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arXiv 1302.0509gr-qc
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自旋中子星的引力波的全天窄带搜索的模板库

Banks of templates for all-sky narrow-band searches of gravitational waves from spinning neutron stars

Andrzej Pisarski, Piotr Jaranowski

摘要:

我们构建了有效的银行的模板,适用于几乎单色的引力波起源于我们的银河系中的旋转中子星的干涉探测器收集的数据的全天窄带搜索。我们考虑包含一个自旋参数的波,我们假设引力波源在天空中的位置和波的频率以及自旋参数都是未知的。在构造中,我们采用简化的信号模型,具有恒定的幅度和相位,这是一个未知参数的线性函数。我们的模板银行使快速傅立叶变换算法的使用中的最大似然$\mathcal{F}$ -统计定义银行的网格的节点的计算,并满足额外的约束需要重新采样的数据,以重心时间有效。所有这些模板库特征都被用于最近全天空$\mathcal{F}$ --在Virgo VSR 1数据中对连续引力波的基于天文学的搜索[J.Aasi等人,经典量子引力31,165014(2014)]。在这里,我们通过构建适合于较大范围的搜索参数和较小厚度的搜索参数的某些值的模板来改进该模板库。我们的一个模板库的厚度比Virgo VSR 1数据的全天空搜索中使用的模板库的厚度小12%,并且仅比覆盖$A_4^\star$的4维最佳晶格的厚度大4%。

英文摘要:

We construct efficient banks of templates suitable for all-sky narrow-band searches of almost monochromatic gravitational waves originating from spinning neutron stars in our Galaxy in data collected by interferometric detectors. We consider waves with one spindown parameter included and we assume that both the position of the gravitational-wave source in the sky and the wave's frequency together with spindown parameter are unknown. In the construction we employ simplified model of the signal with constant amplitude and phase which is a linear function of unknown parameters. Our template banks enable usage of the fast Fourier transform algorithm in the computation of the maximum-likelihood $\mathcal{F}$-statistic for nodes of the grids defining the bank and fulfill an additional constraint needed to resample the data to barycentric time efficiently. All these template bank features were employed in the recent all-sky $\mathcal{F}$-statistic-based search for continuous gravitational waves in Virgo VSR1 data [J.Aasi et al., Classical Quantum Gravity 31, 165014 (2014)]. Here we improve that template bank by constructing templates suitable for larger range of search parameters and of smaller thicknesses for certain values of search parameters. One of our template banks has thickness 12% smaller than the thickness of the template bank used in the all-sky search of Virgo VSR1 data and only 4% larger than the thickness of 4-dimensional optimal lattice covering $A_4^\star$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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