致密天体碰撞产生的引力波的高速源定位
High Speed Source Localization in Searches for Gravitational Waves from Compact Object Collisions
摘要：
多信使天文学非常有趣。引力波源的定位速度是电磁跟踪成功与否的关键。虽然目前的引力波源定位方法需要几秒钟的时间，但即使这样也不足以用于某些电磁波段。因此，需要一种更快速的定位方法，即使它不太准确。建立在一个过剩的权力的方法，我们描述了一个新的定位方法紧凑的对象碰撞，产生后验概率图，只有几百毫秒。由于搜索的天空区域大约大$10$倍，因此损失了一些精度。我们想象这种新技术在分层方案中发挥作用，在该方案中，随着更好的分析在更长的时间尺度上完成，快速的早期位置估计被迭代地改进。
英文摘要：
Multi-messenger astronomy is of great interest. The localization speed of gravitational wave sources is important for the success of electromagnetic follow-up. Although current gravitational wave source localization methods take up to a few seconds, even that is not sufficient for some electromagnetic bands. Therefore, one needs a more rapid localization method even if it is less accurate. Building upon an Excess power method, we describe a new localization method for compact object collisions that produces posterior probability maps in only a few hundred milliseconds. Some accuracy is lost, with the searched sky areas being approximately $10$ times larger. We imagine this new technique playing a role in a hierarchical scheme where fast early location estimates are iteratively improved upon as better analyses complete on longer time scales.
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