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arXiv 2103.02399astro-ph.HE
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GW190814后续与光学望远镜MeerLICHT

GW190814 follow-up with the optical telescope MeerLICHT

S. de Wet, P. J. Groot, S. Bloemen, R. Le Poole, M. Klein-Wolt, E. Körding, V. McBride, K. Paterson, D. L. A. Pieterse, P. M. Vreeswijk, P. Woudt

摘要:

高级LIGO和Virgo引力波天文台在2019年8月14日的第三次观测运行中检测到一个信号,名为GW 190814。大量的电磁设施进行了后续活动,在寻找一个可能的对应的引力波事件,这是特别有前途的早期来源分类的中子星-黑洞merger. We提出的GW的后续活动的结果与宽视场光学望远镜MeerLICHT,位于南非天文台萨瑟兰网站。我们使用我们的结果来约束可能的kilonova模型。MeerLICHT在三个光学波段(u,q,i)中每晚观察到超过95%的概率定位超过一周,我们的初始观察在GW检测后近2小时开始。我们描述了在MeerLICHT数据中寻找新的瞬变,并研究了如何使用我们的极限幅度来约束AT2017gfo样kilonova。在我们对MeerLICHT数据的分析中发现了一个新的瞬变,由于档案数据中瞬变坐标处存在空间未解析源,因此我们将其排除在GW 190814的电磁对应物之外。使用我们的极限幅度,我们可以排除在GW 190814距离处存在AT 2017 gfo样kilonova的置信度很低($<10^{-4}$)。

英文摘要:

The Advanced LIGO and Virgo gravitational wave observatories detected a signal on 2019 August 14 during their third observing run, named GW190814. A large number of electromagnetic facilities conducted follow-up campaigns in the search for a possible counterpart to the gravitational wave event, which was made especially promising given the early source classification of a neutron star-black hole merger.We present the results of the GW follow-up campaign taken with the wide-field optical telescope MeerLICHT, located at the South African Astronomical Observatory Sutherland site. We use our results to constrain possible kilonova models. MeerLICHT observed more than 95% of the probability localisation each night for over a week in three optical bands (u,q,i) with our initial observations beginning almost 2 hours after the GW detection. We describe the search for new transients in MeerLICHT data and investigate how our limiting magnitudes can be used to constrain an AT2017gfo-like kilonova. A single new transient was found in our analysis of MeerLICHT data, which we exclude from being the electromagnetic counterpart to GW190814 due to the existence of a spatially unresolved source at the transient's coordinates in archival data. Using our limiting magnitudes, the confidence with which we can exclude the presence of an AT2017gfo-like kilonova at the distance of GW190814 was low ($<10^{-4}$).

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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