Parkes observations for project P1183 semester 2024OCTS_15

After nearly two years of monitoring, comprising 126.7 hours over 57 observations with the Parkes telescope and 49.4 hours across 101 observations with the FAST telescopes, we have determined that FRB 20220529 is an extremely active repeater. It exhibits one of the longest activity durations and a potential period. Due to frequent observations scheduled with both Parkes and FAST, we recently observed an abrupt rotation measure (RM) flare in this source. This is the first detection of such an ``RM flare'' in a fast radio burst (FRB), suggesting that the source is in an environment with occasionally erupting coronal mass ejection. This presents a unique opportunity to study the eruption environment of FRBs and investigate the relation between burst activity and other burst parameters. If confirmed, the periodicity and the ``RM flare'' of FRB 20220529 would corroborate each other and become a ``smoking gun'' of the binary origin of FRB. In our previous analysis, both Parkes and FAST observations have proven essential. While FAST's higher sensitivity has enabled the capture of many bursts, Parkes' wideband receiver has provided a good burst detection rate even during low-rate phases. Notably, during the RM flare, two high signal-to-noise ratio bursts from Parkes have been crucial in understanding the RM variations. To further investigate FRB 20220529, we have scheduled regular FAST observations every fortnight, monitoring the source for 20 minutes each time. Therefore, we also propose to monitor FRB 20220529 using the Parkes UWL receiver, ensuring high-time resolution and employing full-polarization observations.经过近两年的监测，我们使用帕克斯望远镜（Parkes telescope）累计开展57次观测、总时长126.7小时，使用500米口径球面射电望远镜（FAST）累计开展101次观测、总时长49.4小时，由此判定FRB 20220529是一颗极活跃的重复快速射电暴。它拥有目前已知最长的活动持续时长之一，并展现出潜在的周期特性。得益于帕克斯望远镜与FAST的高频观测计划，我们近期首次在该源中观测到突发性旋转测量（RM）耀发现象——这是人类首次在快速射电暴（FRB）中探测到此类‘RM耀发’事件，暗示其所处环境存在偶发的日冕物质抛射活动。这为研究快速射电暴的爆发环境、探究爆发活动与其他爆发参数间的关联提供了独一无二的契机。若该周期性与‘RM耀发’现象均得到验证，二者将互为佐证，成为快速射电暴双星起源的决定性证据。在我们此前的分析中，帕克斯望远镜与FAST的观测数据均发挥了关键作用：FAST的高灵敏度助力我们捕获了大量爆发事件，而帕克斯望远镜的宽带接收机即便在爆发率较低的阶段，也能保持出色的爆发探测效率。值得注意的是，在RM耀发期间，帕克斯望远镜观测到的两例高信噪比爆发事件，对我们理解旋转测量值的变化起到了至关重要的作用。为进一步研究FRB 20220529，我们已计划每两周开展一次FAST常规观测，每次对该源进行20分钟的监测。据此，我们同时提议使用帕克斯望远镜的UWL接收机对FRB 20220529开展监测，采用全偏振观测模式以保障高时间分辨率。