Parkes observations for project P1165 semester 2025OCTS_02

We recently discovered two new pulsars J1849+1001 (35.1 ms) and J1839+0543 (57.9 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 and J1839+0543 can be classified as the 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 or MeerKAT to measure "Post-Keplerian" parameters and then measure both neutron star and companion masses.我们近期在银河系中等银纬区域的FAST（Five-hundred-meter Aperture Spherical radio Telescope，500米口径球面射电望远镜）脉冲星巡天项目（编号PT2020_0141）中，发现了两颗新脉冲星J1849+1001（自转周期35.1毫秒）与J1839+0543（自转周期57.9毫秒）。后续脉冲星计时观测表明，这两颗脉冲星均处于拥有大质量伴星的圆轨道中。这意味着PSRs J1849+1001与J1839+0543可被归类为中等质量双星脉冲星（intermediate-mass binary pulsar，简称IMBP）。其大质量伴星也使得这两颗脉冲星成为通过脉冲星计时测量后开普勒参数（Post-Keplerian）的理想系统。本次帕克斯（Parkes）观测数据将与FAST或MeerKAT的常规计时观测数据相结合，用于测量后开普勒参数，进而同时测定中子星与伴星的质量。