1,721,722 research outputs found
Data analysis challenges in transient gravitational-wave astronomy
No full textGravitational waves are radiative solutions of space-time dynamics predicted by Einstein's theory of General Relativity. A world-wide array of large-scale and highly sensitive interferometric detectors constantly scrutinizes the geometry of the local space-time with the hope to detect deviations that would signal an impinging gravitational wave from a remote astrophysical source. Finding the rare and weak signature of gravitational waves buried in non-stationary and non-Gaussian instrument noise is a particularly challenging problem. We will give an overview of the data analysis techniques and associated observational results obtained so far by Virgo (in Europe) and LIGO (in the US), along with the prospects offered by the upcoming advanced versions of those detectors. © 2013 AIP Publishing LLC
Testing the normality of the gravitational wave data with a low cost recursive estimate of the kurtosis
No full text4 pages, 3 figures. In the Proceedings of the 3rd workshop on Physics in Signal and Image Processing (Grenoble), 2003We propose a monitoring indicator of the normality of the output of a gravitational wave detector. This indicator is based on the estimation of the kurtosis (i.e., the 4th order statistical moment normalized by the variance squared) of the data selected in a time sliding window. We show how a low cost (because recursive) implementation of such estimation is possible and we illustrate the validity of the presented approach with a few examples using simulated random noises
Testing normality of gravitational wave data with a low cost recursive estimate of the kurtosis
No full textIn Proc. of PSIP2003, pp. 157-160, 2003, 2003International audienc
Joint searches for gravitational waves and high-energy neutrinos
No full textInternational audienceMany of the astrophysical sources and violent phenomena observed in our Universe are potential joint emitters of gravitational waves and high-energy cosmic radiation, in the form of photons, hadrons, and also neutrinos. This has triggered a collaborative analysis project between gravitational wave detectors and high-energy neutrino telescopes. In this article, we review some of the motivations for having pursuing science jointly and present the effort's status
Détection temps-fréquence et réallocation
No full textTraité IC2 Décision dans le plan temps-fréquence, éd. par N. Martin et C. Doncarli. Hermes, pp. 103-126, 2004, 200
Analyse temps-fréquence quadratique I : la classe de Cohen
No full textIn Traité IC2 Temps-fréquence : concepts et outils, ed. par F. Hlawatsch and F. Auger. Hermes, pp. 139-172, 2005, 200
On the time-frequency detection of chirps
No full textAppl. Comp. Harm. Anal., vol. 6, n. 9, pp. 252-281, 2001, 2001International audienc
Adaptive filtering techniques for interferometric data preparation: removal of long-term sinusoidal signals and oscillatory transients
No full textWe propose an adaptive denoising scheme for poorly modeled non-Gaussian features in the gravitational wave interferometric data. Preliminary tests on real data show encouraging results
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