Methods and results of a search for gravitational waves associated with gamma-ray bursts using the GEO 600, LIGO, and Virgo detectors
Methods and results of a search for gravitational waves associated with gamma-ray bursts using the GEO 600, LIGO, and Virgo detectors
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DOI：
10.1103/physrevd.89.122004
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发表时间：
2014-06-25
影响因子：
5
通讯作者：
Zweizig, J.
中科院分区：
文献类型：
--
作者：
Aasi, J.;Abbott, B. P.;Zweizig, J.
本文报道了利用GEO600和一台LIGO或VIGO探测器寻找与伽马射线暴有关的赫兹-1792赫兹频率范围内的短时引力波暴的工作。我们介绍了线性搜索网格的方法来分析具有大的天空局部化不确定性的伽玛暴事件，例如费米伽马射线暴监视器(GBM)提供的局部化。当引力波的天空位置没有被很好地定位时，对引力波的相干搜索可能是计算密集型的，这是由于探测器之间的到达时间差异所需的校正。使用线性搜索网格，对于GBM事件，我们能够将分析的计算成本降低O(10)倍。此外，我们还证明，如果同时观测到高频GW信号，我们的分析管道可以改进GBM探测到的伽玛暴的天空局部化。我们使用线性网格的方法来搜索与2006至2011年间观测到的129个伽马暴的伽马射线实验相关的GW。我们样本中的伽玛暴之前没有分析过GW对应物。当探测器使用压缩光态来提高其灵敏度时，我们使用来自GEO 600的数据来分析我们的部分GRB事件；这是第一次使用来自压缩光干涉天文台的数据来搜索GRB。我们没有发现GW信号的证据，无论是这个样本中的任何一个GRB个体，还是整个群体。对于每个伽玛暴，我们在固定的GW发射能量为10(-2)M圆点c(2)的假设下，对到祖先的距离设定了下限，500赫兹的发射的中位数排除距离为0.8Mpc，1 khz的中位数排除距离为0.3mpc。一旦先进的LIGO和处女座探测器开始运行，与线性搜索网格相关的降低的计算成本将使快速搜索与费米GBM事件相关的GW成为可能。
In this paper we report on a search for short-duration gravitational wave bursts in the frequency range 64 Hz-1792 Hz associated with gamma-ray bursts (GRBs), using data from GEO 600 and one of the LIGO or Virgo detectors. We introduce the method of a linear search grid to analyze GRB events with large sky localization uncertainties, for example the localizations provided by the Fermi Gamma-ray Burst Monitor (GBM). Coherent searches for gravitational waves (GWs) can be computationally intensive when the GRB sky position is not well localized, due to the corrections required for the difference in arrival time between detectors. Using a linear search grid we are able to reduce the computational cost of the analysis by a factor of O(10) for GBM events. Furthermore, we demonstrate that our analysis pipeline can improve upon the sky localization of GRBs detected by the GBM, if a high-frequency GW signal is observed in coincidence. We use the method of the linear grid in a search for GWs associated with 129 GRBs observed satellite-based gamma-ray experiments between 2006 and 2011. The GRBs in our sample had not been previously analyzed for GW counterparts. A fraction of our GRB events are analyzed using data from GEO 600 while the detector was using squeezed-light states to improve its sensitivity; this is the first search for GWs using data from a squeezed-light interferometric observatory. We find no evidence for GW signals, either with any individual GRB in this sample or with the population as a whole. For each GRB we place lower bounds on the distance to the progenitor, under an assumption of a fixed GW emission energy of 10(-2)M circle dot c(2), with a median exclusion distance of 0.8 Mpc for emission at 500 Hz and 0.3 Mpc at 1 kHz. The reduced computational cost associated with a linear search grid will enable rapid searches for GWs associated with Fermi GBM events once the advanced LIGO and Virgo detectors begin operation.