Fast evaluation of multidetector consistency for real-time gravitational wave searches
Fast evaluation of multidetector consistency for real-time gravitational wave searches
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DOI：
10.1103/physrevd.101.022003
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发表时间：
2019-01
影响因子：
5
通讯作者：
C. Hanna;S. Caudill;C. Messick;A. Reza;S. Sachdev;L. Tsukada;K. Cannon;K. Blackburn;J. Creighton;H. Fong;P. Godwin;S. Kapadia;T. Li;R. Magee;D. Meacher;D. Mukherjee;A. Pace;S. Privitera;R. K. Lo;L. Wade
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文献类型：
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作者：
C. Hanna;S. Caudill;C. Messick;A. Reza;S. Sachdev;L. Tsukada;K. Cannon;K. Blackburn;J. Creighton;H. Fong;P. Godwin;S. Kapadia;T. Li;R. Magee;D. Meacher;D. Mukherjee;A. Pace;S. Privitera;R. K. Lo;L. Wade
引力波搜索与LIGO和处女座紧密的双星合并目前是一个两个阶段的过程。首先，识别引力波信号。然后，对可能的信号参数执行穷举搜索。为了最大限度地增加所识别的引力波源的数量，识别阶段的效率是至关重要的。利用LIGO和Virgo对引力波信号的初始识别是实时进行的，这要求每收集一秒引力波数据，所需的计算时间必须少于一秒。相比之下，随后的参数估计可能需要数百个小时的计算时间来分析相同的一秒引力波数据。为了满足实时识别的要求，必须采用高效且经常是近似的信号分析方法。我们描述了一种实时识别引力波的方法：一种确定多个引力波探测器之间信号一致性的有效方法，适用于紧凑二元合并的引力波实时搜索。这项技术被用于分析高级LIGO的第二次观测飞行和高级处女座的第一次观测飞行。
Gravitational waves searches for compact binary mergers with LIGO and Virgo are presently a two stage process. First, a gravitational wave signal is identified. Then, an exhaustive search over possible signal parameters is performed. It is critical that the identification stage is efficient in order to maximize the number of gravitational wave sources that are identified. Initial identification of gravitational wave signals with LIGO and Virgo happens in real-time which requires that less than one second of computational time must be used for each one second of gravitational wave data collected. In contrast, subsequent parameter estimation may require hundreds of hours of computational time to analyze the same one second of gravitational wave data. The real-time identification requirement necessitates efficient and often approximate methods for signal analysis. We describe one piece of real-time gravitational-wave identification: an efficient method for ascertaining a signal's consistency between multiple gravitational wave detectors suitable for real-time gravitational wave searches for compact binary mergers. This technique was used in analyses of Advanced LIGO's second observing run and Advanced Virgo's first observing run.