All-sky search for gravitational-wave bursts in the second joint LIGO-Virgo run
All-sky search for gravitational-wave bursts in the second joint LIGO-Virgo run
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DOI：
10.1103/physrevd.85.122007
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发表时间：
2012-06-20
影响因子：
5
通讯作者：
Zweizig, J.
中科院分区：
文献类型：
--
作者：
Abadie, J.;Abbott, B. P.;Zweizig, J.
我们目前的结果，从搜索引力波爆发的数据收集的LIGO和处女座探测器在2009年7月7日和2010年10月20日：数据进行分析时，至少有两个的三个LIGO-Virgo探测器是在一致的操作，总观测时间为207天。该分析在64-5000 Hz频带上搜索持续时间小于或类似于1 s的瞬态，而不对信号波形、极化、方向或发生时间进行其他假设。所有识别的事件均与预期的意外背景一致。我们通过将这次搜索与之前的LIGO-Virgo搜索结合起来，对2005年11月至2007年10月期间收集的数据设置了引力波爆发速率的频率上限。在90%的置信度下，地球上强引力波爆发的速率上限是每年1.3次。我们还提出了上限的源率密度，每年和Mpc（3）的样本人口的标准蜡烛源。与前一次联合运行一样，这些波形的应变振幅和平方根搜索的典型灵敏度在5 x 10（-22）Hz（-1/2）至1 x 10（-20）Hz（-1/2）的范围内。两次联合运行的结合需要对一般引力波爆发进行最灵敏的全天搜索，并综合了第一代干涉测量探测器所取得的结果。
We present results from a search for gravitational-wave bursts in the data collected by the LIGO and Virgo detectors between July 7, 2009 and October 20, 2010: data are analyzed when at least two of the three LIGO-Virgo detectors are in coincident operation, with a total observation time of 207 days. The analysis searches for transients of duration less than or similar to 1 s over the frequency band 64-5000 Hz, without other assumptions on the signal waveform, polarization, direction or occurrence time. All identified events are consistent with the expected accidental background. We set frequentist upper limits on the rate of gravitational-wave bursts by combining this search with the previous LIGO-Virgo search on the data collected between November 2005 and October 2007. The upper limit on the rate of strong gravitational-wave bursts at the Earth is 1.3 events per year at 90% confidence. We also present upper limits on source rate density per year and Mpc(3) for sample populations of standard-candle sources. As in the previous joint run, typical sensitivities of the search in terms of the root-sum-squared strain amplitude for these waveforms lie in the range similar to 5 x 10(-22) Hz(-1/2) to similar to 1 x 10(-20) Hz(-1/2). The combination of the two joint runs entails the most sensitive all-sky search for generic gravitational-wave bursts and synthesizes the results achieved by the initial generation of interferometric detectors.