Parkes observations for project P1101 semester 2024OCTS_02

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.

本研究提议利用帕克斯UWL系统，对极为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，同时还展现出极端的旋转量度（Rotation Measure, RM）与色散量度（Dispersion Measure, DM）演化特征，以及2~3 GHz频段下的独特行为模式。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设备。通过本项目，我们预期将探测到FRB 20190520B的大量暴脉冲样本，并将联合500米口径球面射电望远镜（Five-hundred-meter Aperture Spherical radio Telescope, FAST）与绿岸望远镜（Green Bank Telescope, GBT），在超宽带宽下以高灵敏度对其局域环境、辐射特性、能流分布及偏振特性开展研究。