标题： XEUS上的快速X射线时标能力 显示英文标题

标题： A fast X-ray timing capability on XEUS

摘要： 快速X射线时延可以用来探测塌缩天体周围的强引力场，并限制中子星的高密物质状态方程。 这些研究需要非常高的光子统计精度。 鉴于其镜面的巨大收集面积，XEUS可以在这一领域作出独特的贡献。 为此，我们建议在XEUS镜面的焦平面上加入快速X射线时延能力。 我们简要概述了这种能力的科学动机。 我们计算了一些灵敏度估计值，表明XEUS相对于Rossi X射线时延探测器（RXTE）能够提供一个数量级以上的灵敏度提升。 最后，我们提出了一种可能的探测器实现方式，即一组小型硅漂移探测器，它们可以在焦点外操作。 显示英文摘要

摘要： Fast X-ray timing can be used to probe strong gravity fields around collapsed objects and constrain the equation of state of dense matter in neutron stars. These studies require extremely good photon statistics. In view of the huge collecting area of its mirrors, XEUS could make a unique contribution to this field. For this reason, we propose to include a fast X-ray timing capability in the focal plane of the XEUS mirrors. We briefly outline the scientific motivation for such a capability. We compute some sensitivity estimates, which indicate that XEUS could provide better than an order of magnitude sensitivity improvement over the Rossi X-ray Timing Explorer. Finally, we present a possible detector implementation, which could be an array of small size silicon drift detectors operated out of focus.