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.

PSR J1759-2402是少数几颗环绕大质量恒星运行的脉冲星（pulsar）之一。其轨道周期为8.2年，轨道偏心率极高，预计近星点（periastron）将于2021年1月到达。该脉冲星虽由帕克斯望远镜（Parkes）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，使其无法追踪该脉冲星穿过伴星遮挡的全过程。与之形成鲜明对比的是，帕克斯望远镜搭载的UWL设备凭借宽频带与优异的偏振特性，使我们得以测量脉冲星穿过伴星星风时的散射、偏振、色散量（dispersion measure）与旋转量（rotation measure）变化。我们申请对该脉冲星进行每周一次的观测，以完整追踪其在轨道上的运行进程。