Parkes observations for project P1050 semester 2022APRS_12

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（P630）低银纬银道面区域的再处理工作所发现的新脉冲星，开展计时观测项目申请观测时长。目前我们已基于图形处理器（GPU）的相干加速搜索、模板库及快速折叠算法流水线，完成了该巡天项目90%的观测处理流程，共发现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观测确认并开展后续计时观测项目后，方能产出具备科学价值的研究成果。对任意新发现脉冲星进行完整特性表征的最短时长为初始计时观测一年，这一过程是获取脉冲星特征年龄、磁场强度、自转减速率等参数，以及探测可能由辐射不稳定性引发的脉冲星异常行为的必要前提。本计时观测项目需针对本学期及上一学期发现的毫秒脉冲星开展计时，并跟进HTRU银道面巡天中已确认的脉冲星。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，本计时观测项目将帮助我们精准测算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。