Parkes observations for project P1050 semester 2023OCTS_10

This is a request for the observation time for the timing campaign of new pulsars discovered in the reprocessing of the low-latitude Galactic plane section of the HTRU-S survey (HTRU-S LowLat) and the Parkes Multibeam Pulsar Survey (PMPS). We have completed 90 % of the HTRU-S LowLat survey and completed zero acceleration PMPS search with GPU-based coherent acceleration search, template bank, and fast folding algorithm pipelines and now have discovered 112 previously unknown pulsars among which 18 were found in the PMPS. Interesting science can usually only be derived from a new pulsar after confirmation, and a follow-up timing campaign is carried out. At least 1-2 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, and spin-down rate, as well as for detecting any unexpected behaviour of the pulsar which might result from emission instabilities. This project is necessary for the timing of several interesting pulsars, including binary pulsars, high DM pulsars, scattered profile pulsars, and bright ones that show emissions in larger bandwidths in the UWL band. Apart from this, finding the nature of a unique binary pulsar system via a dedicated observing campaign is also another goal. The follow-up timing in semester 2023OCTS will assist in completing many exciting large-term science goals.

本申请旨在为两项巡天项目中发现的新脉冲星的计时观测申请观测时长：一是HTRU-S巡天（HTRU-S LowLat）的低银纬银道面区域再处理数据集，二是帕克斯多波束脉冲星巡天（PMPS）。我们已完成90%的HTRU-S LowLat巡天任务，并通过基于GPU的相干加速搜索、模板库及快速折叠算法流程完成了零加速PMPS搜索，目前已发现112颗此前未被记录的脉冲星，其中18颗来自PMPS。新脉冲星通常需经确认并开展后续计时观测后，才能产出具有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小时长为至少1-2年的初始计时观测，这对获取脉冲星的特征年龄、磁场强度、自转减速率等参数，以及检测由发射不稳定性引发的脉冲星异常行为至关重要。本项目需对多类极具科学价值的脉冲星开展计时观测，包括双星脉冲星、高色散量（DM）脉冲星、轮廓展宽脉冲星，以及在UWL波段拥有更大带宽发射的亮脉冲星。此外，通过专属观测计划解析独特双星脉冲星系统的本质，亦是本项目的另一目标。2023OCTS学期的后续计时观测，将助力实现多项重大长期科学目标。