Parkes observations for project P1193 semester 2023APRS_06

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.

本研究针对ASKAP快速连续谱巡天低波段（RACS-low，888 MHz）与高波段（RACS-high，1667 MHz）的联合数据开展陡谱源搜寻，期间共发现14个具有极陡射电谱（α < -1.6）且与费米（Fermi）未关联源匹配的致密天体。此类兼具极陡射电谱与伽马射线辐射的源，大概率属于此前未被证认的脉冲星。我们提议使用穆里扬（Murriyang，原帕克斯Parkes）超宽频（UWL）接收机对这些目标开展观测。本次深度靶向脉冲星搜寻工作，将助力我们证认极端系统或极端环境中的新型脉冲星，例如致密双星系统中的脉冲星以及受强烈散射影响的脉冲星。