Parkes observations for project P1214 semester 2023OCTS_03

Rotating Radio Transients (RRATs) are neutron stars that emit sporadic radio bursts. Our observations of RRAT~J1913+1330 using the FAST telescope have revealed intriguing characteristics that align with populations of nulling pulsars, giant pulses, and Fast Radio Bursts (FRBs) from various perspectives. However, the limitations in tracking length, effective time resolution, and narrowband capabilities of the FAST observation have left many mysteries surrounding this source unanswered. In this proposal, we aim to conduct observations of J1913+1330 using the Parkes Ultra-Wideband Low (UWL) receiver. Our objective is to perform a single tracking session lasting up to 5 hours, employing high-time resolution, in order to search for a long-term period and sub-millisecond quasi-periodic oscillation. Through an analysis of the spectrum and potential scattering effects using wideband observation, the UWL data will provide valuable insights to determine whether this source exhibits properties more akin to pulsars or FRBs.

旋转射电暂现源（Rotating Radio Transients, RRATs）是一类会释放间歇性射电爆发的中子星。我们利用500米口径球面射电望远镜（Five-hundred-meter Aperture Spherical Telescope, FAST）对RRAT J1913+1330的观测，从多个维度揭示了其与消零脉冲星、巨脉冲以及快速射电暴（Fast Radio Bursts, FRBs）群体相契合的有趣特征。然而，本次FAST观测在跟踪时长、有效时间分辨率以及窄带观测能力方面存在局限，使得该源仍留存诸多未解之谜。在本研究提案中，我们计划利用帕克斯（Parkes）望远镜的超宽带低频段（Ultra-Wideband Low, UWL）接收机对J1913+1330开展观测。本次观测的核心目标是开展单次最长5小时的高时间分辨率跟踪任务，以搜寻该源的长周期信号与亚毫秒级准周期振荡。通过对宽带观测获取的光谱数据与潜在散射效应进行分析，UWL观测数据将为判断该源的特性更趋近于脉冲星还是快速射电暴提供极具价值的参考依据。