标题： 一个新的用于探测Cyg X-1中X射线脉冲的算法 显示英文标题

标题： A new algorithm for detecting X-ray shots in Cyg X-1

摘要： Cyg X-1 的短期 X 射线变化可以被解释为称为“shot”的小型耀发的随机出现，但其物理本质仍然不清楚。 我们提出了一种基于基线检测和模板拟合的新算法来识别 X 射线光变曲线中的 shot。 与之前的技术相比，我们的算法能够检测到幅度更低、时间间隔更短的 shot。 通过 NICER 观测，我们发现，在考虑探测灵敏度修正后，shot 的幅度和复发率都与平均计数率呈正相关，而复发率对计数率的依赖性要高得多。 这表明更高的质量吸积率会驱动更多的且略大的 shot。 我们还发现，先前研究中在 shot 峰值附近发现的突然硬化现象归因于不同能量带中的 shot 特征不同；无需引入快速的物理过程来突然硬化发射谱。 显示英文摘要

摘要： The short-term X-ray variability of Cyg X-1 can be interpreted as random occurrence of mini-flares known as the shots, whose physical nature is still unclear. We propose a new algorithm for shot identification in the X-ray light curve, based on baseline detection and template fitting. Compared with previous techniques, our algorithm allows us to detect shots with lower amplitudes and shorter time separations. With NICER observations, we find that, after correction for detection sensitivity, both the shot amplitude and recurrence rate are positively scaled with the mean count rate, while the recurrence rate has a much higher dependence on the count rate. These suggest that a higher mass accretion rate will drive more and slightly larger shots. We also find that the abrupt hardening near the shot peak found in previous studies is attributed to different shot profiles in different energy bands; there is no need to involve a rapid physical process to suddenly harden the emitting spectrum.