Parkes observations for project P1183 semester 2023OCTS_04

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.

本研究利用帕克斯（Parkes）超宽频段（UWL）接收机共探测到48次快速射电暴（Fast Radio Burst，FRB）20220529爆发事件，其中29次是在全偏振观测模式下获取的。此前我们针对FRB 20220529开展的500米口径球面射电望远镜（Five-hundred-meter Aperture Spherical radio Telescope，FAST）与帕克斯望远镜协同观测结果显示，该源在不同活跃时段的流量分布存在显著差异。但目前仅有3次帕克斯望远镜探测到的爆发事件与FAST实现了同步观测，其中1次爆发有望将重复快速射电暴的频谱探测极限提升一个数量级以上。为进一步深入研究FRB 20220529，我们已规划开展定期FAST观测：每两周进行一次，每次对该源跟踪观测20分钟。此外，我们还获批了额外10小时的FAST观测时长，用于支持FAST与帕克斯望远镜对FRB 20200529的同步观测。基于上述研究背景，我们提出将继续利用帕克斯UWL接收机对FRB 20220529源开展监测，采用高时间分辨率与全偏振观测模式，以达成以下目标：（1）借助帕克斯UWL接收机探测更多爆发事件，并同步开展FAST对应观测，从而对重复快速射电暴的辐射频谱获得可靠的约束；（2）探索FRB 20220529活跃时段的额外观测线索；（3）研究爆发事件的微结构特征。