Parkes observations for project P1050 semester 2022APRS_02

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.

本申请旨在为针对HTRU巡天（HTRU Survey）低银道面区域（项目编号P630）再处理工作中发现的新脉冲星开展的计时观测项目，申请观测时长。我们已借助基于图形处理器（Graphics Processing Unit，GPU）的相干加速搜索、模板库与快速折叠算法流程，完成该巡天90%的观测工作，并已发现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身份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。对新发现的脉冲星开展为期一年的初始计时观测，是全面表征其物理特性的最低时间要求；这一工作对于推导脉冲星的特征年龄、磁场强度、自转减慢速率等参数，以及探测可能由辐射不稳定性引发的脉冲星异常行为均至关重要。本次计时观测项目，既可用于对当前及上一半年度观测周期内发现的毫秒脉冲星开展计时观测，也可用于跟进我们在HTRU银道面巡天中确认的脉冲星。在APRS22项目中开展的后续计时观测，将产出全新且极具科学意义的研究成果。此外，本计时项目还将助力我们精准测算真实的银道面脉冲星族群规模，明确银道面内脉冲星参数空间的边界范围。