Parkes observations for project P1170 semester 2022OCTS_12

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超宽带（UWL）接收器进行15.5小时的观测，以搜索南天已知存在巨脉冲（giant pulses，GPs）现象的全部七颗脉冲星中的巨脉冲。UWL接收器特别适合此类研究，因为已知发射源产生的部分巨脉冲被发现具有极窄的带宽，因此观测到的发射率可能具有高度的频率依赖性。此外，其宽频带特性使其能够探测光谱结构，例如最近在部分脉冲星的巨脉冲中观测到的“条带化”效应（banding effect）——这一效应与快速射电暴光谱中观测到的现象相似。这些观测将为巨脉冲的潜在发射机制提供丰富信息，并对现有理论构成严格检验。