Accurate modeling and mitigation of overlapping signals and glitches in gravitational-wave data
Accurate modeling and mitigation of overlapping signals and glitches in gravitational-wave data
复制标题
DOI：
10.1103/physrevd.106.042006
复制
发表时间：
2022-05
影响因子：
5
通讯作者：
S. Hourihane;K. Chatziioannou;M. Wijngaarden;D. Davis;T. Littenberg;N. Cornish
中科院分区：
文献类型：
--
作者：
S. Hourihane;K. Chatziioannou;M. Wijngaarden;D. Davis;T. Littenberg;N. Cornish
引力波探测器灵敏度的提高带来了天体物理信号检测率的增加以及“小故障”率的增加;瞬时和非高斯探测器噪声。检测器中信号和毛刺的时间重叠对通常假设仅存在高斯检测器噪声的推断分析提出了挑战。在这项研究中，我们进行了广泛的探索最近提出的方法，模型的毛刺与正弦高斯小波，同时建模的信号与紧凑的二进制波形模板的效率。我们探索了广泛的毛刺家族和信号形态，并证明毛刺和信号（分别用小波和模板）的联合建模可以可靠地将两者分开。我们发现，最有效的参数估计的毛刺也是由于其紧凑的时频特征而被这样的小波很好地建模的毛刺。作为进一步的测试，我们调查了这种分析对波形系统学的鲁棒性，如排除高阶模式和自旋进动效应所产生的。我们的分析提供了信号参数的估计值;要从数据中减去的毛刺波形;以及对某些检测到的过量功率是否由毛刺、信号或两者组成的评估。我们分析了低显著性触发器（191225 215715和200114 020818），发现它们都与高质量信号重叠的毛刺一致。D max，而低频截频低运行的采样率为2048 Hz，采样率为1024 Hz（这排除了潮汐群分析目标重叠数据的任何可能性，尽管毛刺的确切中心可能会根据长期和短期毛刺行为而移动。
The increasing sensitivity of gravitational-wave detectors has brought about an increase in the rate of astrophysical signal detections as well as the rate of “glitches”; transient and non-Gaussian detector noise. Temporal overlap of signals and glitches in the detector presents a challenge for inference analyses that typically assume the presence of only Gaussian detector noise. In this study we perform an extensive exploration of the efficacy of a recently proposed method that models the glitch with sine-Gaussian wavelets while simultaneously modeling the signal with compact-binary waveform templates. We explore a wide range of glitch families and signal morphologies and demonstrate that the joint modeling of glitches and signals (with wavelets and templates respectively) can reliably separate the two. We find that the glitches that most affect parameter estimation are also the glitches that are well modeled by such wavelets due to their compact time-frequency signature. As a further test, we investigate the robustness of this analysis against waveform systematics like those arising from the exclusion of higher-order modes and spin-precession effects. Our analysis provides an estimate of the signal parameters; the glitch waveform to be subtracted from the data; and an assessment of whether some detected excess power consists of a glitch, signal, or both. We analyze the low-significance triggers (191225 215715 and 200114 020818) and find that they are both consistent with glitches overlapping high-mass signals. D max , and the low-frequency cutoff f low runs have a sampling rate of 2048Hz used a sampling rate of 1024 Hz (which precludes any possibility of tidal group analyses target overlapping data, though the exact center of the glitch might be shifted according to long- and short-term glitch behavior.