Parkes observations for project P1170 semester 2022OCTS_13

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接收机开展总时长15.5小时的观测，以搜寻南天区域已知会产生巨脉冲（Giant Pulses, GPs）的全部7颗脉冲星的巨脉冲信号。UWL接收机尤其适配此类研究，因为此前已在已知巨脉冲发射源中观测到部分巨脉冲具有极窄的带宽特性，因此观测到的巨脉冲发生率大概率与频率高度相关。此外，该接收机的宽带宽特性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“带状效应”，这类效应与快速射电暴（fast radio bursts）光谱中观测到的同类效应相似。本次观测将可为揭示巨脉冲辐射的内在机制提供丰富的研究数据，并可对现有相关理论开展严格的检验。