减小并合双星系统引力波探测中的虚警
Reducing False Alarms in Searches for Gravitational Waves from Coalescing Binary Systems
摘要：
位于洛杉矶利文斯顿和华盛顿州汉福德的LIGO天文台可能会探测到由两个紧凑物体组成的合并双星系统发出的引力波。为了探测紧凑双星合并（CBC）事件，LIGO搜索利用匹配滤波技术。匹配滤波是平稳、高斯噪声的最佳检测策略，然而，LIGO噪声通常是非平稳、非高斯的。非平稳噪声导致过量的假候选事件，通常称为假警报。本文提出了r^2检验来降低LIGO CBC搜索的虚警率。还介绍了LIGO第三次科学运行（S3）中寻找原始黑洞双星系统（每个物体的太阳质量小于1 M）的结果。R^2检验的结果显示在几次LIGO CBC搜索中，包括第三和第四次科学运行（S3/S4）中的双星中子星搜索，S3/S4原始黑洞搜索，以及第五次科学运行（S5）前三个月的双星黑洞搜索。r^2检验显著降低了这些搜索中的误报率，同时只错误地排除了一小部分模拟事件。
英文摘要：
LIGO observatories in Livingston, LA and Hanford, WA may detect gravitational waves emitted from coalescing binary systems composed of two compact objects. In order to detect compact binary coalescence (CBC) events, LIGO searches utilize matched filtering techniques. Matched filtering is the optimal detection strategy for stationary, Gaussian noise, however, LIGO noise is often non-stationary, non-Gaussian. Non-stationary noise result in an excess of false candidate events, commonly known as false alarms. This thesis develops the r^2 test to reduce the false alarm rate for LIGO CBC searches. Results of the search for primordial black hole binary systems (where each object has less than 1M_solar), in LIGO's Third Science Run (S3) is also presented. Results of the r^2 test are shown for several LIGO CBC searches, including the binary neutron star searches in the Third and Fourth Science Runs (S3/S4), the S3/S4 primordial black hole searches, and the binary black hole search in the first three months of the Fifth Science Run (S5). The r^2 test significantly reduces the false alarm rate in these searches, while only falsely dismissing a small fraction of simulated events.
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。
