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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Evidence-based search method for gravitational waves from neutron star ring-downs
AU - Clark, James
AU - Heng, Ik Siong
AU - Pitkin, Matthew
AU - Woan, Graham
PY - 2007
Y1 - 2007
N2 - 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 × 10−5 M⊙c2 to be emitted as gravitational waves.
AB - 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 × 10−5 M⊙c2 to be emitted as gravitational waves.
U2 - 10.1103/PhysRevD.76.043003
DO - 10.1103/PhysRevD.76.043003
M3 - Journal article
VL - 76
JO - Physical Review D
JF - Physical Review D
SN - 1550-7998
IS - 4
M1 - 043003
ER -