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.

我们近期在银道面中等纬度的FAST脉冲星巡天项目（PT2020_0141）中发现了两颗新脉冲星J1849+1001（自转周期35.1 ms）与J1839+0543（自转周期57.9 ms）。后续计时观测结果显示，这两颗脉冲星均处于拥有大质量伴星的圆轨道之上，因此可将其归类为中间质量双脉冲星（intermediate-mass binary pulsar，IMBP）。其大质量伴星使得它们成为通过脉冲星计时测量后开普勒（Post-Keplerian）参数的极具潜力的候选系统。本次帕克斯（Parkes）观测数据将与FAST或MeerKAT的常规计时观测相结合，以测量后开普勒参数，进而同时推算中子星与伴星的质量。