First all-sky upper limits from LIGO on the strength of periodic gravitational waves using the Hough transform
First all-sky upper limits from LIGO on the strength of periodic gravitational waves using the Hough transform
复制标题
使用霍夫变换得出 LIGO 关于周期引力波强度的第一个全天空上限
DOI:
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发表时间:
2005
期刊:
影响因子:
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通讯作者:
E. al.
中科院分区:
文献类型:
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作者:
L. S. C. B. Abbott;E. al.
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-$400 $Hz. The best upper limit on the gravitational wave strain amplitude that we obtain in this frequency range is $4.43\times 10^{-23}$.