Seedless clustering in all-sky searches for gravitational-wave transients

Eric Thrane, Michael William Coughlin

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22 Citations (Scopus)

Abstract

The problem of searching for unmodeled gravitational-wave bursts can be thought of as a pattern recognition problem: how to find statistically significant clusters in spectrograms of strain power when the precise signal morphology is unknown. In a previous publication, we showed how “seedless clustering” can be used to dramatically improve the sensitivity of searches for long-lived (∼10–1000  s) gravitational-wave transients. To manage the computational costs, this initial analysis focused on externally triggered searches where the source location and emission time are both known to some degree of precision. In this paper, we show how the principle of seedless clustering can be extended to facilitate computationally feasible, all-sky searches where the direction and emission time of the source are entirely unknown. We further demonstrate that it is possible to achieve a considerable reduction in computation time by using graphical processor units, thereby facilitating more sensitive searches.
Original languageEnglish
Article number063012
Number of pages9
JournalPhysical Review D
Volume89
Issue number6
DOIs
Publication statusPublished - 2014
Externally publishedYes

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