Parkes observations for project P1229 semester 2023OCTS_05

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.

我们提出一项针对三颗毫秒脉冲星（millisecond pulsars）的脉冲星计时观测项目，这些脉冲星是此前在费米（Fermi）伽马射线源的脉冲星搜寻工作中发现的。尽管已开展初始后续观测尝试，但仍无法得到可用于探测预期伽马射线脉冲的脉冲星计时解（pulsar timing solution）。本次观测项目计划将一组高密度初始观测与间隔逐步增大的补充观测相结合，该自举（bootstrap）方法通常可有效约束脉冲星计时解的全部基本参数。成功探测到伽马射线脉冲，将可为射电与伽马射线辐射机制的探究以及多波段对应体搜寻工作提供支撑。或许更为关键的是，这将使这些脉冲星得以纳入伽马射线脉冲星计时阵列（gamma-ray pulsar timing array），通过新增观测基线提升阵列对低频引力波（low-frequency gravitational waves）的探测灵敏度。