Parkes observations for project P1101 semester 2024OCTS_09

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.

我们拟利用帕克斯超宽带宽（Parkes UWL）系统，对高活跃重复快速射电暴FRB 20190520B开展每两周一次的持续监测。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活跃快速射电暴，还呈现出极端的旋转量度（RM）与弥散量度（DM）演化特性，以及在2至3吉赫频段下的独特辐射行为。这使得UWL系统成为针对该重复快速射电暴开展深入研究的理想设备。通过本项目，我们预期将探测到FRB 20190520B的大量爆发事件，并将联合FAST（500米口径球面射电望远镜）与GBT（绿岸望远镜），以高灵敏度在超宽带宽范围内研究其局域环境、辐射特性、能注量分布以及偏振特性。