Exploiting LargeScale Correlations to Detect Continuous Gravitational Waves
Abstract
Fully coherent searches (over realistic ranges of parameter space and yearlong observation times) for unknown sources of continuous gravitational waves are computationally prohibitive. Less expensive hierarchical searches divide the data into shorter segments which are analyzed coherently, then detection statistics from different segments are combined incoherently. The novel method presented here solves the longstanding problem of how best to do the incoherent combination. The optimal solution exploits largescale parameterspace correlations in the coherent detection statistic. Application to simulated data shows dramatic sensitivity improvements compared with previously available (ad hoc) methods, increasing the spatial volume probed by more than 2 orders of magnitude at lower computational cost.
 Publication:

Physical Review Letters
 Pub Date:
 October 2009
 DOI:
 10.1103/PhysRevLett.103.181102
 arXiv:
 arXiv:0906.0023
 Bibcode:
 2009PhRvL.103r1102P
 Keywords:

 04.80.Nn;
 95.55.Ym;
 95.75.z;
 97.60.Jd;
 Gravitational wave detectors and experiments;
 Gravitational radiation detectors;
 mass spectrometers;
 and other instrumentation and techniques;
 Observation and data reduction techniques;
 computer modeling and simulation;
 Neutron stars;
 General Relativity and Quantum Cosmology
 EPrint:
 4 pages, 2 figures