论文标题
搜索紧凑型二进制合并GW190814的光学和近红外对应物
A search for optical and near-infrared counterparts of the compact binary merger GW190814
论文作者
论文摘要
我们在2019年8月14日由Advanced Ligo和Advanced Pirgo探测器检测到的紧凑型二进制合并GW190814的观察活动报告。该信号具有任何观察到的引力波（GW）源的最佳定位，其概率为18.5度$^2 $，并且估计为90％的概率面积为18.5 veg $^2 $，并且估计为240 mpc。我们通过DECA度量瞬态成像仪（DDOTI）获得了宽阔的观测值，覆盖了概率面积的88％，至限制幅度为$ W $ = 19.9 AB。较高概率区域内的附近星系是用Lowell Discovery望远镜（LDT）瞄准的，而有希望的候选对应物是通过多彩色光度法和瞬态化和瞬态红外（Ratir）和光谱与Gran望远镜DeScopio de Canarias（GTC）（GTC）来表征的。我们将光学和近红外限制与社区获得的上限结合在一起来限制与合并相关的可能的电磁对应物。多波长数据集沿着射流轴沿其射流轴看到的伽马射线爆发不散，而在较大的视角下看到的爆发的存在并没有得到很好的约束。尽管我们的观察结果对类似于AT2017GFO的Kilonova并不敏感，但我们可以排除高质量（> 0.1 m $ _ {\ odot} $）快速变化（平均速度> = 0.3C）风弹风，以使可能与此合并相关的基洛诺夫。
We report on our observing campaign of the compact binary merger GW190814, detected by the Advanced LIGO and Advanced Virgo detectors on August 14th, 2019. This signal has the best localisation of any observed gravitational wave (GW) source, with a 90% probability area of 18.5 deg$^2$, and an estimated distance of ~ 240 Mpc. We obtained wide-field observations with the Deca-Degree Optical Transient Imager (DDOTI) covering 88% of the probability area down to a limiting magnitude of $w$ = 19.9 AB. Nearby galaxies within the high probability region were targeted with the Lowell Discovery Telescope (LDT), whereas promising candidate counterparts were characterized through multi-colour photometry with the Reionization and Transients InfraRed (RATIR) and spectroscopy with the Gran Telescopio de Canarias (GTC). We use our optical and near-infrared limits in conjunction with the upper limits obtained by the community to constrain the possible electromagnetic counterparts associated with the merger. A gamma-ray burst seen along its jet's axis is disfavoured by the multi-wavelength dataset, whereas the presence of a burst seen at larger viewing angles is not well constrained. Although our observations are not sensitive to a kilonova similar to AT2017gfo, we can rule out high-mass (> 0.1 M$_{\odot}$) fast-moving (mean velocity >= 0.3c) wind ejecta for a possible kilonova associated with this merger.
