Parkes observations for project P1050 semester 2021APRS_14

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 80 % of the survey with GPU based coherent acceleration search, template bank and fast folding algorithm pipelines, and now have discovered 68 previously unknown pulsars and 21 "class A" pulsars awaiting confirmation. 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 the new double neutron star (DNS) system J1325-6253 discovered last semester and for following up our confirmed/to-be confirmed new pulsars from the HTRU Galactic plane survey. Pulsars on the observing list here have been confirmed and remaining candidates will be confirmed in the current 2020OCTS semester, the follow-up timing in 2021APRS will produce completely new and exciting results. In addition, this timing project will allow us to measure the advance of periastron of PSR J1325-6253, true Galactic plane pulsar population and boundaries of pulsar parameter space in the galactic plane.

本申请为针对HTRU巡天（HTRU Survey，项目编号P630）低银道面区域再处理工作中新发现脉冲星开展计时观测的时长申请。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程完成该巡天80%的工作，共发现68颗此前未被记录的脉冲星，以及21颗待确认的“A类”脉冲星。通常而言，新发现的脉冲星仅在完成确认并开展后续计时观测后，方能产出具有科学价值的研究成果。对新发现脉冲星开展为期一年的初始计时观测，是完成其完整特性表征的最低时长要求，这对于推导脉冲星特征年龄、磁场强度、自转减速率等核心参数，以及探测可能由辐射不稳定性引发的脉冲星异常行为至关重要。本计时项目不仅可用于对上学期发现的双中子星（DNS）系统J1325-6253开展计时观测，还可用于跟进我们在HTRU银道面巡天中已确认及待确认的新脉冲星样本。本次观测列表中的脉冲星均已完成确认，剩余候选体将在2020OCTS学期内完成确认；2021APRS学期开展的后续计时观测将产出全新且极具突破性的科研成果。此外，本计时项目还可用于测量脉冲星J1325-6253的近星点进动，以及真实银道面脉冲星种群分布与银道面内脉冲星参数空间的边界范围。