Parkes observations for project P1345 semester 2024OCTS_11

This proposal aims to obtain timing solutions and constrain burst rates and spin down properties of a sample of new rotating radio transients (RRATs) discovered with the ASKAP CRAFT Coherent upgrade (CRACO) system. \n In the last 6-months of commissioning, CRACO discovered and localised 10 new RRATs, identified by their sporadic pulses with dispersion measures (DM) consistent with Galactic objects. \n \n We request 15h of Parkes time split into three 30min observations spanning 6-months for each target. \n This will allow us to constrain phase-coherent timing solutions given that we already have arcsec-precision interferometric localisations. \n Our main science goals are: \n 1) to measure their burst rates, periods, and spin-down properties; \n 2) to assess their nulling fraction and emission mechanism\n 3) to determine if the CRACO RRATs are different to the known RRATs population.

本提案旨在获取利用ASKAP CRAFT相干升级（CRACO）系统发现的一批新型旋转射电暂现源（rotating radio transients, RRATs）样本的定时解，并约束其爆发率与自转减速特性。
在为期6个月的调试阶段中，CRACO系统已发现并定位了10颗新型RRATs，这些源凭借其间歇性脉冲信号及与银河天体相符的色散量（dispersion measures, DM）得以识别。
我们申请为每个目标分配总计15小时的帕克斯望远镜观测时间，该时间将拆分为三次、每次30分钟的观测任务，且观测周期跨度为6个月。
鉴于我们已获取角秒级精度的干涉定位结果，本次观测将可用于约束相位相干定时解。
我们的核心科学目标如下：
1. 测定这些RRATs的爆发率、自转周期及自转减速特性；
2. 评估其消隐占比与辐射机制；
3. 探究CRACO发现的RRATs与已知RRATs族群是否存在差异。