Parkes observations for project P1038 semester 2020APRS_16

PSR~J1759-2402 is one of a small handful of pulsars which are in orbit about high mass stars. Its orbital period is 8.2 years and the orbit is highly eccentric with periastron expected in 2021 January. Although discovered at Parkes, the Lovell telescope has been monitoring the pulsar over many years. However, it's restricted bandwidth and lack of 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 weekly observations of the pulsar to track its progress around the orbit.

脉冲星PSR J1759-2402是少数围绕大质量恒星运行的脉冲星之一。其轨道周期为8.2年，轨道偏心率极高，预计近星点将在2021年1月抵达。尽管该脉冲星最初于帕克斯望远镜（Parkes）下被发现，但洛弗尔望远镜（Lovell telescope）已对其开展了多年的监测工作。然而，洛弗尔望远镜带宽受限且不具备偏振观测能力，无法追踪该脉冲星穿过伴星掩食区域的全过程。与之形成鲜明对比的是，帕克斯望远镜搭载的UWL设备拥有超宽带宽与优异的偏振观测性能，可让我们在该脉冲星穿过伴星星风时，精准测定其散射、偏振、色散量（dispersion measure）与旋转量（rotation measure）的变化情况。我们申请对该脉冲星开展每周一次的观测，以追踪其沿轨道运行的完整进程。