标题： 盖亚GraL：盖亚DR2引力透镜系统。 第七部分。 XMM-Newton观测透镜化类星体 显示英文标题

标题： Gaia GraL: Gaia DR2 Gravitational Lens Systems. VII. XMM-Newton Observations of Lensed Quasars

摘要： 我们展示了通过盖亚引力透镜计划确认的九个引力透镜化准星的XMM-Newton X射线观测结果，这些准星在$1 \lesssim z \lesssim 3$被识别。八个系统被强检测到，0.3–8.0 keV的流量为$F_{0.3-8.0} \gtrsim 5 \times 10^{-14}\ {\rm erg}\ {\rm cm}^{-2}\ {\rm s}^{-1}$。用吸收幂律模型拟合X射线光谱，我们推导出八颗被探测到的准星的幂律光子指数和2–10 keV的光度。除了呈现样本属性以供更大的准星群体研究以及规划未来的焦散交叉事件外，我们还确定了三个感兴趣的准星：一个从之前的ROSAT观测中显示出流量变化证据的准星，由XMM-Newton解析的最接近分离的单个引力透镜源，以及在$z>3$已知的最亮X射线准星之一。这些源代表了 SRG/eROSITA 将推动的发现尖端。 显示英文摘要

摘要： We present XMM-Newton X-ray observations of nine confirmed lensed quasars at $1 \lesssim z \lesssim 3$ identified by the Gaia Gravitational Lens program. Eight systems are strongly detected, with 0.3--8.0 keV fluxes $F_{0.3-8.0} \gtrsim 5 \times 10^{-14}\ {\rm erg}\ {\rm cm}^{-2}\ {\rm s}^{-1}$. Modeling the X-ray spectra with an absorbed power law, we derive power law photon indices and 2--10 keV luminosities for the eight detected quasars. In addition to presenting sample properties for larger quasar population studies and for use in planning for future caustic crossing events, we also identify three quasars of interest: a quasar that shows evidence of flux variability from previous ROSAT observations, the most closely-separated individual lensed sources resolved by XMM-Newton, and one of the X-ray brightest quasars known at $z>3$. These sources represent the tip of discovery that will be enabled by SRG/eROSITA.