论文标题
通过Nustar观察探测NGC 1068中埋入AGN的周围吸收介质
Probing the circumnuclear absorbing medium of the buried AGN in NGC 1068 through NuSTAR observations
论文作者
论文摘要
我们介绍了Compton Thick-Seyfert 2 Galaxy NGC 1068的最新Nustar监测活动的结果，该活动由2017年7月至2018年2月之间进行的四个$ \ sim $ 50 ks观测组成，以搜索1到6个月的时间标准的磁带和光谱变化。我们分别检测到一个揭幕和一个截灭事件，分别少于27和91天，归因于Compton-Thick-thick材料，$ n_h =（1.8 \ pm0.8）\ times10^{24} $ cm $ $ cm $^{ - 2} $ cm $^{ - 2} $穿过我们的视线。这种气体可能位于圆环的最内向或进一步的内部，因此提供了进一步的证据，证明了该来源中周围核物质的块状结构。利用同时迅速的观察，我们还从NGC 1068的核区域中检测到了新的燃烧ULX，以$ d \ sim $ 30英寸（即$ \ sim $ 2 kpc）的距离，其峰值X射线峰值固有的亮度为$（3.0凯夫乐队。
We present the results of the latest NuSTAR monitoring campaign of the Compton-thick Seyfert 2 galaxy NGC 1068, composed of four $\sim$50 ks observations performed between July 2017 and February 2018 to search for flux and spectral variability on timescales from 1 to 6 months. We detect one unveiling and one eclipsing event with timescales less than 27 and 91 days, respectively, ascribed to Compton-thick material with $N_H=(1.8\pm0.8)\times10^{24}$ cm$^{-2}$ and $N_H\geq(2.4\pm0.5)\times10^{24}$ cm$^{-2}$ moving across our line of sight. This gas is likely located in the innermost part of the torus or even further inward, thus providing further evidence of the clumpy structure of the circumnuclear matter in this source. Taking advantage of simultaneous Swift-XRT observations, we also detected a new flaring ULX, at a distance $d\sim$30" (i.e. $\sim$2 kpc) from the nuclear region of NGC 1068, with a peak X-ray intrinsic luminosity of $(3.0\pm0.4)\times10^{40}$ erg s$^{-1}$ in the 2-10 keV band.
