论文标题
使用同时进行Astrosat-Nicer观察，探测Cygnus X-1中的射击行为
Probing the shot behaviour in Cygnus X-1 using simultaneous AstroSat-NICER observation
论文作者
论文摘要
我们使用astrosat和更好的同时观察到6.39 ks同时观察到，在0.1-80 keV能带中观察到CYG X-1中观察到的Aperiodic耀斑特征（也称为镜头）。我们分别在柔软和硬X射线带中分别以更好和Astrosat-Laxpc的形式检测49张照片。我们在软X射线（0.1-3 KEV）中首次观察射击配置文件，该光谱峰值为$ \ sim $ 2 kev。使用时间平均的光谱法，我们测量了内积盘的截断为$ 6.7 \ pm0.2 $引力半径。射相分辨的光谱法使我们能够识别软X射线中一些最亮的上周期峰的起源。我们发现积聚率与在射击过程中的常数一致，而随着这些镜头的上升/衰减，积聚磁盘的内边缘向内移动/向外移动。我们讨论导致内部半径摇摆的可能机制。
We analyse the aperiodic flaring features, also known as shots, observed in Cyg X-1 in the 0.1-80 keV energy band using a 6.39 ks simultaneous observation with AstroSat and NICER. We detect 49 simultaneous shots in the soft and hard X-ray bands with NICER and AstroSat-LAXPC, respectively. We observe the shot profile for the first time in soft X-rays (0.1-3 keV), which shows a spectral peak at $\sim$2 keV. Using time-averaged spectroscopy, we measured the truncation of the inner accretion disk at $6.7\pm0.2$ gravitational radii. The shot-phase resolved spectroscopy allowed us to identify the origin of some of the brightest aperiodic peaks in the soft X-rays. We find that the accretion rate is consistent with a constant during the shots while the inner edge of the accretion disk moves inwards/outwards as these shots rise/decay. We discuss the possible mechanisms causing the swing in the inner radius.
