Parkes observations for project P1345 semester 2024OCTS_09

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.

本提案旨在获取相位相干定时解，并约束利用ASKAP CRAFT相干升级（ASKAP CRAFT Coherent Upgrade, CRACO）系统发现的一批新旋转射电暂现源（rotating radio transients, RRATs）的爆发率与自转减慢特性。
在该系统调试的最后六个月中，CRACO发现并定位了10颗新的旋转射电暂现源，这些源以间歇性脉冲为特征，且其色散量（dispersion measures, DM）与银河天体相符。

我们申请为每个目标源分配总时长15小时的帕克斯（Parkes）望远镜观测时间，该时间将被拆分为三次各30分钟的观测，且三次观测的时间跨度为6个月。
鉴于我们已获得角秒级精度的干涉定位结果，此举将帮助我们约束相位相干定时解。
我们的核心科学目标如下：
1) 测定其爆发率、自转周期以及自转减慢特性；
2) 评估其脉冲消零比例与辐射机制；
3) 探究CRACO系统发现的旋转射电暂现源是否有别于已知的旋转射电暂现源种群。