A joint search for gravitational wave bursts with AURIGA and LIGO
Abstract
The first simultaneous operation of the AURIGA detectorhttp://www.auriga.lnl.infn.it and the LIGO observatoryhttp://www.ligo.org was an opportunity to explore real data, joint analysis methods between two very different types of gravitational wave detectors: resonant bars and interferometers. This paper describes a coincident gravitational wave burst search, where data from the LIGO interferometers are crosscorrelated at the time of AURIGA candidate events to identify coincident transients. The analysis pipeline is tuned with two thresholds, on the signaltonoise ratio of AURIGA candidate events and on the significance of the crosscorrelation test in LIGO. The false alarm rate is estimated by introducing time shifts between data sets and the network detection efficiency is measured by adding simulated gravitational wave signals to the detector output. The simulated waveforms have a significant fraction of power in the narrower AURIGA band. In the absence of a detection, we discuss how to set an upper limit on the rate of gravitational waves and to interpret it according to different source models. Due to the short amount of analyzed data and to the high rate of nonGaussian transients in the detectors' noise at the time, the relevance of this study is methodological: this was the first joint search for gravitational wave bursts among detectors with such different spectral sensitivity and the first opportunity for the resonant and interferometric communities to unify languages and techniques in the pursuit of their common goal.
 Publication:

Classical and Quantum Gravity
 Pub Date:
 May 2008
 DOI:
 10.1088/02649381/25/9/095004
 arXiv:
 arXiv:0710.0497
 Bibcode:
 2008CQGra..25i5004B
 Keywords:

 General Relativity and Quantum Cosmology
 EPrint:
 18 pages, IOP, 12 EPS figures