Parkes observations for project P1071 semester 2020OCTS_04

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.

间歇脉冲星（intermittent pulsars）是当前脉冲星研究的重要方向，它们是连接脉冲星辐射研究与脉冲星自转不规则性的直接纽带。新型超宽低频（Ultra-Wide-Low, UWL）接收机拥有前所未有的频率覆盖范围，可助力我们细致深入地研究间歇脉冲星的辐射特性。我们申请利用UWL接收机对间歇脉冲星开展观测。这类脉冲星的辐射会以数日至数年不等的长周期切换通断状态。我们将测定辐射切换时标的分布规律及其频率依赖性，搜寻辐射关闭状态下的弱辐射或爆发式辐射，确定通断辐射过程的带宽、辐射的光谱特性、宽带脉冲能量分布的演化规律，并探索长、短期辐射变异性之间的潜在关联。本次观测将有助于我们深入理解这类脉冲星的辐射机制，以及辐射随时间与频率的变化规律。