Parkes observations for project P1050 semester 2022APRS_19

This is a request for observing time for the timing campaign of new pulsar discoveries from the reprocessing of the low-latitude Galactic plane section of the HTRU survey (P630). We have now completed 90 % of the survey with GPU based coherent acceleration search, template bank and fast folding algorithm pipelines, and now have discovered 107 previously unknown pulsars. Interesting science can usually only be derived from a new pulsar after confirmation and a follow-up timing campaign is carried out. One year of initial timing is the minimum timespan required to fully characterise any newly-discovered pulsars, essential for deriving pulsar parameters such as the characteristic age, magnetic field strength, spin-down rate, as well as to detect any unexpected behaviour of the pulsar which might result from emission instabilities. This timing project is necessary for the timing of millisecond pulsars discovered in the current and last semester and for following up our confirmed pulsars from the HTRU Galactic plane survey. The follow-up timing in APRS22 will produce completely new and exciting results. In addition, this timing project will allow us to measure the true Galactic plane pulsar population and the boundaries of pulsar parameter space in the galactic plane.本申请旨在为HTRU巡天（High Time Resolution Universe Survey，P630）银道面低纬度区块再处理过程中发现的新脉冲星，申请计时观测所需的观测时长。目前我们已基于GPU加速的相干加速搜索（coherent acceleration search）、模板库（template bank）及快速折叠算法（fast folding algorithm）流程完成了该巡天项目90%的工作，并已发现107颗此前未被发现的脉冲星。通常而言，新发现脉冲星仅在完成认证并开展后续计时观测项目后，方能产出具有科学价值的研究成果。为全面表征任意一颗新发现脉冲星，至少需要开展为期一年的初始计时观测——这对推导脉冲星特征年龄、磁场强度、自转减速率等关键参数，以及探测由射电辐射不稳定性引发的脉冲星异常行为至关重要。本次计时项目可用于对本观测学期及上一观测学期发现的毫秒脉冲星（millisecond pulsar）开展计时观测，并对HTRU银道面巡天中已认证的脉冲星进行后续跟踪。在APRS22中开展的后续计时观测将产出全新且极具突破性的研究成果。此外，本次计时项目将帮助我们精准测定银道面内脉冲星的真实种群分布，以及脉冲星参数空间在银道面内的边界范围。