Liverpool Telescope follow-up of candidate electromagnetic counterparts during the first run of Advanced LIGO
Liverpool Telescope follow-up of candidate electromagnetic counterparts during the first run of Advanced LIGO
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DOI：
10.1093/mnras/stw1849
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发表时间：
2016-06
影响因子：
4.8
通讯作者：
C. Copperwheat;I. Steele;A. Piascik;D. Bersier;M. Bode;C. Collins;M. Darnley;D. Galloway;A. Gomboc;A. Gomboc;S. Kobayashi;G. Lamb;A. Levan;P. Mazzali;C. Mundell;E. Pian;E. Pian;E. Pian;D. Pollacco;D. Steeghs;D. Steeghs;N. Tanvir;K. Ulaczyk;K. Wiersema
中科院分区：
文献类型：
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作者：
C. Copperwheat;I. Steele;A. Piascik;D. Bersier;M. Bode;C. Collins;M. Darnley;D. Galloway;A. Gomboc;A. Gomboc;S. Kobayashi;G. Lamb;A. Levan;P. Mazzali;C. Mundell;E. Pian;E. Pian;E. Pian;D. Pollacco;D. Steeghs;D. Steeghs;N. Tanvir;K. Ulaczyk;K. Wiersema
2015年底，先进的LIGO探测器首次直接探测到引力波。通过事先安排，在第一次科学运行期间，一个全球合作的电磁跟踪观测者被通知候选引力波事件，许多设施参与寻找对应的引力波事件。没有对应物被确定，这符合预期，因为这些事件被归类为黑洞-黑洞合并。然而，这些搜索为未来引力波探测器科学运行的类似后续活动奠定了基础，在这些活动中，更有可能探测到中子星合并事件与可观测到的电磁对应物。在2015年9月至2016年1月的第一次科学运行期间，对电磁合作发出了三次警报。其中两个预警与引力波事件有关，分别被命名为GW150914和GW151226。在本文中，我们概述了利物浦望远镜在这一时期对后续活动的贡献。考虑到任何引力波事件的天空位置都有数百平方度的不确定性，有效地寻找候选对应点需要具有大（~度）视场的巡天望远镜。利物浦望远镜的作用是为任何候选天体提供后续分类光谱。我们跟踪了与所有三个警报相关的候选人，分别观察了1、9和17个候选人。我们把观测到的大部分瞬变天体归类为超新星。
The first direct detection of gravitational waves was made in late 2015 with the Advanced LIGO detectors. By prior arrangement, a worldwide collaboration of electromagnetic follow-up observers were notified of candidate gravitational wave events during the first science run, and many facilities were engaged in the search for counterparts. No counterparts were identified, which is in line with expectations given that the events were classified as black hole - black hole mergers. However these searches laid the foundation for similar follow-up campaigns in future gravitational wave detector science runs, in which the detection of neutron star merger events with observable electromagnetic counterparts is much more likely. Three alerts were issued to the electromagnetic collaboration over the course of the first science run, which lasted from September 2015 to January 2016. Two of these alerts were associated with the gravitational wave events since named GW150914 and GW151226. In this paper we provide an overview of the Liverpool Telescope contribution to the follow-up campaign over this period. Given the hundreds of square degree uncertainty in the sky position of any gravitational wave event, efficient searching for candidate counterparts required survey telescopes with large (~degrees) fields-of-view. The role of the Liverpool Telescope was to provide follow-up classification spectroscopy of any candidates. We followed candidates associated with all three alerts, observing 1, 9 and 17 candidates respectively. We classify the majority of the transients we observed as supernovae.