Parkes observations for project P1080 semester 2021APRS_04

We propose continued timing observations of a new pulsar discovered with the MWA. Thanks to the interferometric advantages of the MWA and our recent GMRT follow-up, we have been able to determine the pulsar's position to ~5 arcseconds precision, which may help a faster convergence to its timing solution. This will help determine the pulsar's spin and astrometric parameters. The analysis of Parkes and GMRT data suggests that the pulsar is likely a steep-spectrum, low-luminosity object. Observations with the ultra-wide band low-frequency receiver will help further reinforce this, besides allowing us to explore the frequency dependence of its polarisation and a large variability that is seen at multiple frequency bands. Most importantly, these observations will ensure continued timing of the pulsar through the next semester when the MWA is unlikely to be available for regular observations.

我们提议对使用默奇森宽场阵列（Murchison Widefield Array, MWA）发现的一颗新脉冲星开展持续计时观测。得益于MWA的干涉测量优势以及我们近期开展的戈德西巨型米波射电望远镜（Giant Metrewave Radio Telescope, GMRT）后续观测，我们已将该脉冲星的位置精度确定至约5角秒，这将有助于更快收敛至其计时解，进而确定该脉冲星的自转参数与天体测量参数。对帕克斯（Parkes）望远镜与GMRT观测数据的分析表明，该脉冲星大概率是一个谱指数较陡、光度较低的天体。使用超宽频低频接收机开展的观测将进一步验证这一结论，同时还能让我们探究其偏振特性的频率依赖性，以及在多个频段中观测到的显著变异性。最为关键的是，在MWA无法开展常规观测的下一学期，这些观测将确保该脉冲星的计时观测得以持续进行。