Parkes observations for project P1149 semester 2022OCTS_04

We propose continued Parkes follow-up observations of a new pulsar discovered from the ongoing SMART pulsar survey with the MWA. Initial analysis from Parkes and GMRT follow-ups suggests that the pulsar likely belongs to the rare class of low-luminosity, steep-spectrum pulsars. This class of pulsars make up ~2% of the currently-known population of long-period pulsars, and as such understanding their emission and spectral properties is vital for developing a more comprehensive picture of the Galactic population of pulsars, and also to make meaningful forecast for the detectable population of pulsars in future low-frequency surveys, including those planned with SKA-Low. The proposed observations, along with an interferometric position that we hope to obtain from GMRT imaging will allow us to obtain a timing solution on a faster time frame, thereby allowing us to determine the pulsar's spin and astrometric parameters. The observations will also yield more reliable estimates of pulsar flux density measurements, allowing us to determine the pulsar's spectral and luminosity properties.

我们提议对依托默奇森宽场阵列（Murchison Widefield Array, MWA）开展的正在进行的SMART脉冲星巡天项目中发现的一颗新脉冲星，开展帕克斯望远镜（Parkes）后续持续观测。帕克斯望远镜与巨米波射电望远镜（Giant Metrewave Radio Telescope, GMRT）的后续观测初步分析结果显示，该脉冲星大概率隶属于低光度、陡谱脉冲星这一稀有类别。这类脉冲星仅占当前已知长周期脉冲星种群的约2%，因此，厘清它们的辐射与谱学特性，对于构建更全面的银河系脉冲星种群图景，以及为未来低频射电巡天项目（包括平方公里阵列低频望远镜（Square Kilometre Array-Low, SKA-Low）规划的巡天项目）中可探测脉冲星种群做出有意义的预测，均至关重要。本次提议的观测，配合我们计划通过巨米波射电望远镜成像获取的干涉测量位置，将帮助我们在更短的时间尺度内获得该脉冲星的计时解，进而确定其自转参数与天体测量参数。此外，本次观测还将得到更为可靠的脉冲星流量密度测量估值，助力我们明确该脉冲星的谱学与光度特性。