Parkes observations for project P1170 semester 2022OCTS_16

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（Parkes）UWL接收机开展总计15.5小时的观测，旨在搜寻南天球天区中7颗已知存在巨脉冲（Giant Pulses, GPs）现象的脉冲星的巨脉冲信号。UWL接收机尤其适配此类研究，因已有研究发现，部分已知辐射源发出的巨脉冲具有极窄带宽特征，其观测到的发射率大概率高度依赖于频率。此外，该接收机的宽带宽特性可用于探测频谱结构，例如近期在部分脉冲星的巨脉冲中观测到的“带状效应”（banding effect），该现象与快速射电暴（Fast Radio Bursts, FRB）频谱中观测到的特征类似。本次观测将为揭示巨脉冲辐射的潜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检验。