论文标题
Compton厚的Seyfert 2 Galaxy NGC 1068的X射线光谱和定时分析
X-ray spectral and timing analysis of the Compton Thick Seyfert 2 galaxy NGC 1068
论文作者
论文摘要
我们介绍了使用{\ it nustar}和{\ it xmm-newton}观察到的Compton厚Seyfert 2活性银河核NGC 1068的定时和光谱分析。在这项工作中,我们首次计算了源的冠状温度($ \ rm {kt_ {e}} $),并检查了时代之间的变化(如果有)。这项工作中分析的数据包括(a)在2012年12月至2017年11月期间进行的{\ it nustar}的八个观测时期,以及(b)六个时期的观察到{\ it xmm-newton}的观察时期,在2000年7月至2015年7月在2015年7月进行了启用,以确定任何定时分析。软带中的变化。然而,在2014年8月和2017年8月在20 KEV以上的Energies的通量检查时,该来源分别更明亮约20 \%和30 \%,与2012年三个{\ it Nustar}观察的平均通量相比,与早期的文献结果一致,这一源源更加明亮。从对{\ it xmm-newton}数据的分析中,我们发现了时期和时期内的硬频段(2 $ - $ 4 keV)的变化。在软乐队(0.2 $ -2 $ 2 keV)中,而源在时期内的源并不可变,发现它相对于时期A中的e时期A中更明亮。通过拟合物理模型,我们确定了$ \ rm {kt_ {e}} $,范围为8.46 $^{+0.39} {+0.39} _ {+0.39} _ { - 0.66 $ { - 0.66} $ { - { - 0.66} $ { - { - { - 0.66} $ { - {-0.66}; 9.13 $^{+0.63} _ { - 0.98} $ kev。从我们的分析中,我们得出结论,我们在源中没有发现$ \ rm {kt_ {e}} $的变化。
We present the timing and spectral analysis of the Compton Thick Seyfert 2 active galactic nuclei NGC 1068 observed using {\it NuSTAR} and {\it XMM-Newton}. In this work for the first time we calculated the coronal temperature ($\rm{kT_{e}}$) of the source and checked for its variation between the epochs if any. The data analysed in this work comprised of (a) eight epochs of observations with {\it NuSTAR} carried out during the period December 2012 to November 2017, and, (b) six epochs of observations with {\it XMM-Newton} carried out during July 2000 to February 2015. From timing analysis of the {\it NuSTAR} observations, we found the source not to show any variations in the soft band. However, on examination of the flux at energies beyond 20 keV, during August 2014 and August 2017 the source was brighter by about 20\% and 30\% respectively compared to the mean flux of the three 2012 {\it NuSTAR} observations as in agreement with earlier results in literature. From an analysis of {\it XMM-Newton} data we found no variation in the hard band (2 $-$ 4 keV) between epochs as well as within epochs. In the soft band (0.2 $-$ 2 keV), while the source was found to be not variable within epochs, it was found to be brighter in epoch B relative to epoch A. By fitting physical models we determined $\rm{kT_{e}}$ to range between 8.46$^{+0.39}_{-0.66}$ keV and 9.13$^{+0.63}_{-0.98}$ keV. From our analysis, we conclude that we found no variation of $\rm{kT_{e}}$ in the source.