Parkes observations for project P1101 semester 2024APRS_03

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.

我们提议利用帕克斯（Parkes）UWL系统，持续对活动极为频繁的快速射电暴（Fast Radio Burst, FRB）重复暴源FRB 20190520B开展每两周一次的监测。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活跃快速射电暴，还展现出极端的旋转量度（RM）与色散量度（DM）演化特征，以及在2至3吉赫兹频段下的独特爆发行为。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设备。通过本项目，我们预期将探测到FRB 20190520B的大样本爆发事件；同时我们将与FAST及GBT合作，借助超高灵敏度与超宽带宽，对该源的局域环境、辐射特性、能注量分布及偏振特性展开系统研究。