用于探测和表征引力波余辉的状态空间建模
State Space Modelling for detecting and characterising Gravitational Waves afterglows
AI总结：
本文将状态空间模型引入射电时间序列天文学，以表征光变斜率、上升和衰减，并解决活动星系宿主中暂现源及 GW170817 类引力波余辉的探测与分类问题。
摘要：
我们提出使用一种创新方法来筛选暂现源和变源。这些辐射源在电磁波谱中从无线电波到伽马射线的不同波长上被探测到。我们聚焦于射电信号，并使用状态空间模型（State Space Models），该模型也被称为动态线性模型（Dynamic Linear Models）。状态空间模型（以及更一般的参数化自回归模型）多年来一直是经济建模的主要工具，但在天体物理学中却很少使用。目前用于识别射电变源和暂现源的统计方法不够精密，无法区分不同类型的光变。这些方法只能给出光变的整体调制及其显著性，数据在时间上的先后顺序并不重要。状态空间模型要先进得多，不仅能够编码光变的幅度和显著性，还能编码给定时间 t 的斜率、上升或下降等属性。在本工作中，我们评估了状态空间模型在时间序列天文学中用于暂现源和变源探测（包括分类）的有效性。我们还提出了一种方法，用于探测位于活动变星系中的暂现源；在这种情况下，静态宿主星系的时间序列与星系内暂现源的动态特性相互交织。此外，我们考察了一个假设情景，即我们想要探测的目标暂现源是引力波源 GW170817（或类似天体）。
英文摘要：
We propose the usage of an innovative method for selecting transients and variables. These sources are detected at different wavelengths across the electromagnetic spectrum spanning from radio waves to gamma-rays. We focus on radio signals and use State Space Models, which are also referred to as Dynamic Linear Models. State Space Models (and more generally parametric autoregressive models) have been the mainstay of economic modelling for some years, but rarely they have been used in Astrophysics. The statistics currently used to identify radio variables and transients are not sophisticated enough to distinguish different types of variability. These methods simply report the overall modulation and significance of the variability, and the ordering of the data in time is insignificant. State Space Models are much more advanced and can encode not only the amount and significance of the variability but also properties, such as slope, rise or decline for a given time t. In this work, we evaluate the effectiveness of State Space Models for transient and variable detection including classification in time-series astronomy. We also propose a method for detecting a transient source hosted in a variable active galaxy, whereby the time-series of a static host galaxy and the dynamic nature of the transient in the galaxy are intertwined. Furthermore, we examine the hypothetical scenario where the target transient we want to detect is the gravitational wave source GW170817 (or similar).
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。
