Gravitational-wave astronomy with a physical calibration model
Gravitational-wave astronomy with a physical calibration model
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DOI：
10.1103/physrevd.102.122004
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发表时间：
2020-09
影响因子：
5
通讯作者：
E. Payne;C. Talbot;P. Lasky;E. Thrane;J. Kissel
中科院分区：
文献类型：
--
作者：
E. Payne;C. Talbot;P. Lasky;E. Thrane;J. Kissel
我们进行天体物理推断紧凑的二元合并事件在LIGO-Virgo的第一个引力波瞬变目录（GWTC-1）使用物理动机的校准模型。我们证明，重要性抽样可以用来降低成本，否则将是一个计算上具有挑战性的分析。我们表明，包括校准误差分布的物理估计对GWTC-1事件的参数推断的影响可以忽略不计。研究匹配滤波器的信噪比$\text{SNR}=200$的模拟信号，我们项目的校准误差估计典型的GWTC-1可能是可以忽略不计的当前一代的引力波探测器。我们认为，其他来源的系统误差-从波形，先验分布和噪声建模-可能是更重要的。最后，使用GWTC-1中的事件作为标准警报器，我们推断出LIGO干涉仪校准误差估计的天体物理学改进。
We carry out astrophysical inference for compact binary merger events in LIGO-Virgo's first gravitational-wave transient catalog (GWTC-1) using a physically motivated calibration model. We demonstrate that importance sampling can be used to reduce the cost of what would otherwise be a computationally challenging analysis. We show that including the physical estimate for the calibration error distribution has negligible impact on the inference of parameters for the events in GWTC-1. Studying a simulated signal with matched filter signal-to-noise ratio $\text{SNR}=200$, we project that a calibration error estimate typical of GWTC-1 is likely to be negligible for the current generation of gravitational-wave detectors. We argue that other sources of systematic error---from waveforms, prior distributions, and noise modelling---are likely to be more important. Finally, using the events in GWTC-1 as standard sirens, we infer an astrophysically-informed improvement on the estimate of the calibration error in the LIGO interferometers.