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A new waveform consistency test for gravitational wave inspiral searches

Shawhan, Peter and Ochsner, Evan (2004) A new waveform consistency test for gravitational wave inspiral searches. Classical and Quantum Gravity, 21 (20). S1757-S1765. ISSN 0264-9381. http://resolver.caltech.edu/CaltechAUTHORS:SHAcqg04

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Abstract

Searches for binary inspiral signals in data collected by interferometric gravitational wave detectors utilize matched filtering techniques. Although matched filtering is optimal in the case of stationary Gaussian noise, data from real detectors often contain 'glitches' and episodes of excess noise which cause filter outputs to ring strongly. We review the standard χ2 statistic which is used to test whether the filter output has appropriate contributions from several different frequency bands. We then propose a new type of waveform consistency test which is based on the time history of the filter output. We apply one such test to the data from the first LIGO science run and show that it cleanly distinguishes between true inspiral waveforms and large-amplitude false signals which managed to pass the standard χ2 test. Future searches may benefit significantly from applying this new type of waveform consistency test in addition to the standard χ2 test.


Item Type:Article
Additional Information:Copyright © Institute of Physics and IOP Publishing Limited 2004. Received 15 April 2004; Published 28 September 2004; Print publication: Issue 20 (21 October 2004). We thank Alan Weinstein for useful suggestions and Duncan Brown for helping us to rerun the inspiral search on the LIGO S1 data. We also thank the referees for helping us to clarify a number of points. This work was supported by the National Science Foundation through Cooperative Agreement PHY-0107417 and through the Research Experiences for Undergraduates (REU) programmes. Special issue: Proceedings of the 8th Gravitational Wave Data Analysis Workshop, Milwaukee, WI, USA, 17-20 December 2003, Classical and Quantum Gravity Volume 21, Number 20, 21 October 2004
Record Number:CaltechAUTHORS:SHAcqg04
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:SHAcqg04
Alternative URL:http://dx.doi.org/10.1088/0264-9381/21/20/018
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:6529
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:12 Dec 2006
Last Modified:25 Feb 2014 23:12

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