标题： 利用跨探测器参数一致性度量来提高引力波搜寻的灵敏度 显示英文标题

标题： Leveraging cross-detector parameter consistency measures to enhance sensitivities of gravitational wave searches

摘要： 由于噪声瞬变的存在，全天空搜索一般的短时长天体物理引力波瞬变通常具有挑战性。 为LIGO科学合作组织、Virgo和KAGRA（LVK）探测器的引力波瞬变搜索开发新的信噪比判别器至关重要。 在这项工作中，我们采用了一种最近开发的基于Jensen-Shannon散度（JSD）的测量方法，该方法评估跨探测器参数的一致性，以区分弱建模或未建模的天体物理引力波信号与响亮的噪声触发器。 首先，我们将早期工作中的基于2个探测器的JSD测量方法扩展到一个3个探测器网络。 我们利用这一点来修改现有的相干波束(cWB)-高斯混合建模(GMM)算法的测试统计量，以提高对特定波形（如正弦高斯波、高斯脉冲和白噪声爆发）的搜索灵敏度。 我们发现，使用我们称为cWB-GMM-JSD的新方法，在由LHO和LLO探测器组成的双探测器网络中，对于IFAR为10年的自定义波形（由$h_{\mathrm{rss50}}$表示）的灵敏度提高了$\sim 10-20 \%$，而在由LHO、LLO和Virgo探测器组成的三探测器网络中，同样条件下提高了$\sim 5-10 \%$。 最后，我们在LIGO和Virgo探测器的第三次观测运行（O3）的公开数据修订数据分析管道中应用了修改后的统计量。 尽管我们在O3数据中没有发现新的事件，但我们看到大多数已知的GW事件的统计显著性有显著上升，这进一步验证了灵敏度的提升。 显示英文摘要

摘要： All-sky searches for generic short-duration astrophysical GW transients are often challenging because of noise transients. Developing novel signal-noise discriminators is crucial for GW transient searches with LIGO Scientific, Virgo, and KAGRA (LVK) detectors. In this work, we adapt a recently developed Jensen Shannon divergence (JSD)-based measure, which assesses the cross-detector parameter consistency to distinguish between weakly modeled or unmodelled astrophysical GW signals and loud noise triggers. We first extend a 2-detector JSD-based measure, developed in an earlier work, to a 3-detector network. We leverage this to modify the test statistic of the existing Coherent Waveburst (cWB)-Gaussian Mixture Modelling (GMM) algorithm for short-duration transients towards improving the search sensitivity to ad-hoc waveforms like Sine-Gaussians, Gaussian Pulses, and White Noise Bursts. We find that with the new method, which we term cWB-GMM-JSD, the sensitivity to the ad-hoc waveforms, given by $h_{\mathrm{rss50}}$, improves by $\sim 10-20 \%$ at an IFAR of 10 years for the 2-detector network consisting of LHO and LLO detectors, and by $\sim 5-10 \%$ at the same IFAR for the 3-detector network consisting of LHO, LLO and Virgo detectors. Finally, we apply the modified statistic in the revised data analysis pipeline on the publicly available data from the third observing run (O3) of the LIGO and Virgo detectors. Although we do not find any new event in the O3 data, we see a notable rise in the statistical significance of most of the known GW events, which further testifies to the enhancement in sensitivities.