论文标题
带有物理校准模型的重力波天文学
Gravitational-wave astronomy with a physical calibration model
论文作者
论文摘要
我们在Ligo-Virgo的第一个重力波瞬态目录（GWTC-1）中，对紧凑型二进制合并事件进行天体物理推断，并使用出色动机的校准模型进行。我们证明，重要性抽样可用于降低原本具有挑战性分析的成本。我们表明，包括对校准误差分布的物理估计值对GWTC-1中事件的参数推断的推论可以忽略不计。研究具有匹配的滤波器信号噪声比的模拟信号$ \ text {snr} = 200 $，我们预测，对于当前的重力波检测器，GWTC-1典型的校准误差估算值可能可以忽略不计。我们认为，系统错误的其他来源 - 波形，先前的分布和噪声建模可能更重要。最后，将使用GWTC-1中的事件作为标准警报器，我们推断出了有关LIGO干涉仪中校准误差的估计值的天体知识改进。
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.
