Parkes observations for project P1193 semester 2023APRS_02

In a search for steep spectrum sources in the combined data from the Rapid ASKAP Continuum Survey Low-band (RACS-low at 888 MHz) and high-band (RACS-high at 1667 MHz), we have found 14 compact objects with an ultra steep radio spectrum (\alpha < -1.6) and matched with a Fermi unassociated source. Sources with ultra steep radio spectra and gamma-ray emission are likely to be previously unidentified pulsars. We propose to observe these targets with Murriyang (Parkes) UWL receiver. The deep targeted pulsar search will help us confirm new pulsars in extreme systems or environments, such as pulsars in compact binaries, and highly scattered pulsars.

在对Rapid ASKAP连续谱巡天低频段（RACS-low，888 MHz）与高频段（RACS-high，1667 MHz）的联合数据进行陡峭谱源（steep spectrum source）搜索时，我们发现了14个具有超陡峭射电谱（ultra steep radio spectrum，α < -1.6）且与费米（Fermi）未关联源匹配的致密天体。具有超陡峭射电谱和伽马射线（gamma-ray）辐射的源可能是此前未被识别的脉冲星（pulsar）。我们建议使用Murriyang（Parkes）UWL接收器对这些目标进行观测。深度靶向脉冲星搜索将帮助我们确认极端系统或环境中的新脉冲星，例如致密双星中的脉冲星和高散射脉冲星。