Variable placement of templates technique in a 2D parameter space for binary inspiral searches

TL;DR

This paper introduces a novel template placement technique for binary inspiral searches in gravitational wave detectors, reducing the number of templates needed by exploiting variations in isomatch ellipse sizes, thus improving computational efficiency.

Contribution

The paper presents an original variable placement method that adapts to ellipse size variations, decreasing template count and computational cost in gravitational wave data analysis.

Findings

Improves coverage efficiency by 6-30% compared to simple tiling.

Reduces the number of templates needed for parameter space coverage.

Maintains acceptable match quality with minimal coverage holes.

Abstract

In the search for binary systems inspiral signal in interferometric gravitational waves detectors, one needs the generation and placement of a grid of templates. We present an original technique for the placement in the associated parameter space, that makes use of the variation of size of the isomatch ellipses in order to reduce the number of templates necessary to cover the parameter space. This technique avoids the potentially expensive computation of the metric at every point, at the cost of having a small number of ``holes'' in the coverage, representing a few percent of the surface of the parameter space, where the match is slightly lower than specified. A study of the covering efficiency, as well as a comparison with a very simple regular tiling using a single ellipse is made. Simulations show an improvement varying between 6% and 30% for the computing cost in this comparison.