论文标题
同时估计引力波数据中噪声和紧凑的二进制信号参数
Concurrent estimation of noise and compact-binary signal parameters in gravitational-wave data
论文作者
论文摘要
紧凑型二进制信号的重力波参数估计通常依赖于检测器高斯噪声和二进制参数的性质的顺序估计。该过程假设通过其功率谱密度表达的噪声方差已在预先提前知道。我们通过分析同时估计噪声和紧凑的二进制参数，评估了这种近似值对估计参数的影响，从而使我们能够在噪声特性的不确定性上边缘化。我们使用GWTC-3目录中的事件比较了传统的顺序估计方法和新的完整边缘化方法。我们发现，恢复的信号和推断的参数同意其统计测量不确定性。在当前的检测器敏感性下，与其他不确定性来源相比，噪声功率频谱密度的不确定性是一种亚辅助作用。
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.
