Total-variation-based methods for gravitational wave denoising
Total-variation-based methods for gravitational wave denoising
复制标题
基于全变分的引力波去噪方法
DOI：
10.1103/physrevd.90.084029
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发表时间：
2014
影响因子：
5
通讯作者：
J. Ib'anez
中科院分区：
文献类型：
--
作者：
Alejandro Torres;A. Marquina;J. Font;J. Ib'anez
本文描述了一种基于加性高斯噪声的引力波去噪和探测新方法，该方法基于总变分去噪算法。这些算法不需要任何关于信号的先验信息，最初是在图像处理的背景下开发和充分测试的。为了说明我们的方法的能力，我们将它们应用于两种不同类型的数值模拟引力波信号，即旋转恒星核心坍缩产生的爆发和双黑洞合并产生的波形。我们探索了这些方法的参数空间，以找到在不同波形类型和信噪比等条件下最适合引力波信号去噪的值集。我们的结果表明，我们的技术可以成功地去除引力波信号中的噪声，而不管信号的形态或天体物理起源如何。我们还将我们的方法与谱图结合起来，并展示了如何将这些方法与引力波数据分析中的其他常用技术同时使用，以提高探测的机会。
Observatori Astronomic, Universitat de Valencia, C/ Catedratico Jose Beltran 2,46980, Paterna (Valencia), Spain(Received 29 July 2014; published 16 October 2014)We describe new methods for denoising and detection of gravitational waves embedded in additiveGaussiannoise.Themethodsarebasedontotalvariationdenoisingalgorithms.Thesealgorithms,whichdonot need any a priori information about the signals, have been originally developed and fully tested in thecontext of image processing. To illustrate the capabilities of our methods we apply them to two differenttypes of numerically-simulated gravitational wave signals, namely bursts produced from the core collapseof rotating stars and waveforms from binary black hole mergers. We explore the parameter space of themethods to find the set of values best suited for denoising gravitational wave signals under differentconditions such as waveform type and signal-to-noise ratio. Our results show that noise from gravitationalwave signals can be successfully removed with our techniques, irrespective of the signal morphology orastrophysical origin. We also combine our methods with spectrograms and show how those can be usedsimultaneously with other common techniques in gravitational wave data analysis to improve the chancesof detection.