Parkes observations for project P1183 semester 2023OCTS_01

We have detected a total of 48 bursts of FRB 20220529 using the Parkes UWL receiver, with 29 of them detected during full polarization observations. Our previous cooperating observations of FAST and Parkes for FRB 20220529 have revealed significant variations in flux distribution during different active periods. However, only 3 bursts from Parkes have been observed simultaneously with FAST, one of which has the potential to improve the spectrum limits of repeating FRBs by more than an order of magnitude. To further investigate FRB 20220529, we have scheduled regular FAST observations every fortnight, tracking the source for 20 minutes each time. Additionally, we have been granted another 10 hours of FAST time to facilitate simultaneous observations of FRB 20200529 using both the FAST and Parkes telescopes. Therefore, we propose to continue monitoring the source of FRB 20220529 using the Parkes UWL receiver, ensuring high-time resolution and employing full-polarization observations to: (1) detect more bursts using the Parkes UWL receiver, with corresponding simultaneous observations from FAST, in order to obtain robust constraints on the radiation spectrum of repeating FRBs; (2) explore additional clues regarding the active periods of FRB 20220529; (3) study the microstructure of the bursts.

我们利用帕克斯（Parkes）UWL接收机共计探测到48次快速射电暴（FRB）20220529的爆发事件，其中29次是在全偏振观测中被捕获的。此前我们针对快速射电暴20220529开展的500米口径球面射电望远镜（Five-hundred-meter Aperture Spherical radio Telescope, FAST）与帕克斯望远镜的协同观测研究显示，该源在不同活跃时段的流量分布存在显著差异。然而，帕克斯望远镜仅探测到3次可与FAST开展同步观测的爆发事件，其中1次爆发有望将重复快速射电暴的谱段极限提升一个数量级以上。为进一步开展快速射电暴20220529的相关研究，我们已规划定期FAST观测计划：每两周开展一次观测，每次对该源进行20分钟的跟踪观测。此外，我们已获批额外10小时的FAST观测时长，用于开展快速射电暴20200529的FAST与帕克斯望远镜同步观测工作。因此，我们提出继续利用帕克斯UWL接收机对快速射电暴20220529源开展监测工作，采用高时间分辨率模式并实施全偏振观测，以实现以下研究目标：（1）借助帕克斯UWL接收机探测更多爆发事件，并同步开展FAST观测，从而对重复快速射电暴的辐射光谱获得可靠的约束；（2）探索快速射电暴20220529活跃时段的额外观测线索；（3）研究爆发事件的微观结构。