On the search for intermediate duration gravitational waves using the spherical harmonic basis

Edwards, Mark 2013. On the search for intermediate duration gravitational waves using the spherical harmonic basis. PhD Thesis, Cardiff University. Item availability restricted.

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Abstract

The main focus of the work described here within, is the development of an analysis pipeline that can detect gravitational waves transients that have a duration from a large fraction of a second up to 100 seconds. Firstly, we will present the basic theory of gravitational waves, their generation and their detection. We will then review the current state of the art of gravitational waves transient search algorithms and their limitations. We also introduce the coherent search pipeline that has been developed from the ground up to find such intermediate length gravitational waves, and discuss in detail how it differs from other pipelines, and what makes it so well suited to this task. Further, we will describe the powerful glitch rejection algorithm and sky localisation solution that using the spherical harmonic basis made possible. Finally, we demonstrate the use of this method on real data, and compare our results against a mature pipeline.

Item Type:	Thesis (PhD)
Status:	Unpublished
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Uncontrolled Keywords:	Spherical harmonics,Decomposition,Gravitational wave, Interferometer, LIGO, LSC,VIRGO, Glitch rejection, Intermediate duration, R-modes, Accretion disc instabilities, Cannonball model, Einstein equation, Linearised theory of gravity, Data analysis, Fourier transform, Fast Spherical Harmonic Transform, FSHT, FFT, Time-series analysis, Time-frequency Coherent, Projection, Localisation, SphRad, Omega, X-Pipeline cWB, STAMP,
Funders:	STFC
Date of First Compliant Deposit:	30 March 2016
Last Modified:	19 Mar 2016 23:28
URI:	https://orca.cardiff.ac.uk/id/eprint/53498

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