ASAS-SN search for optical counterparts of gravitational-wave events from the third observing run of Advanced LIGO/Virgo
ASAS-SN search for optical counterparts of gravitational-wave events from the third observing run of Advanced LIGO/Virgo
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ASAS-SN 从 Advanced LIGO/Virgo 第三次观测中寻找引力波事件的光学对应物
DOI：
10.1093/mnras/stab3141
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发表时间：
2021
影响因子：
4.8
通讯作者：
Holmbo, S
中科院分区：
文献类型：
--
作者：
de Jaeger, T;Shappee, B J;Kochanek, C S;Stanek, K Z;Beacom, J F;Holoien, T W-S;Thompson, Todd A;Franckowiak, A;Holmbo, S
我们报告了在激光干涉仪引力波天文台 (LIGO)-处女座协作 (LVC) 与超新星全天自动巡天 (ASAS-SN) 的第三次观测运行 (O3) 期间，寻找九个引力波事件的电磁对应物，其中包含中子星的概率 >60%。没有发现与引力波事件相关的光学对应物。然而，由于其望远镜网络，在触发后的前 10 小时内，至少一个 ASAS-SN 站点的可见平均区域包含约 30% 的综合源定位概率。通过正常操作和机会目标观测的结合，ASAS-SN 在四个事件触发后 1 小时内开始对最高概率场进行观测。 24 小时后，ASAS-SN 观察到三个事件的总概率 >60%，除了其中一个事件之外的所有事件的总概率 >40%。这是九个事件中七个事件的已发布覆盖统计数据的所有调查中深度为 g= 18.5 mag 的最大区域覆盖范围。凭借其观测策略、遍布全球的五个站点和大视野，ASAS-SN 将成为 LVC 第四次观测运行 (O4) 期间光学搜索附近中子星合并的领先巡天之一。
We report on the search for electromagnetic counterparts to the nine gravitational-wave events with a >60 per cent probability of containing a neutron star during the third observing run (O3) of the Laser Interferometer Gravitational-Wave Observatory (LIGO)–Virgo Collaboration (LVC) with the All-Sky Automated Survey for SuperNovae (ASAS-SN). No optical counterparts associated with a gravitational-wave event were found. However, thanks to its network of telescopes, the average area visible to at least one ASAS-SN site during the first 10 h after the trigger contained ∼30 per cent of the integrated source location probability. Through a combination of normal operations and target-of-opportunity observations, ASAS-SN observations of the highest probability fields began within 1 h of the trigger for four of the events. After 24 h, ASAS-SN observed >60 per cent of total probability for three events and >40 per cent for all but one of the events. This is the largest area coverage to a depth ofg= 18.5 mag from any survey with published coverage statistics for seven of the nine events. With its observing strategy, five sites around the world, and a large field of view, ASAS-SN will be one of the leading surveys to optically search for nearby neutron star mergers during LVC fourth observation run (O4).