Parkes observations for project P1281 semester 2024OCTS_07

The physical origin of fast radio bursts (FRBs) has been hotly debated over the past decade until the discovery of bright radio bursts from the Galactic magnetar in 2020. The discovery of galactic FRBs has demonstrated that at least some faint FRBs can originate from normal magnetars. So far, only two active FRB repeaters are confirmed to be associated with persistent radio sources, which are normally interpreted as magnetar wind nebulae by theorists. From the most recent observations with the FAST and Parkes telescopes, we observed a particular radio source, VT 1137-0337, and we found several suspicious short-duration single pulse candidates whose dispersion measurements were very close. Notably, the signal found in the Parkes UWL data has a typical pulse width of 1 ms and exhibits an apparent broadband feature. We strongly request continuing to monitor this source with the Parkes UWL receiver, aiming to detect a significant FRB and directly reveal the nature of the active FRB repeaters.

快速射电暴（fast radio bursts, FRBs）的物理起源在过去十年间始终是学界热议的焦点问题，直至2020年银河系磁星爆发明亮射电暴的相关发现。此次银河系快速射电暴的发现证实，至少有部分微弱快速射电暴可起源于常规磁星。截至目前，仅有两例活跃快速射电暴复现源被证实与持续射电源相关联，理论研究者通常将这类持续射电源解读为磁星风星云。基于近期使用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（Parkes Telescope）开展的观测，我们对特殊射电源VT 1137-0337进行了观测，并发现了多颗色散测量值极为接近的疑似短时长单脉冲候选体。值得注意的是，在帕克斯UWL数据中发现的信号具有典型的1毫秒脉冲宽度，并呈现出明显的宽频特征。我们强烈呼吁使用帕克斯UWL接收机对该源开展持续监测，以期探测到明确的快速射电暴信号，直接揭示活跃快速射电暴复现源的本质。