发表机构
Center for Computational Relativity and Gravitation, Rochester Institute of Technology; University of Texas, Austin; Cardiff University(罗切斯特理工学院相对论与引力计算中心; 德克萨斯大学奥斯汀分校; 卡迪夫大学)
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
针对第三代引力波探测器高信噪比和复杂响应,扩展RIFT流程,实现任意波形模型下双中子星信号的高精度定位,信噪比1000时定位精度达0.8e-3平方度。
AI 中文摘要
第三代引力波探测器观测到的致密双星信号,因其信噪比通常高达数百至数千,以及地球自转和探测器大尺度物理延伸导致的时变和频变探测器响应,其解释变得复杂。在先前为LISA所做工作的基础上,我们实现了RIFT参数估计流程的通用且稳健的扩展,使其能够使用任何现有波形模型来解释这些源,无需借助诸如降阶近似或归一化流之类的中间预训练数据产品。我们演示了在三站点下一代网络中,对有限尺寸双中子星注入信号的端到端恢复,信噪比达到1000,在单个GPU上数分钟内将源的 extrinsic 参数定位到 $0.8\times10^{-3}$ 平方度。
英文摘要
Interpretation of compact binary signals observed by third-generation gravitational-wave detectors is complicated by their high signal-to-noise ratios, often reaching hundreds to thousands, and by time- and frequency-dependent detector responses arising from Earth's rotation and the detectors' large physical extent. Building on prior work for LISA, we implement generic, robust extensions of the RIFT parameter estimation pipeline that enable interpretation of these sources using any existing waveform model, without recourse to intermediate pretrained data products like reduced-order approximations or normalizing flows. We demonstrate end-to-end recovery of finite-size binary-neutron-star injections in a three-site next-generation network to $\mathrm{SNR}=1000$, localizing the source's extrinsic parameters to $0.8\times10^{-3}\,\mathrm{deg}^2$ in minutes on a single GPU.