Parkes observations for project P1101 semester 2024APRS_01

We propose to continue our fortnightly monitoring of a very active repeater, FRB 20190520B, with the Parkes UWL system. Our current observations show that FRB 20190520B is not only the most active FRB that can be observed with Parkes, but also shows extreme rotation measure (RM) and dispersion measure (DM) evolution 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 20190520B, and in collaboration with FAST and GBT, we will study its local environment, emission properties, fluence distributions, and polarisation properties over an extremely wide bandwidth with high sensitivity.

我们提议继续使用帕克斯（Parkes）UWL系统，对活跃度极高的重复快速射电暴（Fast Radio Burst, FRB）20190520B开展每两周一次的监测。当前观测结果表明，FRB 20190520B不仅是帕克斯望远镜可观测到的最为活跃的快速射电暴，还展现出极端的旋转测量（rotation measure, RM）与色散测量（dispersion measure, DM）演化特性，以及在2至3吉赫（GHz）频段下的独特行为。这使得UWL系统成为对该重复快速射电暴开展深入研究的理想工具。通过本项目，我们预期将探测到FRB 20190520B的大量爆发样本；同时，我们将与500米口径球面射电望远镜（Five-hundred-meter Aperture Spherical Telescope, FAST）及绿岸望远镜（Green Bank Telescope, GBT）开展合作，借助极宽带宽与高灵敏度的观测条件，研究该源的局域环境、辐射特性、能流分布与偏振特性。