Parkes observations for project P1229 semester 2024APRS_02

We propose a pulsar timing campaign of three millisecond pulsars discovered in previous pulsar searches of Fermi gamma-ray sources. Despite an original follow-up effort, it was not possible to produce a pulsar timing solution with which to detect the expected gamma-ray pulsations. The proposed campaign combines a set of dense, initial observations with additional observations at increasing separation, a bootstrap approach which is generally successful at constraining all the fundamental parameters of the pulsar timing solution. Securing the gamma-ray pulsations will enable probes of the radio and gamma-ray emission mechanisms and searches for multi-wavelength counterparts. And perhaps more importantly, it will allow these pulsars to be incorporated into the gamma-ray pulsar timing array, providing additional baselines which will increase its sensitivity to low-frequency gravitational waves.我们提出针对三颗毫秒脉冲星（millisecond pulsar）的脉冲星计时观测计划，这些脉冲星是此前在费米伽马射线源（Fermi gamma-ray source）的脉冲星搜寻工作中发现的。尽管已开展初步后续观测工作，但仍无法得到可用于探测预期伽马射线脉冲（gamma-ray pulsation）的脉冲星计时解（pulsar timing solution）。本次拟开展的观测计划将一系列高密度初始观测与观测间隔逐步增大的补充观测相结合，这种自举方法（bootstrap approach）通常可有效约束脉冲星计时解的全部基础参数。成功探测到伽马射线脉冲后，将可开展射电与伽马射线辐射机制的研究，并搜寻多波段对应体。或许更为重要的是，这将使这些脉冲星能够被纳入伽马射线脉冲星计时阵列（gamma-ray pulsar timing array），通过新增的观测基线提升该阵列对低频引力波的探测灵敏度。