Parkes observations for project P1170 semester 2022OCTS_08

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）现象的全部7颗脉冲星的巨脉冲。UWL接收机尤其适配此类研究，因为已知的巨脉冲发射源所产生的部分巨脉冲被证实为极窄带信号，因此观测到的脉冲发射率很可能具有极强的频率依赖性。此外，该接收机的宽带宽可支持探测光谱结构，例如近期在部分脉冲星的巨脉冲中观测到的“条带化”效应，该效应与快速射电暴（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的潜在发射机制提供丰富数据，并对现有理论开展严格的检验。