries are possible thanks to the wo…
View article: What is the nature of GW230529? An exploration of the gravitational lensing hypothesis
What is the nature of GW230529? An exploration of the gravitational lensing hypothesis Open
On the 29th of May 2023, the LIGO-Virgo-KAGRA Collaboration observed a compact binary coalescence event consistent with a neutron star-black hole merger, though the heavier object of mass 2.5-4.5 $M_\odot$ would fall into the purported low…
View article: Invariance transformations in wave-optics lensing: implications for gravitational-wave astrophysics and cosmology
Invariance transformations in wave-optics lensing: implications for gravitational-wave astrophysics and cosmology Open
Gravitational lensing offers unique opportunities to learn about the astrophysical origin of distant sources, the abundance of intervening objects acting as lenses, and gravity and cosmology in general. However, all this information can on…
View article: Communicating the gravitational-wave discoveries of the LIGO-Virgo-KAGRA Collaboration
Communicating the gravitational-wave discoveries of the LIGO-Virgo-KAGRA Collaboration Open
The LIGO-Virgo-KAGRA (LVK) Collaboration has made breakthrough discoveries in gravitational-wave astronomy, a new field that provides a different means of observing our Universe. Gravitational-wave discoveries are possible thanks to the wo…
View article: False positives for gravitational lensing: the gravitational-wave perspective
False positives for gravitational lensing: the gravitational-wave perspective Open
For the first detection of a novel astrophysical phenomenon, scientific standards are particularly high. Especially in a multi-messenger context, there are also opportunity costs to follow-up observations on any detection claims. So in sea…
View article: ler : LVK (LIGO-Virgo-KAGRA collaboration) event (compact-binary mergers) rate calculator and simulator
ler : LVK (LIGO-Virgo-KAGRA collaboration) event (compact-binary mergers) rate calculator and simulator Open
'$ler$' is a statistics-based Python package specifically designed for computing detectable rates of both lensed and unlensed GW events, catering to the requirements of the LIGO-Virgo-KAGRA Scientific Collaboration and astrophysics researc…
View article: Waveform systematics in identifying strongly gravitationally lensed gravitational waves: posterior overlap method
Waveform systematics in identifying strongly gravitationally lensed gravitational waves: posterior overlap method Open
Gravitational lensing has been extensively observed for electromagnetic signals, but not yet for gravitational waves (GWs). Detecting lensed GWs will have many astrophysical and cosmological applications, and becomes more feasible as the s…
View article: Parameter estimation data release for paper "Waveform systematics in identifying gravitationally lensed gravitational waves: Posterior overlap method"
Parameter estimation data release for paper "Waveform systematics in identifying gravitationally lensed gravitational waves: Posterior overlap method" Open
This is a second data release for the paper "Waveform systematics in identifying gravitationally lensed gravitational waves: Posterior overlap method", which is available on https://arxiv.org/abs/2306.12908. This data release contains post…
View article: Parameter estimation data release for paper "Waveform systematics in identifying gravitationally lensed gravitational waves: Posterior overlap method"
Parameter estimation data release for paper "Waveform systematics in identifying gravitationally lensed gravitational waves: Posterior overlap method" Open
This is a second data release for the paper "Waveform systematics in identifying gravitationally lensed gravitational waves: Posterior overlap method", which is available on https://arxiv.org/abs/2306.12908. This data release contains post…
View article: Follow-up analyses to the O3 LIGO–Virgo–KAGRA lensing searches
Follow-up analyses to the O3 LIGO–Virgo–KAGRA lensing searches Open
Along their path from source to observer, gravitational waves may be gravitationally lensed by massive objects leading to distortion in the signals. Searches for these distortions amongst the observed signals from the current detector netw…
View article: Convolutional neural network search for long-duration transient gravitational waves from glitching pulsars
Convolutional neural network search for long-duration transient gravitational waves from glitching pulsars Open
Machine learning can be a powerful tool to discover new signal types in astronomical data. We here apply it to search for long-duration transient gravitational waves triggered by pulsar glitches, which could yield physical insight into the…
View article: Data release for paper "Waveform systematics in identifying gravitationally lensed gravitational waves: Posterior overlap method"
Data release for paper "Waveform systematics in identifying gravitationally lensed gravitational waves: Posterior overlap method" Open
