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arXiv 1901.08474astro-ph.HE
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用DLT40巡天第二次高级LIGO/VIRGO观测运行期间引力波事件的光学跟踪

Optical follow-up of gravitational wave events during the second advanced LIGO/VIRGO observing run with the DLT40 Survey

Sheng Yang, David J. Sand, Stefano Valenti, Enrico Cappellaro, Leonardo Tartaglia, Samuel Wyatt, Alessandra Corsi, Daniel E. Reichart, Joshua Haislip, Vladimir Kouprianov

摘要:

我们描述了GW的后续策略和DLT 40在LVC的第二次科学运行(O2)期间的后续结果。根据GW警报中提供的信息以及LVC发送的定位地图,DLT 40将迅速响应,对我们的排名算法选择的相应星系进行成像,以便实时搜索可能的EM对应物。在LVC O2运行期间,DLT 40跟踪了10个GW触发器,在每个事件的GW定位区域内观测了$\sim$ 20-100个星系。从这次活动中,我们确定了两个真正的瞬态源在GW本地化与适当的源时间-一个是无关的Ia型超新星(SN~ 2017 cbv),另一个是光学千诺瓦,AT 2017 fgo/SSS 17 a/DLT 17 ck,与双中子星合并GW 170817(又名伽马射线暴GRB 170817 A)。最后,我们讨论了DLT 40调查的计划,为即将到来的LVC O3运行,其中包括扩大我们的星系搜索领域到$D\approx$ 65 Mpc,以匹配LVC的计划的三个探测器的灵敏度二元中子星合并。

英文摘要:

We describe the GW follow-up strategy and subsequent results of the DLT40 during the second science run (O2) of the LVC. Depending on the information provided in the GW alert together with the localization map sent by the LVC, DLT40 would respond promptly to image the corresponding galaxies selected by our ranking algorithm in order to search for possible EM counterparts in real time. During the LVC O2 run, DLT40 followed ten GW triggers, observing between $\sim$20-100 galaxies within the GW localization area of each event. From this campaign, we identified two real transient sources within the GW localizations with an appropriate on-source time -- one was an unrelated type Ia supernova (SN~2017cbv), and the other was the optical kilonova, AT 2017fgo/SSS17a/DLT17ck, associated with the binary neutron star coalescence GW170817 (a.k.a gamma-ray burst GRB170817A). We conclude with a discussion of the DLT40 survey's plans for the upcoming LVC O3 run, which include expanding our galaxy search fields out to $D\approx$65 Mpc to match the LVC's planned three-detector sensitivity for binary neutron star mergers.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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