Parkes observations for project P970 semester 2018APRS_18

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在发现与未证认费米大面积望远镜（Fermi-LAT）伽马射线源相关联的毫秒脉冲星（millisecond pulsars, MSPs）方面取得了显著进展。基于此前积累的观测经验，我们提议利用将于下学期安装的超宽带低（UWL）接收机开展靶向搜寻工作。该接收机的超宽频率覆盖范围将使我们能够探测谱指数较陡的毫秒脉冲星，同时规避星际闪烁、色散展宽与散射展宽带来的观测难题。我们还提议重新审视那些仍未得到证认的高评级脉冲星候选体。这类先导巡天将有助于我们规划未来利用超宽带低接收机开展的第四费米伽马射线源目录（4FGL）伽马射线源搜寻工作。本次观测的总源观测时长需求为23小时有效源观测时间，含观测开销在内总计26小时。