Parkes observations for project P1050 semester 2022APRS_20

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.

本申请旨在申请观测时长，用于开展针对HTRU巡天（P630）银道面低纬度区域再处理项目中发现的新脉冲星的计时观测工作。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程，完成了该巡天项目90%的处理工作，共发现107颗此前未被发现的脉冲星。通常而言，新发现的脉冲星仅在经过确认并开展后续计时观测项目后，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开展为期一年的初始计时观测，是完成其全面参数表征的最低时长要求——这一环节对于获取脉冲星特征年龄、磁场强度、自转减慢率等关键参数，以及探测可能由辐射不稳定性引发的脉冲星异常行为均至关重要。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（millisecond pulsars）开展计时观测，并对HTRU银道面巡天中已确认的脉冲星进行后续跟进观测。在APRS22中开展的后续计时观测将产出全新且极具吸引力的科研成果。此外，本计时观测项目将帮助我们精准测定银道面内真实的脉冲星种群分布，以及脉冲星参数空间在银道面内的边界范围。