An Early-warning System for Electromagnetic Follow-up of Gravitational-wave Events
An Early-warning System for Electromagnetic Follow-up of Gravitational-wave Events
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DOI：
10.3847/2041-8213/abc753
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发表时间：
2020-08
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通讯作者：
S. Sachdev;R. Magee;C. Hanna;K. Cannon;L. Singer;J. Sk;D. Mukherjee;S. Caudill;C. Chan;J. Creighton;B. Ewing;H. Fong;P. Godwin;R. Huxford;S. Kapadia;A. Li;Rico Ka Lok Lo;D. Meacher;C. Messick;S. Mohite;A. Nishizawa;H. Ohta;A. Pace;A. Reza;B. Sathyaprakash;M. Shikauchi;Divya Singh;L. Tsukada;D. Tsuna;T. Tsutsui;K. Ueno
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文献类型：
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作者：
S. Sachdev;R. Magee;C. Hanna;K. Cannon;L. Singer;J. Sk;D. Mukherjee;S. Caudill;C. Chan;J. Creighton;B. Ewing;H. Fong;P. Godwin;R. Huxford;S. Kapadia;A. Li;Rico Ka Lok Lo;D. Meacher;C. Messick;S. Mohite;A. Nishizawa;H. Ohta;A. Pace;A. Reza;B. Sathyaprakash;M. Shikauchi;Divya Singh;L. Tsukada;D. Tsuna;T. Tsutsui;K. Ueno
在设计灵敏度下，双中子星在先进激光干涉仪引力波天文台（LIGO）和处女座探测器的波段上停留的时间将达到10-15分钟。原则上，引力波（GW）数据的匹配滤波可以积累足够的信噪比（S/N），从而在伴星碰撞合并前几十秒识别即将发生的事件。在这里，我们报告了预警GW检测管道的设计和测试。可以对红移足够低的源产生预警警报，以便在合并前积累足够大的S/N ~ 10-60 S。我们发现大约7%（49%）的可探测到的BNS合并将在合并前60秒（10秒）被探测到。在所有可探测到的BNS合并中，约有2%将在合并前被探测到，并定位在100度2以内（90%可信区间）。几架宽视场望远镜的协同观测可以在合并前后几秒钟捕捉到这一事件。设计灵敏度的LIGO-Virgo探测器可以在合并开始时至少观测到一个事件。
Binary neutron stars (BNSs) will spend ≃10–15 minutes in the band of Advanced Laser Interferometer Gravitational-Wave Observatory (LIGO) and Virgo detectors at design sensitivity. Matched-filtering of gravitational-wave (GW) data could in principle accumulate enough signal-to-noise ratio (S/N) to identify a forthcoming event tens of seconds before the companions collide and merge. Here we report on the design and testing of an early-warning GW detection pipeline. Early-warning alerts can be produced for sources that are at low enough redshift so that a large enough S/N accumulates ∼10–60 s before merger. We find that about 7% (49%) of the total detectable BNS mergers will be detected 60 s (10 s) before the merger. About 2% of the total detectable BNS mergers will be detected before merger and localized to within 100 deg2 (90% credible interval). Coordinated observing by several wide-field telescopes could capture the event seconds before or after the merger. LIGO–Virgo detectors at design sensitivity could facilitate observing at least one event at the onset of merger.