Data analysis for LIGO--ALLEGRO stochastic search

doi:10.1088/0264-9381/22/18/S23

A data analysis technique for the LIGO–ALLEGRO stochastic background search

John T Whelan et al 2005 Class. Quantum Grav. 22 S1087-S1096 doi: 10.1088/0264-9381/22/18/S23

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John T Whelan¹, Sukanta Bose², Jonathan Hanson³, Ik Siong Heng⁴, Warren W Johnson³, Martin P McHugh¹ and Peter Zhang³
¹ Department of Physics, Loyola University, New Orleans, Louisiana 70118, USA
² Washington State University, Pullman, Washington 99164, USA
³ Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
⁴ Department of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, UK
E-mail: jtwhelan@loyno.edu

Abstract. We describe the cross-correlation measurements being carried out on data from the LIGO Livingston Observatory and the ALLEGRO resonant bar detector. The LIGO data are sampled at 16 384 Hz while the ALLEGRO data are base-banded, i.e., heterodyned at 899 Hz and then sampled at 250 Hz. We handle these different sampling parameters by working in the Fourier domain, and demonstrate the approximate equivalence of this measurement to a hypothetical time-domain method in which both data streams are upsampled.

PACS numbers: 04.80.Nn, 07.05.Kf, 98.70.Vc

Print publication: Issue 18 (21 September 2005)
Received 4 April 2005, in final form 6 June 2005
Published 6 September 2005

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A data analysis technique for the LIGO–ALLEGRO stochastic background search

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