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.

我们提议依托帕克斯UWL系统，持续对极具活跃度的快速射电暴复现源FRB 20190520B开展每两周一次的监测。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为活跃的快速射电暴源，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，以及在2至3 GHz频段下的独特行为模式。这使得帕克斯UWL系统成为对该复现快速射电暴源开展深度研究的理想仪器。本项目预计将探测到FRB 20190520B的大量爆发事件样本；同时，我们将与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）合作，在极宽带宽范围内以高灵敏度开展研究，解析其局域环境、辐射特性、能流分布与偏振特性。