Gravitational Wave Data Analysis For LIGO

LIGO 引力波数据分析

• 批准号: 0071028
• 负责人: Bruce Allen
• 金额: $ 63万
• 依托单位: University of Wisconsin-Milwaukee
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-09-01 至 2003-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0071028&HistoricalAwards=false
• 关键词: Gravitational; Wave; Data; Analysis; LIGO

This project will carry out LIGO Scientific Collaboration (LSC) researchactivities related to the analysis of data from the NSF-funded LaserInterferometer Gravitational Wave Observatory (LIGO). This includesthe development and testing of algorithms and data analysis techniquesto search for gravitational waves from known astrophysicalsources. Since these will produce extremely weak signals, the dataanalysis problem is to find these signals in a noisy data stream,where the statistical properties of the noise are not straightforwardto characterize. The UWM group is developing and testing dataanalysis strategies and algorithms which are not adversely affected byinstrumental anomalies. This work includes the writing of bothprototype and production codes, which are then tested and comparedwith other techniques. The best methods are then migrated into theLIGO Data Analysis System where they can be run on very large datasets.This work is crucial to the success of LIGO, which is an NSF-fundedproject to detect gravitational waves of astrophysical origin. Suchwaves are emitted by astrophysical sources such as coalescing pairs ofbinary neutron stars, supernovae, and pulsars, but are very weak andhave never been directly observed. This is why new and specializedtypes of data analysis methods are needed. Direct observation wouldconfirm a fundamental prediction of physics -- the existence ofgravitational waves -- and provide a unique tool for observing exoticastrophysical phenomena. The two LIGO observatories are located inHanford, WA and Livingston, LA, and have been under construction since1995; they will be completed and operating sometime during 2001.

该项目将开展与 NSF 资助的激光干涉仪引力波天文台 (LIGO) 数据分析相关的 LIGO 科学合作 (LSC) 研究活动。 这包括开发和测试算法和数据分析技术，以从已知的天体物理源中搜索引力波。由于这些信号会产生极弱的信号，因此数据分析问题是在噪声数据流中找到这些信号，其中噪声的统计特性无法直接表征。 UWM 小组正在开发和测试不会受到仪器异常不利影响的数据分析策略和算法。 这项工作包括编写原型和生产代码，然后对其进行测试并与其他技术进行比较。然后将最好的方法迁移到 LIGO 数据分析系统中，在该系统中它们可以在非常大的数据集上运行。这项工作对于 LIGO 的成功至关重要，LIGO 是一个由 NSF 资助的项目，旨在探测天体物理起源的引力波。 此类波由双中子星、超新星和脉冲星等天体物理源发射，但非常微弱，从未被直接观测到。 这就是为什么需要新的、专门类型的数据分析方法。 直接观测将证实物理学的基本预测——引力波的存在——并为观察奇异的天体物理现象提供独特的工具。 两个 LIGO 天文台分别位于华盛顿州汉福德和路易斯安那州利文斯顿，自 1995 年起开始建设；它们将于2001年某个时候完工并投入运行。