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arXiv 2002.09407astro-ph.IM
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非平稳噪声中紧双星聚并过程的动态归一化

Dynamic Normalization for Compact Binary Coalescence Searches in Non-Stationary Noise

S. Mozzon, L. K. Nuttall, A. Lundgren, T. Dent, S. Kumar, A. H. Nitz

摘要:

引力波干涉仪的输出,如LIGO和Virgo,可能是高度非平稳的。宽带检测器噪声可影响检测器灵敏度达数十秒的量级。引力波瞬变搜索,比如对碰撞黑洞的搜索,估计这种噪声,以便识别引力波事件。在非平稳期间,我们看到报告错误事件的比率更高。为了准确地从噪声中分离信号,必须将不断变化的探测器状态纳入引力波搜索。我们开发了一个新的统计估计的干涉检测器噪声的变化。我们使用这个统计数据来重新排序在LIGO-Virgo的第二次观察期间通过PyCBC搜索管道识别的候选事件。这导致了低质量双星,特别是双星中子星合并的灵敏度体积提高了5%。

英文摘要:

The output of gravitational-wave interferometers, such as LIGO and Virgo, can be highly non-stationary. Broadband detector noise can affect the detector sensitivity on the order of tens of seconds. Gravitational-wave transient searches, such as those for colliding black holes, estimate this noise in order to identify gravitational-wave events. During times of non-stationarity we see a higher rate of false events being reported. To accurately separate signal from noise, it is imperative to incorporate the changing detector state into gravitational-wave searches. We develop a new statistic which estimates the variation of the interferometric detector noise. We use this statistic to re-rank candidate events identified during LIGO-Virgo's second observing run by the PyCBC search pipeline. This results in a 5% improvement in the sensitivity volume for low mass binaries, particularly binary neutron stars mergers.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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