Science News：

　　报告人：戴志军

　　Journal Club Public Talk：

　　报告人：牛书

　　报告题目：The Soft State Of Cygnus X-1 Observed With Nustar

　　报告摘要：Cygnus X-1 is the most-known and widely studied black hole source. On this talk, I will present the latest observation data about a multi-epoch hard X-ray analysis of Cygnus X-1 in its soft state based on four observations with the Nuclear Spectroscopic Telescope Array. The result confirms the previous work about the black hole spin, the iron abundance, the misalignment between the inner disk. Furthermore, the author finds the absorption from ionized iron in the focused stellar wind from the supergiant companion star.

　　参考文献：Walton D. J., Tomsick J. A., Madsen K. K., et al., 2016, ApJ, 826, 87

　　时间：2016年11月15日 12:15 － 1:45pm

　　地点: 紫台619会议室