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arXiv 0705.0688gr-qc
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2005年期间IGEC-2对引力波爆发的搜索结果

Results of the IGEC-2 search for gravitational wave bursts during 2005

2 Collaboration

摘要:

引力波共振棒探测器网络恢复了国际引力事件协作组(IGEC-2)的协调观测。四个探测器参与了这项合作:ALLEGRO,AURIGA,EXPLORER和NAUTILUS。本文介绍了2005年IGEC-2是唯一一个在运行的引力波观测站,在6个月内对引力波爆发的搜寻结果。实施的网络数据分析基于AURIGA、EXPLORER和NAUTILUS之间的时间重合检索,保留来自ALLEGRO的数据用于后续研究。相对于先前的IGEC 1997-2000观测,探测器对爆发的振幅灵敏度提高了约3倍,灵敏度带宽更宽,因此考虑到更大类的可探测波形,对数据分析进行了调整。由于单个探测器的占空比更高,我们决定将分析重点放在三重观测上,以确保以高统计置信度识别任何单个候选引力波(gw)。实现的误检率低至每世纪1。没有找到候选人。

英文摘要:

The network of resonant bar detectors of gravitational waves resumed coordinated observations within the International Gravitational Event Collaboration (IGEC-2). Four detectors are taking part in this collaboration: ALLEGRO, AURIGA, EXPLORER and NAUTILUS. We present here the results of the search for gravitational wave bursts over 6 months during 2005, when IGEC-2 was the only gravitational wave observatory in operation. The network data analysis implemented is based on a time coincidence search among AURIGA, EXPLORER and NAUTILUS, keeping the data from ALLEGRO for follow-up studies. With respect to the previous IGEC 1997-2000 observations, the amplitude sensitivity of the detectors to bursts improved by a factor about 3 and the sensitivity bandwidths are wider, so that the data analysis was tuned considering a larger class of detectable waveforms. Thanks to the higher duty cycles of the single detectors, we decided to focus the analysis on three-fold observation, so to ensure the identification of any single candidate of gravitational waves (gw) with high statistical confidence. The achieved false detection rate is as low as 1 per century. No candidates were found.

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