Parkes observations for project P970 semester 2018APRS_21

During the past 6 years, we at Parkes and collaborators at other radio telescopes have been remarkably successful at discovering millisecond pulsars (MSPs) associated with unidentified Fermi-LAT gamma-ray sources. Based on lessons learned, we here propose to carry out targeted searches with the new Ultra-wideband Low (UWL) receiver that will be installed next semester. The ultra-wide frequency coverage will enable us to detect MSPs with steep spectrum and avoid difficulties caused by interstellar scintillation and dispersive and scattering smearing. We propose to revisit highly ranked pulsar candidates that remain unidentified. Such a pilot survey will help us designing future searches of the coming 4FGL gamma-ray source catalog using the UWL. The overall time request is 23 hours on source, or 26 hours including overheads.

过去六年间，帕克斯（Parkes）团队与其他射电望远镜的合作者们，在发现与未证认费米-LAT（Fermi-LAT）伽马射线源相关联的毫秒脉冲星（millisecond pulsars, MSPs）方面取得了显著成果。基于此前积累的工作经验，我们计划使用将于下学期安装的新型超宽带低频（Ultra-wideband Low, UWL）接收机开展定向搜寻工作。该超宽频段覆盖能力将使我们能够探测具有陡谱的毫秒脉冲星，同时规避星际闪烁、色散与散射展宽带来的观测难题。我们还提议对仍未得到证认的高优先级脉冲星候选体进行重新观测。此次试点巡天将有助于我们优化后续针对即将发布的4FGL伽马射线源星表、使用UWL接收机开展的搜寻方案。本次观测总有效耗时需求为23小时，包含观测开销在内总计26小时。