Crab脉冲星X射线计时观测数据处理与分析  

Process and Analysis of X-ray Timing Data for Crab Pulsar

作　　者：杨廷高[1,2] 童明雷[1,2] 赵成仕[1,2] 高玉平[1,2] YANG Ting-gao1,2 TONG Ming-lei1,2 ZHAO Cheng-shi1,2 GAO Yu-ping1,2(1 National Time Service Center, Chinese Academy of Sciences, Xi＇an 710600） （2 Key Laboratory of Time and Frequency Primary Standards, National Time Service Center, Chinese Academy of Sciences, Xi＇an 710600)

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院时间频率基准重点实验室,西安710600

出　　处：《天文学报》2018年第2期8-14,共7页Acta Astronomica Sinica

基　　金：国家自然科学基金项目(U1531112,11103024,11373028,11403030);中国科学院“西部之光”青年学者项目(XAB2015A06);中国科学院青年创新促进会项目(2017450);陕西省青年科技新星项目(2015KJXX-56)资助

摘　　要：对我国公开发布的空间试验卫星X射线探测器观测Crab脉冲星的数据进行了处理与分析,描述了利用X射线脉冲星观测数据与卫星轨道数据建立积分脉冲轮廓与标准脉冲轮廓的方法,给出了在频域测量脉冲星脉冲到达时刻(toa)的原理方法与算法.利用每组观测数据,计算得到Crab脉冲星脉冲toa,通过与Crab脉冲星星历预报脉冲toa的比较,分析得到卫星载荷X射线探测器观测Crab脉冲星,在消除掉系统误差后,50 min积分时间的观测精度约14μs.The X-ray timing data for the Crab pulsar obtained by the Chinese X- ray pulsar navigation test satellite are processed and analyzed. A creation method for integration and standard X-ray pulse profiles for the Crab pulsar is described by using the X-ray timing data of the satellite and the Crab pulsar ephemeris from the radio timing observations. The principle and algorithm for determining the pulsar pulse time of arrival （toa） in the frequency domain are briefly introduced. The pulsar pulse time of arrival is calculated by using the timing data of 50 min integration for each group observations. By the comparison between the observed Crab pulsar pulse time of arrival at the solar system barycenter and that predicted with the Crab pulsar ephemeris, we found that the accuracy of timing residuals is about 14 μs after the systematic trend is removed by a quadratic polynomial.

关 键 词：天体测量学 脉冲星 CRAB 方法 数据分析 

分 类 号：P129[天文地球—天体测量]