Chi-square test on candidate events from CW signal coherent searches

Details Chi-square test on candidate events from CW signal coherent searches Chi-square test on candidate events from CW signal coherent searches

2004-08-29

arxiv.org/abs/gr-qc/0408092v1

Class.Quant.Grav. 21 (2004) S1667-S1678

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

proceedings of GWDAW8, 2003 conference, 12pages, 6 figures

Scientific paper

10.1088/0264-9381/21/20/009

In a blind search for continuous gravitational wave signals scanning a wide frequency band one looks for candidate events with significantly large values of the detection statistic. Unfortunately, a noise line in the data may also produce a moderately large detection statistic. In this paper, we describe how we can distinguish between noise line events and actual continuous wave (CW) signals, based on the shape of the detection statistic as a function of the signal's frequency. We will analyze the case of a particular detection statistic, the F statistic, proposed by Jaranowski, Krolak, and Schutz. We will show that for a broad-band 10 hour search, with a false dismissal rate smaller than 1e-6, our method rejects about 70 % of the large candidate events found in a typical data set from the second science run of the Hanford LIGO interferometer.

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