标题： 宽频X射线光谱分析塞弗特1型星系GRS 1734-292 显示英文标题

标题： Broadband X-ray spectral analysis of the Seyfert 1 galaxy GRS 1734-292

摘要： 我们讨论了通过2009年和2014年分别进行的非同时XMM-Newton和NuSTAR观测获得的GRS 1734-292的宽频X射线谱。 GRS1734-292是一个塞弗特1型星系，位于银河系平面附近，距离为$z=0.0214$。 NuSTAR谱（$3-80$ keV）主要由一个初级幂律连续谱组成，其幂律指数为$\Gamma=1.65 \pm 0.05$，并且有一个高能截止值为$E_c=53^{+11}_{-8}$ keV，这是NuSTAR在塞弗特星系中测量到的最低之一。 康普顿化模型显示冕状等离子体的温度为$kT_e=11.9^{+1.2}_{-0.9}$ keV，并且假设为平板几何结构时光学深度为$\tau=2.98^{+0.16}_{-0.19}$，或者假设为球形几何结构时具有相似的温度和$\tau=6.7^{+0.3}_{-0.4}$。 2009年XMM-Newton的光谱由一个更平坦的固有连续谱（$\Gamma=1.47^{+0.07}_{-0.03}$）和一个由于温暖吸收体产生的Fe\textsc{25}K$\alpha$吸收线很好地描述。两个数据集在$6.4$keV处都显示出适度的铁K$\alpha$发射线以及由于中性核周围物质再处理引起的康普顿反射。 显示英文摘要

摘要： We discuss the broadband X-ray spectrum of GRS 1734-292 obtained from non-simultaneous XMM-Newton and NuSTAR observations, performed in 2009 and 2014, respectively. GRS1734-292 is a Seyfert 1 galaxy, located near the Galactic plane at $z=0.0214$. The NuSTAR spectrum ($3-80$ keV) is dominated by a primary power-law continuum with $\Gamma=1.65 \pm 0.05$ and a high-energy cutoff $E_c=53^{+11}_{-8}$ keV, one of the lowest measured by NuSTAR in a Seyfert galaxy. Comptonization models show a temperature of the coronal plasma of $kT_e=11.9^{+1.2}_{-0.9}$ keV and an optical depth, assuming a slab geometry, $\tau=2.98^{+0.16}_{-0.19}$ or a similar temperature and $\tau=6.7^{+0.3}_{-0.4}$ assuming a spherical geometry. The 2009 XMM-Newton spectrum is well described by a flatter intrinsic continuum ($\Gamma=1.47^{+0.07}_{-0.03}$) and one absorption line due to Fe\textsc{XXV} K$\alpha$ produced by a warm absorber. Both data sets show a modest iron K$\alpha$ emission line at $6.4$ keV and the associated Compton reflection, due to reprocessing from neutral circumnuclear material.