Parkes observations for project P1170 semester 2022OCTS_14

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接收机开展总计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。UWL接收机尤为适配此类研究，因为已有观测发现，部分已知脉冲星的巨脉冲信号具有极窄的带宽，因此其辐射强度大概率与频率高度相关。此外，该接收机的超宽带宽可用于探测光谱结构，例如近期在部分脉冲星的巨脉冲中观测到的'banding'效应，该特征与快速射电暴光谱中观测到的同类现象相似。此次观测将为揭示巨脉冲的核心辐射机制提供大量宝贵数据，并对现有相关理论开展严格的检验。