Parkes observations for project P1170 semester 2022OCTS_02

We request 15.5 hours of observations with the Parkes UWL receiver to search for giant pulses (GPs) in all seven pulsars in the Southern sky which are known to exhibit this phenomenon. The UWL receiver is particularly well-suited to such a study, since some GPs from known emitters have been found to be very narrow-band and so the observed emission rate is likely to be highly frequency-dependent. Additionally, the wide bandwidth allows one to detect spectral structures such as the 'banding' effect recently observed in GPs from some pulsars, similar to that observed in the spectra of fast radio bursts. These observations should provide a wealth of information about the underlying GP emission mechanism, and a stringent test of current theories.

我们申请使用帕克斯UWL接收机（Parkes UWL receiver）开展15.5小时的观测，以搜寻南天已知会产生巨脉冲（giant pulses, GPs）的全部7颗脉冲星的巨脉冲信号。该UWL接收机尤其适配此类研究，因为已有研究证实，部分已观测到的巨脉冲辐射源的信号具有极窄的带宽特性，因此其观测到的辐射事件发生率极有可能与频率高度相关。此外，该接收机的宽带宽特性可用于探测谱结构，例如近期在部分脉冲星的巨脉冲中发现的「条纹效应（banding effect）」，该现象与快速射电暴（fast radio bursts）光谱中观测到的同类效应一致。本次观测将为揭示巨脉冲辐射的内在物理机制提供丰富的科研数据，并可对现有相关理论开展严苛的检验。