Parkes observations for project P1101 semester 2024APRS_05

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.

本项研究计划依托帕克斯（Parkes）UWL系统，对极活跃的重复快速射电暴（Fast Radio Burst, FRB）20190520B开展每两周一次的持续监测。现有观测结果表明，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，同时展现出极端的旋转量度（Rotation Measure, RM）与弥散量度（Dispersion Measure, DM）演化特征，以及2~3 GHz频段内的独特行为。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仪器。通过本监测项目，我们预期可探测到FRB 20190520B的大量暴脉冲样本，并将与500米口径球面射电望远镜（Five-hundred-meter Aperture Spherical radio Telescope, FAST）及绿岸望远镜（Green Bank Telescope, GBT）开展合作，依托极高灵敏度，在极宽带宽范围内对其局域环境、辐射特性、能流密度分布及偏振特性展开研究。