Parkes observations for project P1101 semester 2023OCTS_07

We propose to continue our fortnightly monitoring of a very active repeater, FRB~190520, with the Parkes UWL system. Our current observations show that FRB~190520 is not only the most active FRB that can be observed with Parkes, but also shows extreme rotation measure (RM) variations and unique behavior at 2 to 3 GHz frequency. This makes UWL the ideal instrument to carry out in-depth studies of this repeating FRB. With this program, we expect to detect a large sample of bursts from FRB~190520, and in collaboration with the FAST telescope, we will study the local environment, emission properties, fluence distributions, and polarisation properties over an extremely wide bandwidth with high sensitivity.

本研究拟依托帕克斯（Parkes）望远镜超宽带宽（UWL）系统，延续对活跃重复快速射电暴（Fast Radio Burst，FRB）~190520的每两周一次监测工作。现有观测结果显示，FRB~190520不仅是帕克斯望远镜可观测到的最为活跃的快速射电暴，同时还呈现出极端的旋转量度（Rotation Measure，RM）变化以及2~3 GHz频段下的独特行为特征。这使得UWL系统成为开展该重复快速射电暴深入研究的理想观测平台。通过本监测计划，我们预期将探测到FRB~190520的大量暴源样本；同时我们将与500米口径球面射电望远镜（Five-hundred-meter Aperture Spherical radio Telescope，FAST）开展合作，借助超高灵敏度与超宽带宽，对该暴源的局域环境、辐射特性、能通量分布及偏振特性展开研究。