Parkes observations for project P1050 semester 2022APRS_02

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项目低银纬银道面区域的再处理工作中发现的新脉冲星，申请开展计时观测计划所需的观测时长。目前我们已基于GPU加速的相干加速搜索、模板库及快速折叠算法流水线完成了该巡天90%的观测任务，并已发现107颗此前未被记录的脉冲星。通常而言，新发现的脉冲星仅在完成证认并开展后续计时观测计划后，才能产出具有科学价值的研究成果。对任意新发现的脉冲星而言，至少需要为期一年的初始计时观测，才能完整刻画其物理特性——这也是获取脉冲星特征年龄、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的必要前提。本计时观测项目将用于对本学期及上一学期发现的毫秒脉冲星开展计时观测，并跟进我们在HTRU银道面巡天中证认的全部脉冲星。在APRS22项目中开展的后续计时观测将产出全新且极具突破性的科学成果。此外，本计时观测项目还将帮助我们准确测定银道面内脉冲星的真实种群分布，以及银道面区域内脉冲星参数空间的边界。