Sparse sky grid for the coherent detection of gravitational wave bursts
arXiv:0905.4832
Abstract
The gravitational wave detectors currently in operation perform the analysis of their scientific data jointly. Concerning the search for bursting sources, coherent data analysis methods have been shown to be more efficient. In the coherent approach, the data collected by the detectors are time-shifted and linearly combined so that the signatures received by each detector add up constructively (thus improving the resulting signal-to-noise ratio). This operation has to be performed over a sky grid (which determines the sky locations to be searched). A limitation of those pipelines is their large computing cost. One of the available degrees of freedom to reduce the cost is the choice of the sky grid. Ideally, the sky sampling scheme should adapt the angular resolution associated with the considered gravitational wave detector network. As the geometry of detector network is not regular (the detectors are not equally spaced and oriented), the angular resolution varies largely depending on the sky location. We propose here a procedure which designs sky grids that permit a complete sky coverage with a minimum number of vertices and thus adapt the local resolution.
20 pages,8 figures, submitted to CQG
References in corpus (9)
- A data-analysis strategy for detecting gravitational-wave signals from inspiraling compact binaries with a network of laser-interferometric detectors
- Coherent network analysis technique for discriminating gravitational-wave bursts from instrumental noise
- LOOC UP: Locating and observing optical counterparts to gravitational wave bursts
- Coincidence and coherent data analysis methods for gravitational wave bursts in a network of interferometric detectors
- An elliptical tiling method to generate a 2-dimensional set of templates for gravitational wave search
- Gravitational Wave Burst Source Direction Estimation using Time and Amplitude Information
- Best network chirplet-chain: Near-optimal coherent detection of unmodeled gravitation wave chirps with a network of detectors
- Variable placement of templates technique in a 2D parameter space for binary inspiral searches
- Coincidence detection of broadband signals by networks of the planned interferometric gravitational wave detectors