Low-latency Gravitational-wave Alerts for Multimessenger Astronomy during the Second Advanced LIGO and Virgo Observing Run
Low-latency Gravitational-wave Alerts for Multimessenger Astronomy during the Second Advanced LIGO and Virgo Observing Run
复制标题
DOI：
10.3847/1538-4357/ab0e8f
复制
发表时间：
2019-04-20
影响因子：
4.9
通讯作者：
Zweizig, J.
中科院分区：
文献类型：
--
作者：
Abbott, B. P.;Abbott, R.;Zweizig, J.
2016年11月30日至2017年8月25日，高级LIGO的第二次观测运行(O2)，与2017年8月高级处女座的第一次观测相结合，见证了引力波多子星天文学的诞生。有史以来第一次从两颗中子星GW170817和伽马射线对应星GRB 170817A的合并中探测到引力波，导致了对这一事件的电磁跟踪，规模空前。来自世界各地的几个团队寻找GW170817的EM/中微子对应物，为发现光学、X射线和无线电对应物铺平了道路。在这篇文章中，我们描述了在O2期间LIGO和处女座合作的引力波瞬变的在线识别和引力波警报的分布。我们还描述了在警报中发送的引力波观测数据，以实现对其对应对象的搜索。最后，我们概述了在O2期间与观测伙伴共享的在线考生警报。对14个候选者发出了警报，其中6个已被确认为与黑洞或中子星合并有关的引力波事件。在14个警报中，有8个是在数据采集后不到一小时发出的。
Advanced LIGO's second observing run (O2), conducted from 2016 November 30 to 2017 August 25, combined with Advanced Virgo's first observations in 2017 August, witnessed the birth of gravitational-wave multimessenger astronomy. The first ever gravitational-wave detection from the coalescence of two neutron stars, GW170817, and its gamma-ray counterpart, GRB 170817A, led to an electromagnetic follow-up of the event at an unprecedented scale. Several teams from across the world searched for EM/neutrino counterparts to GW170817, paving the way for the discovery of optical, X-ray, and radio counterparts. In this article, we describe the online identification of gravitational-wave transients and the distribution of gravitational-wave alerts by the LIGO and Virgo collaborations during O2. We also describe the gravitational-wave observables that were sent in the alerts to enable searches for their counterparts. Finally, we give an overview of the online candidate alerts shared with observing partners during O2. Alerts were issued for 14 candidates, 6 of which have been confirmed as gravitational-wave events associated with the merger of black holes or neutron stars. Of the 14 alerts, 8 were issued less than an hour after data acquisition.