脉冲星导航试验卫星时间数据分析与脉冲轮廓恢复

摘要

XPNAV-1 is the first satellite of China designed for the on-orbit demonstration of the X-ray pulsar navigation technology. The X-ray timing data analysis method was discussed, and the pulse profile using the observation data was recovered to verify the capability of observing pulsars in space. The scientific mission overview of XPNAV-1 was described. The photon timing data processing steps were designed,and the X-ray timing delay model was constructed. Based on the proposed model, the observed photon arrival times of the Crab pulsar were corrected to the inertial reference point, and then the pulse profile was recovered through the epoch folding technology. The recovered profile shows that the two-peak structure stands for the Crab′s radiation shape,proving that Crab is successfully observed by the X-ray detector of China.%脉冲星导航试验卫星(X-ray Pulsar-based Navigation-1, XPNAV-1)是中国致力于脉冲星导航空间试验验证的首颗试验卫星,旨在研究X射线光子时间数据处理分析方法,通过实测数据恢复脉冲轮廓,以验证使用国产X射线探测器观测脉冲星的能力.文章对XPNAV-1卫星科学试验任务作了介绍,给出了光子时间数据处理的步骤,建立了脉冲星X射线大尺度延时模型;针对XPNAV-1卫星实测蟹状星云(Crab)脉冲星数据,借助大尺度延时模型将光子到达时间改正到了惯性参考点,使用历元折叠方法获得了Crab脉冲星脉冲轮廓曲线,其特征的双峰结构表明国产探测器成功实测了Crab脉冲星观测.