论文标题
用分形表征重力波检测器噪声
Characterization of gravitational-wave detector noise with fractals
论文作者
论文摘要
我们提出了一种基于分形分析的新方法，以表征以一组真实价值的离散物理测量形式的物理检测器的输出。我们将该方法应用于激光干涉仪重力波观测站的最新观测过程中的重力波数据。我们表明，主要检测器输出（应变通道）的分形维度的度量可用于确定仪器状态，测试数据平稳性并识别低潜伏期中的非没应物理多余噪声。当应用于仪器控制和环境数据（辅助通道）时，分形维度可用于识别噪声瞬变的起源，各个检测器子系统中的非线性耦合的起源，并提供了一种限制低质量数据的方法。
We present a new method, based on fractal analysis, to characterize the output of a physical detector that is in the form of a set of real-valued, discrete physical measurements. We apply the method to gravitational-wave data from the latest observing run of the Laser Interferometer Gravitational-wave Observatory. We show that a measure of the fractal dimension of the main detector output (strain channel) can be used to determine the instrument status, test data stationarity, and identify non-astrophysical excess noise in low latency. When applied to instrument control and environmental data (auxiliary channels) the fractal dimension can be used to identify the origins of noise transients, non-linear couplings in the various detector subsystems, and provide a means to flag stretches of low-quality data.
