具有折叠数据的全天空窄带引力波辐射测量
All-sky, narrowband, gravitational-wave radiometry with folded data
摘要：
引力波辐射测量是一种强有力的工具，它通过互相关过程恢复具有未知信号形态的弱信号。已经使用了辐射测量法，例如，搜寻来自已知中子星如天蝎座X-1的持续信号。在本文中，我们演示了如何更雄心勃勃的搜索-从未知的中子星的持续信号-可以有效地进行使用折叠的数据，其中一个完整的~一年之久的观测运行表示为一个单一的恒星日。这里描述的全天空窄带辐射计搜索将提供一种计算上易于处理的方法，以揭示来自双星系统中未知的附近中子星的引力波信号，其调制深度为~0.1-2 Hz。它将同时为来自意外来源的其他持续窄带信号提供灵敏的搜索算法。
英文摘要：
Gravitational-wave radiometry is a powerful tool by which weak signals with unknown signal morphologies are recovered through a process of cross correlation. Radiometry has been used, e.g., to search for persistent signals from known neutron stars such as Scorpius X-1. In this paper, we demonstrate how a more ambitious search--for persistent signals from unknown neutron stars--can be efficiently carried out using folded data, in which an entire ~year-long observing run is represented as a single sidereal day. The all-sky, narrowband radiometer search described here will provide a computationally tractable means to uncover gravitational-wave signals from unknown, nearby neutron stars in binary systems, which can have modulation depths of ~0.1-2 Hz. It will simultaneously provide a sensitive search algorithm for other persistent, narrowband signals from unexpected sources.
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