A technique to modulate the signature of a stochastic gravitational wave background

doi:10.1088/0264-9381/19/7/334

A technique to modulate the signature of a stochastic gravitational wave background

Albert Lazzarini et al 2002 Class. Quantum Grav. 19 1485-1492 doi: 10.1088/0264-9381/19/7/334

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Albert Lazzarini¹ and L Samuel Finn²
¹ LIGO Laboratory, California Institute of Technology, Pasadena, CA 91125, USA
² Center for Gravitational Physics and Geometry, Department of Physics, and Department of Astronomy and Astrophysics, The Pennsylvania State University, University Park, PA 16802, USA
E-mail: lazz@ligo.caltech.edu and LSF5@psu.edu

Abstract. Detecting a stationary, stochastic gravitational wave signal is complicated by the impossibility of observing detector noise independently of the signal. Here we describe a method of identifying this source of systematic error by varying the orientation of one of the detectors, leading to separate and independent modulations of the signal and noise contribution to the cross-correlation. The method can be applied to measurements of a stochastic gravitational wave background by the ALLEGRO/LIGO Livingston Observatory detector pair. We explore—in the context of this detector pair—how this new measurement technique is insensitive to a cross-correlated detector noise component that can confound a conventional measurement.

PACS numbers: 0480N, 0480, 9555Y

Print publication: Issue 7 (7 April 2002)
Received 27 September 2001, in final form 4 December 2001
Published 11 March 2002

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A technique to modulate the signature of a stochastic gravitational wave background

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