Parkes observations for project P1071 semester 2020OCTS_05

Intermittent pulsars are a major topic of current pulsar research as they provide a direct link between studies of pulsar emission and irregularities in the rotation of the pulsars. The new Ultra-Wide-Low(UWL) receiver provides unprecedented frequency coverage and will allow us to study the emission properties of the intermittent pulsars in great detail. We request observations with the UWL receiver to intermittent pulsars. These are pulsars whose emission switches on and off at long intervals from days to years. We will determine the distribution and frequency dependence of the time scales, look for weak or bursty emission in the off states and determine the bandwidth of the on/off emission process, the spectral characteristics of the emission, the evolution of pulse energy distribution over wide-band and search for possible link between long- and short-term emission variability. These observations will provide insights into how these pulsars emit and how that emission is changing in time and as a function of frequency.

间歇性脉冲星（Intermittent pulsars）是当前脉冲星研究的重要前沿课题，其为脉冲星辐射研究与脉冲星自转不规则性研究搭建了直接的关联纽带。新型超宽低频（Ultra-Wide-Low, UWL）接收机具备前所未有的频率覆盖范围，可支持我们对间歇性脉冲星的辐射特性开展精细化研究。我们申请利用该UWL接收机对间歇性脉冲星开展观测工作。此类脉冲星的辐射会以数日至数年的长周期在开启与关闭状态间切换。本研究将测定此类脉冲星辐射启闭时间尺度的分布规律及其频率依赖性，搜寻宁静态下的弱辐射或爆发式辐射，确定启闭辐射过程的带宽、辐射的光谱特性，探究宽带脉冲能量分布的演化特性，并探寻长期与短期辐射变异性之间的潜在关联。本次观测将助力我们深入理解此类脉冲星的辐射机制，以及辐射随时间与频率变化的规律。