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Classical and Quantum Gravity

Optimal time-domain combination of the two calibrated output quadratures of GEO 600

Author

M Hewitson 1, H Grote 1, S Hild 1, H Lück 1, P Ajith 1, J R Smith 1, K A Strain 2, B Willke 1 and G Woan 2

Affiliations

1 Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut) und Universität Hannover, Außenstelle Hannover, Callinstr. 38, 30167 Hannover, Germany
2 Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Great Britain

E-mail

martin.hewitson@aei.mpg.de

Journal

Classical and Quantum Gravity Create an alert RSS this journal

Issue

Volume 22, Number 20

Citation

M Hewitson et al 2005 Class. Quantum Grav. 22 4253

doi: 10.1088/0264-9381/22/20/007


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Abstract

GEO 600 is an interferometric gravitational wave detector with a 600 m arm-length and which uses a dual-recycled optical configuration to give enhanced sensitivity over certain frequencies in the detection band. Due to the dual-recycling, GEO 600 has two main output signals, both of which potentially contain gravitational wave signals. These two outputs are calibrated to strain using a time-domain method. In order to simplify the analysis of the GEO 600 data set, it is desirable to combine these two calibrated outputs to form a single strain signal that has optimal signal-to-noise ratio across the detection band. This paper describes a time-domain method for doing this combination. The method presented is similar to one developed for optimally combining the outputs of two colocated gravitational wave detectors. In the scheme presented in this paper, some simplifications are made to allow its implementation using time-domain methods.

 
PACS

04.80.Nn Gravitational wave detectors and experiments

95.75.Kk Interferometry

95.55.Ym Gravitational radiation detectors; mass spectrometers; and other instrumentation and techniques

95.55.Br Astrometric and interferometric instruments

MSC

83C35 Gravitational waves

Subjects

Instrumentation and measurement

Gravitation and cosmology

Astrophysics and astroparticles

Dates

Issue 20 (21 October 2005)

Received 8 July 2005 , in final form 18 August 2005

Published 27 September 2005



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