Parkes observations for project P970 semester 2018APRS_17

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.

过往六年间，我们帕克斯（Parkes）团队与其他射电望远镜的合作者，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（MSPs）方面取得了显著进展。基于此前积累的经验教训，我们计划利用将于下学期安装的新型超宽带低频（UWL）接收机开展定向搜索。该接收机的超宽频覆盖能力，将使我们能够探测到具有陡谱的毫秒脉冲星，同时规避星际闪烁、色散展宽与散射展宽带来的观测困难。我们还计划重新审视那些尚未证认的高优先级脉冲星候选体。此类先导巡天将有助于我们规划后续利用UWL接收机对即将发布的4FGL伽马射线源目录开展的搜索工作。本次申请的总观测时长为23小时的源跟踪观测时间，若包含各类观测开销则总计26小时。