First detection of gravitational waves
On the 11th of February 2016, the Virgo and LIGO collaboration announced the first detection of a gravitational wave. It has been produced by a system of two black holes…
Articles produced by the « Gravitational waves » group
Observation of Gravitational Waves from a Binary Black Hole Merger
Abstract: On September 14, 2015 at 09:50:45 UTC the two detectors of the Laser Interferometer Gravitational-Wave Observatory simultaneously observed a transient gravitational-wave signal. The signal sweeps upwards in frequency from…
Institut de France Award Ceremony
In 2015, Patrice Hello and the Virgo-LAL group were rewarded by the grand prix scientifique de la Fondation Simone et Cino Del Duca. For this occasion, the group went to…
Improved constraint on the primordial gravitational-wave density using recent cosmological data and its impact on cosmic string models
Abstract: (IOP) The production of a primordial stochastic gravitational-wave (GW) background by processes occuring in the early Universe is expected in a broad range of models. Observing this background would…
Performance of a thermally deformable mirror for correction of low-order aberrations in laser beams
Abstract The thermally deformable mirror is a device aiming at correcting beam-wavefront distortions for applications where classical mechanical methods are precluded by noise considerations, as in advanced gravitational wave interferometric…
Limitations of the time slide method of background estimation.
Abstract: (IOP) Time shifting the output of gravitational wave detectors operating in coincidence is a convenient way of estimating the background in a search for short-duration signals. In this paper,…
On the background estimation by time slides in a network of gravitational wave detectors.
Abstract: (arXiv) 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. This procedure…
EGC: A time-frequency augmented template-based method for gravitational wave burst search in ground-based interferometers.
Abstract: (IOP) The detection of burst-type events in the output of ground gravitational wave detectors is particularly challenging. The potential variety of astrophysical waveforms, as proposed by simulations and analytic…
Reconstruction of source location in a network of gravitational wave interferometric detectors.
Abstract: (arXiv) This paper deals with the reconstruction of the direction of a gravitational wave source using the detection made by a network of interferometric detectors, mainly the LIGO and…