Observation results by the TAMA300 detector on gravitational wave bursts from stellar-core collapses
Observation results by the TAMA300 detector on gravitational wave bursts from stellar-core collapses
复制标题
DOI：
10.1103/physrevd.71.082002
复制
发表时间：
2004-11
影响因子：
5
通讯作者：
M. Ando;K. Arai;Y. Aso;P. Beyersdorf;K. Hayama;Y. Iida;N. Kanda;S. Kawamura;K. Kondo;N. Mio;S. Miyoki;S. Moriwaki;S. Nagano;K. Numata;S. Sato;K. Somiya;H. Tagoshi;H. Takahashi;R. Takahashi;D. Tatsumi;Y. Tsunesada;Zong-hong Zhu
中科院分区：
文献类型：
--
作者：
M. Ando;K. Arai;Y. Aso;P. Beyersdorf;K. Hayama;Y. Iida;N. Kanda;S. Kawamura;K. Kondo;N. Mio;S. Miyoki;S. Moriwaki;S. Nagano;K. Numata;S. Sato;K. Somiya;H. Tagoshi;H. Takahashi;R. Takahashi;D. Tatsumi;Y. Tsunesada;Zong-hong Zhu
我们目前的数据分析方案和观测结果与TAMA 300引力波探测器，针对爆发信号从星核坍缩事件。在对爆发引力波的分析中，由于没有精确的波形模板，探测和去伪方案与对啁啾波分析的研究不同。我们使用了一个超功率滤波器来提取引力波候选，并提出了两种方法来减少由探测器的非平稳噪声引起的假事件。这些分析方案被应用到真实的数据从TAMA 300干涉引力波探测器。因此，在最好的情况下，假事件减少了约1000倍。此外，为了从天文学的角度解释事件的候选人，我们进行了蒙特-卡罗模拟与假设的银河系事件分布模型和爆发波形从数值模拟的恒星核心崩溃。我们将银河系爆发引力波事件率的上限设定为5.0x10{sup 3}事件/秒，置信度为90%。通过对干涉型引力波探测器观测数据的分析，展示了寻找爆发引力波的前景。
We present data-analysis schemes and results of observations with the TAMA300 gravitational wave detector, targeting burst signals from stellar-core collapse events. In analyses for burst gravitational waves, the detection and fake-reduction schemes are different from well-investigated ones for a chirp wave analysis, because precise waveform templates are not available. We used an excess -power filter for the extraction of gravitational wave candidates, and developed two methods for the reduction of fake events caused by nonstationary noises of the detector. These analysis schemes were applied to real data from the TAMA300 interferometric gravitational wave detector. As a result, fake events were reduced by a factor of about 1000 in the best cases. In addition, in order to interpret the event candidates from an astronomical viewpoint, we performed a Monte-Carlo simulation with an assumed Galactic event distribution model and with burst waveforms obtained from numerical simulations of stellar-core collapses. We set an upper limit of 5.0x10{sup 3} events/sec on the burst gravitational wave event rate in our Galaxy with a confidence level of 90%. This work shows prospects on the search for burst gravitational waves, by establishing an analysis scheme for the observation data from an interferometric gravitational wave detector.