Parkes observations for project P1165 semester 2023OCTS_06

We recently discovered a new pulsar J1849+1001 (35.1 ms) in a FAST pulsar survey at intermediate Galactic latitudes (PT2020_0141). Follow-up timing observations show that they are in circular orbits with massive companions. This suggests that PSR J1849+1001 can be classified as an intermediate-mass binary pulsar (IMBP). Their massive companions also make them promising systems to measure "Post-Keplerian" parameters through pulsar timing. These Parkes observations will be combined with regular timing observations with FAST to measure "Post-Keplerian" parameters and then measure both neutron star and companion masses.我们近期在银道面中等纬度区域开展的500米口径球面射电望远镜（FAST）脉冲星巡天（项目编号PT2020_0141）中发现了一颗新脉冲星J1849+1001（脉冲周期35.1毫秒）。后续计时观测结果显示，该脉冲星与大质量伴星处于圆轨道之中，这一特性表明PSR J1849+1001可被归类为中等质量双星脉冲星（intermediate-mass binary pulsar，IMBP）。其大质量伴星也使得该系统成为通过脉冲星计时测量后开普勒参数（Post-Keplerian parameters）的优质候选对象。本次帕克斯（Parkes）观测数据将与FAST的常规计时观测数据相结合，用于测定后开普勒参数，进而同时测定中子星与伴星的质量。