Parkes observations for project P1101 semester 2022OCTS_15

We propose to carry out 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.

我们提议利用帕克斯UWL系统，对活跃度极高的重复快速射电暴FRB 190520开展每两周一次的监测工作。基于现有观测结果，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，以及在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仪器。通过本观测计划，我们预计将探测到FRB 190520的大量暴事件样本；同时将与500米口径球面射电望远镜（Five-hundred-meter Aperture Spherical radio Telescope, FAST）开展合作，依托高灵敏度在超宽带宽范围内，对该暴的局域环境、辐射特性、能通量分布以及偏振特性展开系统性研究。