First all-sky upper limits from LIGO on the strength of periodic gravitational waves using the Hough transform
arXiv:gr-qc/0508065 · doi:10.1103/PhysRevD.72.102004
Abstract
We perform a wide parameter space search for continuous gravitational waves over the whole sky and over a large range of values of the frequency and the first spin-down parameter. Our search method is based on the Hough transform, which is a semi-coherent, computationally efficient, and robust pattern recognition technique. We apply this technique to data from the second science run of the LIGO detectors and our final results are all-sky upper limits on the strength of gravitational waves emitted by unknown isolated spinning neutron stars on a set of narrow frequency bands in the range 200-Hz. The best upper limit on the gravitational wave strain amplitude that we obtain in this frequency range is .
arXiv comment22 pages, 21 figures, to be submitted to Phys. Rev. D
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