Parkes observations for project P1101 semester 2023OCTS_02

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.

我们提议依托帕克斯UWL（Parkes UWL）系统，持续对极为活跃的重复快速射电暴（Fast Radio Burst，FRB）~190520开展每两周一次的监测工作。当前观测结果显示，FRB~190520不仅是帕克斯望远镜可观测到的最活跃快速射电暴，还展现出极端的旋转量度（Rotation Measure，RM）变化，以及在2至3 GHz频段内的独特辐射特性。这使得UWL系统成为开展该重复快速射电暴深度研究的理想仪器。依托本项目，我们预期将探测到FRB~190520的大量暴源样本；同时将与500米口径球面射电望远镜（Five-hundred-meter Aperture Spherical radio Telescope，FAST）展开合作，借助极高灵敏度在超宽频带范围内，对该源的局域环境、辐射特性、能流密度分布与偏振特性开展系统性研究。