Search for gravitational-wave bursts in the first year of the fifth LIGO science run
Search for gravitational-wave bursts in the first year of the fifth LIGO science run
复制标题
第五次 LIGO 科学运行第一年寻找引力波爆发
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
E. al.
中科院分区：
文献类型：
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作者：
L. S. C. B. Abbott;E. al.
我们给出了LIGO探测器在其第五次科学运行的第一年(2005年11月至2006年11月)对-2000赫兹频率范围内的引力波(GW)爆发进行全天搜索所获得的结果。分析的总生存期为268.6天。在这次搜索中调用了多种分层数据分析方法。对于不同形态的引力波爆发，以方根和应变幅度hrss表示的总体灵敏度在6倍10-22 Hz^-1/2}到几倍10-21 Hz^-1/2}之间。没有观测到GW信号，并且将每年3.6次GW强爆发的频率上限设置在90%的置信度水平。与我们之前的搜索一样，我们还将该速率限制与所选波形形态的检测效率相结合，以获得事件发生率与强度排除曲线。在敏感性方面，这些排除曲线是迄今为止最严格的。
We present the results obtained from an all-sky search for gravitational-wave (GW) bursts in the 64-2000 Hz frequency range in data collected by the LIGO detectors during the first year (November 2005 - November 2006) of their fifth science run. The total analyzed livetime was 268.6 days. Multiple hierarchical data analysis methods were invoked in this search. The overall sensitivity expressed in terms of the root-sum-square (rss) strain amplitude h_{rss} for gravitational-wave bursts with various morphologies was in the range of 6 times 10^{-22} Hz^{-1/2} to a few times 10^{-21} Hz^{-1/2}. No GW signals were observed and a frequentist upper limit of 3.6 events per year on the rate of strong GW bursts was placed at the 90% confidence level. As in our previous searches, we also combined this rate limit with the detection efficiency for selected waveform morphologies to obtain event rate versus strength exclusion curves. In sensitivity, these exclusion curves are the most stringent to date.