Clark, J., Heng, I.S., Pitkin, M. and Woan, G. (2007) Evidence-based search method for gravitational waves from neutron star ring-downs. Physical Review D, 76(4), 043003. (doi: 10.1103/PhysRevD.76.043003)
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Abstract
The excitation of quadrupolar quasinormal modes in a neutron star leads to the emission of a short, distinctive, burst of gravitational radiation in the form of a decaying sinusoid or “ring-down.” We present a Bayesian analysis method which incorporates relevant prior information about the source and known instrumental artifacts to conduct a robust search for the gravitational wave emission associated with pulsar glitches and soft γ-ray repeater flares. Instrumental transients are modeled as sine-Gaussian and their evidence, or marginal likelihood, is compared with that of Gaussian white noise and ring-downs via the “odds-ratio.” Tests using simulated data with a noise spectral density similar to the LIGO interferometer around 1 kHz yield 50% detection efficiency and 1% false alarm probability for ring-down signals with signal-to-noise ratio ρ=5.2. For a source at 15 kpc this requires an energy of 1.3×10<sup>-5</sup>M<sub>⊙</sub>c<sup>2</sup> to be emitted as gravitational waves.
Item Type: | Articles |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Woan, Professor Graham and Heng, Professor Ik Siong and Pitkin, Dr Matthew |
Authors: | Clark, J., Heng, I.S., Pitkin, M., and Woan, G. |
College/School: | College of Science and Engineering > School of Physics and Astronomy |
Research Centre: | College of Science and Engineering > School of Physics and Astronomy > Institute for Gravitational Research |
Journal Name: | Physical Review D |
Publisher: | American Physical Society |
ISSN: | 1550-7998 |
ISSN (Online): | 1089-4918 |
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