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
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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
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通讯作者:
E. al.
E. al.
中科院分区:
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文献类型:
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作者:
L. S. C. B. Abbott;E. al.

文献摘要

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我们执行一个广泛的参数空间搜索连续引力波在整个天空中,并在一个大的范围内的值的频率和第一自旋参数。我们的搜索方法是基于霍夫变换,这是一个半相干的,计算效率高,鲁棒的模式识别技术。我们将这种技术应用于LIGO探测器第二次科学运行的数据,我们的最终结果是未知孤立旋转中子星在200- 400 $Hz范围内的一组窄频带上发射的引力波强度的全天上限。在此频率范围内,我们得到的引力波应变振幅的最佳上限为4.43 × 10^{-23}$。
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 $4.43\times 10^{-23}$.