利用 SKYFAST 改进引力波宿主定位：快速体积与倾角角 reconstruction
摘要
引力波事件 GW170817 的科学影响力强烈支持了对引力波事件候选对象的高效电磁跟随行动的必要性。此类行动的成功性高度依赖于对源体的快速且准确的定位。本文介绍了 SKYFAST，这是一个用于快速定位引力波事件宿主的新型管道。SKYFAST 与完整参数估计（PE）算法并行运行，从中提取后验样本。它利用这些样本通过 Dirichlet Process Gaussian 混合模型（一种贝叶斯非参数方法）来重构天空位置、亮度距离和倾角角的解析后验分布。这种方法允许我们仅使用完整 PE 分析产生的样本量的一小部分即可获得准确的事件定位。 Depending on the PE algorithm employed, this can lead to significant time savings, which is crucial for identifying the electromagnetic counterpart. Additionally, in a few minutes, SKYFAST generates a ranked list of the most probable galaxy hosts from a galaxy catalog of choice. This list includes information on the inclination angle posterior conditioned to the position of each candidate host, which is useful for assessing the detectability of gamma-ray burst structured jet emissions.
引用
@article{arxiv.2407.13695,
title = {Enhancing gravitational-wave host localization with SKYFAST: rapid volume and inclination angle reconstruction},
author = {Gabriele Demasi and Giulia Capurri and Angelo Ricciardone and Barbara Patricelli and Massimo Lenti and Walter Del Pozzo},
journal= {arXiv preprint arXiv:2407.13695},
year = {2025}
}
备注
10 pages, 9 figures