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arXiv 1002.3515gr-qc
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IGEC2:2005-2007年为期17个月的引力波爆发搜索

IGEC2: A 17-month search for gravitational wave bursts in 2005-2007

P. Astone, L. Baggio, M. Bassan, M. Bignotto, M. Bonaldi, P. Bonifazi, M. Cerdonio, E. Coccia, L. Conti, S. D'Antonio, M. di Paolo Emilio, M. Drago, V. Fafone, … 展开作者

P. Astone, L. Baggio, M. Bassan, M. Bignotto, M. Bonaldi, P. Bonifazi, M. Cerdonio, E. Coccia, L. Conti, S. D'Antonio, M. di Paolo Emilio, M. Drago, V. Fafone, P. Falferi, S. Foffa, P. Fortini, S. Frasca, G. Giordano, W. O. Hamilton, J. Hanson, W. W. Johnson, N. Liguori, S. Longo, M. Maggiore, F. Marin, A. Marini, M. P. McHugh, R. Mezzena, P. Miller, Y. Minenkov, A. Mion, G. Modestino, A. Moleti, D. Nettles, A. Ortolan, G. V. Pallottino, G. Pizzella, S. Poggi, G. A. Prodi, V. Re, A. Rocchi, F. Ronga, F. Salemi, R. Sturani, L. Taffarello, R. Terenzi, G. Vedovato, A. Vinante, M. Visco, S. Vitale, J. Weaver, J. P. Zendri, P. Zhang

摘要:

我们在这里提出的结果,515天的IGEC 2天文台,包括四个共振质量探测器ALLEGRO,AURIGA,EXPLORER和NAUTILUS的长期运行。报告的结果与2005年11月6日至2007年4月14日Allegro停止运行的四次观察时间有关。这一时期与LIGO干涉仪探测器进行的第一次长期观测重叠。IGEC观测的目标是以高置信度识别引力波候选者,将虚警率保持在每世纪1次的水平,以及高占空比,即所有四个站点的占空比为57%,至少三个站点同时观测的占空比为94%。网络数据分析基于在至少三个检测器上的时间重合搜索:四个3重搜索和4重搜索在逻辑OR中组合。我们通过对每组数据中的事件应用唯一的保密时间偏移,以通常的盲法交换数据。通过对每个探测器配置的非源数据进行10^8组符合分析来研究偶然背景,这些数据是通过移动每个探测器的时间序列获得的。对五次搜索的阈值进行了调整,以便将总体误报率控制在1/世纪。当机密的时间偏移被披露时,在源数据中没有发现引力波候选者。作为该搜索的额外输出,我们向其他天文台提供低于搜索阈值的三重符合列表,对应于1/月的误报率。

英文摘要:

We present here the results of a 515 days long run of the IGEC2 observatory, consisting of the four resonant mass detectors ALLEGRO, AURIGA, EXPLORER and NAUTILUS. The reported results are related to the fourfold observation time from Nov. 6 2005 until Apr. 14 2007, when Allegro ceased its operation. This period overlapped with the first long term observations performed by the LIGO interferometric detectors. The IGEC observations aim at the identification of gravitational wave candidates with high confidence, keeping the false alarm rate at the level of 1 per century, and high duty cycle, namely 57% with all four sites and 94% with at least three sites in simultaneous observation. The network data analysis is based on time coincidence searches over at least three detectors: the four 3-fold searches and the 4-fold one are combined in a logical OR. We exchanged data with the usual blind procedure, by applying a unique confidential time offset to the events in each set of data. The accidental background was investigated by performing sets of 10^8 coincidence analyses per each detector configuration on off-source data, obtained by shifting the time series of each detector. The thresholds of the five searches were tuned so as to control the overall false alarm rate to 1/century. When the confidential time shifts was disclosed, no gravitational wave candidate was found in the on-source data. As an additional output of this search, we make available to other observatories the list of triple coincidence found below search thresholds, corresponding to a false alarm rate of 1/month.

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。

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