First Demonstration of Early Warning Gravitational-wave Alerts
First Demonstration of Early Warning Gravitational-wave Alerts
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DOI：
10.3847/2041-8213/abed54
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发表时间：
2021-04-01
影响因子：
7.9
通讯作者：
Zweizig, John
中科院分区：
文献类型：
--
作者：
Magee, Ryan;Chatterjee, Deep;Zweizig, John
在 Advanced LIGO-Virgo 最近结束的第三次观测中，引力波观测变得司空见惯。近实时确定并公开宣布了 56 名未撤回候选人。然而，双中子星合并产生的引力波仍然受到特别关注，因为它们可能是伽马射线暴和千新星等高能天体物理现象的前兆。虽然晚期电磁发射提供了有关天体物理过程的重要信息，但瞬时发射和引力波独特地揭示了合并期间和合并后几秒钟内的极端物质和重力。引力波数据中源位置和属性的快速通信对于促进多信使对此类源的后续跟踪至关重要。如果通过早期预警（合并前）警报预先警告合作伙伴设施，则尤其可以启用此功能。在这里，我们描述了 LIGO-Virgo 内这种低延迟基础设施的调试和性能。我们展示了端到端模拟数据挑战的结果，该挑战检测双中子星合并并在合并前向合作伙伴设施发出警报。我们在未来的观测运行中对这些警报设定了期望。
Gravitational-wave observations became commonplace in Advanced LIGO-Virgo's recently concluded third observing run. 56 nonretracted candidates were identified and publicly announced in near real time. Gravitational waves from binary neutron star mergers, however, remain of special interest since they can be precursors to high-energy astrophysical phenomena like gamma-ray bursts and kilonovae. While late-time electromagnetic emissions provide important information about the astrophysical processes within, the prompt emission along with gravitational waves uniquely reveals the extreme matter and gravity during-and in the seconds following-merger. Rapid communication of source location and properties from the gravitational-wave data is crucial to facilitate multimessenger follow-up of such sources. This is especially enabled if the partner facilities are forewarned via an early warning (pre-merger) alert. Here we describe the commissioning and performance of such a low-latency infrastructure within LIGO-Virgo. We present results from an end-to-end mock data challenge that detects binary neutron star mergers and alerts partner facilities before merger. We set expectations for these alerts in future observing runs.