This is the data release for the paper "Waveform systematics in identifying gravitationally lensed gravitational waves: Posterior overlap method", which is available on https://arxiv.org/abs/2306.12908. These results are derived from the g…
View article: Data release for paper "Waveform systematics in identifying gravitationally lensed gravitational waves: Posterior overlap method"
Data release for paper "Waveform systematics in identifying gravitationally lensed gravitational waves: Posterior overlap method" Open
This is the data release for the paper "Waveform systematics in identifying gravitationally lensed gravitational waves: Posterior overlap method", which is available on https://arxiv.org/abs/2306.12908. These results are derived from the g…
View article: Waveform systematics in identifying strongly gravitationally lensed gravitational waves: Posterior overlap method
Waveform systematics in identifying strongly gravitationally lensed gravitational waves: Posterior overlap method Open
Gravitational lensing has been extensively observed for electromagnetic signals, but not yet for gravitational waves (GWs). Detecting lensed GWs will have many astrophysical and cosmological applications, and becomes more feasible as the s…
View article: Follow-up Analyses to the O3 LIGO-Virgo-KAGRA Lensing Searches
Follow-up Analyses to the O3 LIGO-Virgo-KAGRA Lensing Searches Open
Along their path from source to observer, gravitational waves may be gravitationally lensed by massive objects. This results in distortions of the observed signal which can be used to extract new information about fundamental physics, astr…
View article: Search for Gravitational Waves from Scorpius X-1 in LIGO O3 Data with Corrected Orbital Ephemeris
Search for Gravitational Waves from Scorpius X-1 in LIGO O3 Data with Corrected Orbital Ephemeris Open
Improved observational constraints on the orbital parameters of the low-mass X-ray binary Scorpius X-1 were recently published in Killestein et al. In the process, errors were corrected in previous orbital ephemerides, which have been used…
View article: Convolutional neural network search for long-duration transient gravitational waves from glitching pulsars
Convolutional neural network search for long-duration transient gravitational waves from glitching pulsars Open
Machine learning can be a powerful tool to discover new signal types in astronomical data. We here apply it to search for long-duration transient gravitational waves triggered by pulsar glitches, which could yield physical insight into the…
View article: Search for Gravitational Waves from Scorpius X-1 in LIGO O3 Data With Corrected Orbital Ephemeris
Search for Gravitational Waves from Scorpius X-1 in LIGO O3 Data With Corrected Orbital Ephemeris Open
Improved observational constraints on the orbital parameters of the low-mass X-ray binary Scorpius~X-1 were recently published in Killestein et al (2023). In the process, errors were corrected in previous orbital ephemerides, which have be…
View article: Prospects for detecting and localizing short-duration transient gravitational waves from glitching neutron stars without electromagnetic counterparts
Prospects for detecting and localizing short-duration transient gravitational waves from glitching neutron stars without electromagnetic counterparts Open
Neutron stars are known to show accelerated spin-up of their rotational frequency called a glitch. Highly magnetized rotating neutron stars (pulsars) are frequently observed by radio telescopes (and in other frequencies), where the glitch …
View article: Prospects for detecting transient quasi-monochromatic gravitational waves from glitching pulsars with current and future detectors
Prospects for detecting transient quasi-monochromatic gravitational waves from glitching pulsars with current and future detectors Open
Pulsars are rotating neutron stars that emit periodic electromagnetic radiation. While pulsars generally slow down as they lose energy, some also experience glitches: spontaneous increases of their rotational frequency. According to severa…
View article: Parameter estimation with the current generation of phenomenological waveform models applied to the black hole mergers of GWTC-1
Parameter estimation with the current generation of phenomenological waveform models applied to the black hole mergers of GWTC-1 Open
We consider the 10 confidently detected gravitational-wave signals in the GWTC-1 catalog, which are consistent with mergers of binary black hole systems, and perform a thorough parameter estimation re-analysis. This is made possible by usi…
View article: Prospects for detecting and localizing short-duration transient\n gravitational waves from glitching neutron stars without electromagnetic\n counterparts
Prospects for detecting and localizing short-duration transient\n gravitational waves from glitching neutron stars without electromagnetic\n counterparts Open
Neutron stars are known to show accelerated spin-up of their rotational\nfrequency called a glitch. Highly magnetized rotating neutron stars (pulsars)\nare frequently observed by radio telescopes (and in other frequencies), where\nthe glit…