Parkes observations for project P1193 semester 2023APRS_04

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.

本研究在ASKAP快速连续谱巡天（Rapid ASKAP Continuum Survey）低频段（RACS-low，888 MHz）与高频段（RACS-high，1667 MHz）的联合观测数据中搜寻陡谱射电源，共发现14个具有极陡射电谱（α < -1.6）且与费米未关联源（Fermi unassociated source）匹配的致密天体。具备极陡射电谱并伴随伽马射线辐射的射电源，大概率属于此前未被认证的脉冲星。我们提议使用Murriyang（帕克斯Parkes）UWL接收机对这批目标开展观测。本次深度靶向脉冲星搜寻工作，将助力我们在极端系统或环境中确认新型脉冲星，例如密近双星中的脉冲星以及散射特性极强的脉冲星。