Parkes observations for project P1101 semester 2024APRS_07

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.

我们计划利用帕克斯超宽带系统（Parkes UWL）继续对活跃重复快速射电暴源FRB 20190520B开展每两周一次的监测。现有观测表明，FRB 20190520B不仅是帕克斯望远镜可观测范围内最活跃的快速射电暴源，还呈现出极端的旋转量（RM）与色散量（DM）演化特征，以及在2至3 GHz频段的独特行为。这使得超宽带系统（UWL）成为对该重复快速射电暴源开展深入研究的理想工具。通过本项目，我们预计将探测到FRB 20190520B的大量爆发事件样本；并将与500米口径球面射电望远镜（FAST）及格林班克望远镜（GBT）合作，在极宽频段内以高灵敏度研究其局域环境、辐射特性、通量分布及偏振特性。