Parkes observations for project P1038 semester 2020OCTS_21

PSR~J1759-2402 is one of a small handful of pulsars which are in orbit about high mass stars. Its orbital period is 8.3 years and the orbit is highly eccentric with periastron expected in 2021 March. Although discovered at Parkes, the Lovell telescope has been monitoring the pulsar over many years. However, it’s restricted bandwidth, maintenance schedule and poorer polarization capability make it unsuitable to follow the pulsar as it enters and leaves the eclipse by the companion. In contrast, the UWL on Parkes with its wide- band and excellent polarization characteristics means that we can determine scattering, polarization, dispersion measure and rotation measure changes as the pulsar enters its companion wind. We request a continuation of our weekly observations of the pulsar to track its progress around the orbit.PSR J1759-2402是为数不多的几颗环绕大质量恒星运行的脉冲星（pulsar）之一。其轨道周期为8.3年，轨道具有极高偏心率，预计近星点（periastron）将在2021年3月到来。尽管该脉冲星是在帕克斯望远镜（Parkes）下被发现的，但洛弗尔望远镜（Lovell telescope）已对其开展了多年监测。然而，该望远镜带宽受限、维护日程固定，且偏振观测能力较弱，无法胜任该脉冲星穿过伴星掩食区域前后的追踪观测。与之相比，帕克斯望远镜搭载的超宽频带系统（UWL）拥有宽频带与优异的偏振特性，可用于测定脉冲星进入伴星星风时的散射、偏振、色散量（dispersion measure）与旋转量（rotation measure）的变化情况。我们申请延续对该脉冲星的每周观测计划，以追踪其在轨道上的完整运行进程。