Concurrent estimation of noise and compact-binary signal parameters in gravitational-wave data
Concurrent estimation of noise and compact-binary signal parameters in gravitational-wave data
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DOI：
10.1103/physrevd.106.104021
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发表时间：
2022-08
影响因子：
5
通讯作者：
C. Plunkett;S. Hourihane;K. Chatziioannou
中科院分区：
文献类型：
--
作者：
C. Plunkett;S. Hourihane;K. Chatziioannou
紧凑二进制信号的引力波参数估计通常依赖于探测器高斯噪声和二进制参数的属性的顺序估计。该过程假设通过功率谱密度表示的噪声方差是预先完全已知的。我们通过同时估计噪声和紧凑二进制参数的分析来评估这种近似对估计参数的影响，从而使我们能够边缘化噪声属性的不确定性。我们使用 GWTC-3 目录中的事件比较传统的序贯估计方法和新的完全边缘化方法。我们发现恢复的信号和推断的参数在其统计测量不确定度范围内一致。在当前探测器灵敏度下，与其他不确定性来源相比，噪声功率谱密度的不确定性是次要的影响。
Gravitational-wave parameter estimation for compact binary signals typically relies on sequential estimation of the properties of the detector Gaussian noise and of the binary parameters. This procedure assumes that the noise variance, expressed through its power spectral density, is perfectly known in advance. We assess the impact of this approximation on the estimated parameters by means of an analysis that simultaneously estimates the noise and compact binary parameters, thus allowing us to marginalize over uncertainty in the noise properties. We compare the traditional sequential estimation method and the new full marginalization method using events from the GWTC-3 catalog. We find that the recovered signals and inferred parameters agree to within their statistical measurement uncertainty. At current detector sensitivities, uncertainty about the noise power spectral density is a subdominant effect compared to other sources of uncertainty.