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A new glitch-rejection algorithm forged in the spherical harmonic basis

Edwards, Mark and Sutton, Patrick J. 2012. A new glitch-rejection algorithm forged in the spherical harmonic basis. Journal of Physics: Conference Series 363 , 012025. 10.1088/1742-6596/363/1/012025

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The noise in the output of a gravitational-wave interferometer is known not to be due to stationary Gaussian processes. In fact, even after whitening, it will contain spikes of very large power (called glitches), due to environmental disturbances, instabilities in detector systems, and other factors. These glitches can sometimes mimic, and, due to their loudness, obfuscate real signals close in time. In this article we outline a new method of discriminating these glitches from gravitational-wave signals which works on the principle of the spherical harmonic decomposition of the correlation of the data streams in the detector network. It is intrinsically a coherent all-sky method (working, as it does, in the spherical harmonic domain) which can produce a time-series showing the glitchiness of the underlying data. We demonstrate this spherical-harmonic technique using real interferometer data and compare it to another glitch-rejection method in current use.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Publisher: IOP Publishing
ISSN: 1742-6596
Funders: STFC
Last Modified: 18 Oct 2018 01:35

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