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.

本申请旨在申请观测时长，用于开展针对HTRU巡天（P630）低银纬银道面区段再处理工作中发现的新脉冲星的计时观测计划。目前我们已基于图形处理器（Graphics Processing Unit，GPU）的相干加速搜索（coherent acceleration search）、模板库（template bank）及快速折叠算法（fast folding algorithm）处理流水线，完成了该巡天计划90%的工作量，累计发现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完成观测确认并启动后续计时观测计划后，方可产出具有科学意义的研究成果。对任意新发现脉冲星开展至少一年的初始计时观测，是完整表征其物理特性的最低时长要求，这对于推导脉冲星特征年龄、磁场强度、自转减速速率等关键参数，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。本次计时观测计划，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HTRU银道面巡天中已确认的脉冲星。APRS22项目中的后续计时观测将产出全新且振奋人心的突破性成果。此外，本次计时观测计划将助力我们精准测定银道面内脉冲星的真实种群分布，以及银道面范围内脉冲星参数空间的边界范围。