Rapid parameter estimation of gravitational waves from binary neutron star coalescence using focused reduced order quadrature
Rapid parameter estimation of gravitational waves from binary neutron star coalescence using focused reduced order quadrature
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DOI：
10.1103/physrevd.102.104020
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发表时间：
2020-07
影响因子：
5
通讯作者：
S. Morisaki;V. Raymond
中科院分区：
文献类型：
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作者：
S. Morisaki;V. Raymond
快速估计双星中子星合并引力波的参数，特别是在初始探测阶段后几分钟内准确地定位天空，对于多信使观测的成功至关重要。用于LIGO-Virgo合作生产分析的加速参数估计的技术之一是降阶求积(ROQ)。虽然它显著加快了参数估计速度，但所需时间仍在几个小时的数量级。针对参数估计跟踪可以根据检测阶段的信息进行调整的特点，我们对ROQ技术进行了改进，提出了一种新的方法，称为聚焦降阶求积(FROQ)。我们发现，FROQ将参数估计的速度提高了$\mathcal{O}(10^3)$到$\mathcal{O}(10^4)$，并且能够在检测后几十分钟内提供准确的源特性，如源的位置。
Rapid parameter estimation of gravitational waves from binary neutron star coalescence, in particular accurate sky localisation in minutes after the initial detection stage, is crucial for the success of multi-messenger observations. One of the techniques to speed up the parameter estimation, which has been applied for the production analysis of the LIGO-Virgo collaboration, is reduced order quadrature (ROQ). While it speeds up parameter estimation significantly, the time required is still on the order of hours. Focusing on the fact that the parameter-estimation follow-up can be tuned with the information available at the detection stage, we improve the ROQ technique and develop a new technique, which we designate focused reduced order quadrature (FROQ). We find that FROQ speeds up the parameter estimation by a factor of $\mathcal{O}(10^3)$ to $\mathcal{O}(10^4)$ and enables providing accurate source properties such as the location of a source in several tens of minutes after detection.