Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21540610l&link_type=abstract
American Astronomical Society, AAS Meeting #215, #406.10; Bulletin of the American Astronomical Society, Vol. 42, p.231
Astronomy and Astrophysics
Astrophysics
Scientific paper
Central to the gravitational wave detection problem is the challenge of distinguishing between instrumental and astrophysical features in the data. While this capability has been demonstrated for gaussian noise, transient noise excursions, or ``glitches'' remain problematic. While detector diagnostics and coincidence tests can reject most glitches which may be considered gravitational wave events, a procedure which robustly differentiates the two is desirable. We have developed an approach which coherently fits to noise excursions without degrading the underlying gravitational wave signal. The principal feature is the use of wavelets as ``glitch templates'' to match the non-gaussian components of the noise, the number of which is determined by a trans-dimensional Markov chain Monte Carlo. We demonstrate the method's effectiveness on simulated data containing low amplitude gravitational wave signals from inspiraling binary black hole systems, gaussian noise in accordance with the LIGO/Virgo network of detectors, and injected ``glitches'' of various amplitude, prevalence, and variety.
Cornish Neil J.
Littenberg Tyson
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