Parkes observations for project P1345 semester 2024OCTS_12

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.本提案旨在获取通过ASKAP的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）的计时解，并约束其爆发率与自转减慢特性。 在调试阶段的最后六个月内，CRACO系统共发现并定位了10颗新型RRATs，这些源的离散脉冲特征与色散量（DM）均与银河天体的特征相符。 我们申请使用帕克斯（Parkes）望远镜总时长15小时的观测时间，将其拆分为每颗目标分6个月开展的3次、每次30分钟的观测。 鉴于我们已获取角秒级精度的干涉定位结果，此举将助力我们获得相位相干的计时解。 我们的核心科学目标如下： 1） 测量其爆发率、自转周期与自转减慢特性； 2） 评估其消隐比例与辐射机制； 3） 探究CRACO发现的RRATs与已知RRATs群体是否存在差异。