Parkes observations for project P1038 semester 2020APRS_12

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之一。其轨道周期为8.2年，轨道偏心率极高，近星点预计将于2021年1月抵达。尽管该脉冲星是在帕克斯射电望远镜（Parkes）下发现的，但洛弗尔望远镜（Lovell Telescope）已对其开展了多年监测。然而，洛弗尔望远镜带宽受限且不具备偏振测量能力，无法追踪脉冲星进入和离开伴星造成的食相的过程。相比之下，帕克斯射电望远镜搭载的UWL系统拥有超宽频带与优异的偏振测量特性，可让我们测定脉冲星进入伴星星风时的散射、偏振、色散量（dispersion measure, DM）与转动量（rotation measure, RM）的变化。我们申请对该脉冲星进行每周一次的观测，以追踪其沿轨道运行的全过程。