Publications (14)
Detection of a close supernova gravitational wave burst in a network of interferometers, neutrino and optical detectors
Nicolas Arnaud, Matteo Barsuglia, Marie-Anne Bizouard +6
Trying to detect the gravitational wave (GW) signal emitted by a type II supernova is a main challenge for the GW community. Indeed, the corresponding waveform is not accurately mo…
Improved constraint on the primordial gravitational-wave density using recent cosmological data and its impact on cosmic string models
Sophie Henrot-Versillé, Florent Robinet, Nicolas Leroy +13
The production of a primordial stochastic gravitational-wave background by processes occuring in the early Universe is expected in a broad range of models. Observing this backgroun…
Detection in coincidence of gravitational wave bursts with a network of interferometric detectors (I): Geometric acceptance and timing
Nicolas Arnaud, Matteo Barsuglia, Marie-Anne Bizouard +5
Detecting gravitational wave bursts (characterised by short durations and poorly modelled waveforms) requires to have coincidences between several interferometric detectors in orde…
Kilonova modelling and parameter inference: Understanding uncertainties and evaluating compatibility between observations and models
Thomas Hussenot-Desenonges, Marion Pillas, Sarah Antier +2
In the study of optical transients, parameter inference is the process of extracting physical information, i.e. constraints on the source's characteristics, by comparing the observ…
Coincidence and coherent data analysis methods for gravitational wave bursts in a network of interferometric detectors
Nicolas Arnaud, Matteo Barsuglia, Marie-Anne Bizouard +6
Network data analysis methods are the only way to properly separate real gravitational wave (GW) transient events from detector noise. They can be divided into two generic classes:…
Characterizing the Ordinary Broad-lined Type Ic SN 2023pel from the Energetic GRB 230812B
Gokul P. Srinivasaragavan, Vishwajeet Swain, Brendan M. O'Connor +39
We report observations of the optical counterpart of the long gamma-ray burst (LGRB) GRB 230812B, and its associated supernova (SN) SN 2023pel. The proximity () and high…
An elliptical tiling method to generate a 2-dimensional set of templates for gravitational wave search
Nicolas Arnaud, Matteo Barsuglia, Marie-Anne Bizouard +6
Searching for a signal depending on unknown parameters in a noisy background with matched filtering techniques always requires an analysis of the data with several templates in par…
Current status of gravitational-wave observations
Stephen Fairhurst, Gianluca M Guidi, Patrice Hello +2
The first generation of gravitational wave interferometric detectors has taken data at, or close to, their design sensitivity. This data has been searched for a broad range of grav…
Optimizing the low-latency localization of gravitational waves
Pierre-Alexandre Duverne, Stéphanie Hoang, Tito Dal Canton +4
Gravitational-wave data from interferometric detectors like LIGO, Virgo and KAGRA is routinely analyzed by rapid matched-filtering algorithms to detect compact binary merger events…
On the background estimation by time slides in a network of gravitational wave detectors
Michal Was, Marie-Anne Bizouard, Violette Brisson +6
Time shifting the outputs of Gravitational Wave detectors operating in coincidence is a convenient way to estimate the background in a search for short duration signals. However th…
An efficient filter for detecting gravitational wave bursts in interferometric detectors
Thierry Pradier, Nicolas Arnaud, Marie-Anne Bizouard +3
Typical sources of gravitational wave bursts are supernovae, for which no accurate models exist. This calls for search methods with high efficiency and robustness to be used in the…
ZTF25abjmnps (AT2025ulz) and S250818k: A Candidate Superkilonova from a Sub-threshold Sub-Solar Gravitational Wave Trigger
Mansi M. Kasliwal, Tomas Ahumada, Robert Stein +61
On August 18, 2025, the LIGO-Virgo-KAGRA collaboration reported gravitational waves from a sub-threshold binary neutron star merger. If astrophysical, this event would have a surpr…
Early-Time Observations of SN 2023wrk: A Luminous Type Ia Supernova with Significant Unburned Carbon in the Outer Ejecta
Jialian Liu, Xiaofeng Wang, Cristina Andrade +44
We present extensive photometric and spectroscopic observations of the nearby Type Ia supernova (SN) 2023wrk at a distance of about 40 Mpc. The earliest detection of this SN can be…
Comparison of filters for detecting gravitational wave bursts in interferometric detectors
Nicolas Arnaud, Matteo Barsuglia, Marie-Anne Bizouard +7
Filters developed in order to detect short bursts of gravitational waves in interferometric detector outputs are compared according to three main points. Conventional Receiver Oper…