Parkes observations for project P1229 semester 2024APRS_06

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）的脉冲星计时观测计划，这些天体是此前在费米（Fermi）伽马射线源的脉冲星搜寻工作中发现的。尽管已开展初步的后续观测尝试，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）。本计划将一系列高密集度的初始观测与间隔逐步增大的补充观测相结合，采用一种通常可有效约束脉冲星计时解全部基础参数的自举法（bootstrap approach）。成功获取伽马射线脉冲信号后，将可用于研究射电与伽马射线的辐射机制，并开展多波段对应体的搜寻工作。而更为关键的是，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阵列对低频引力波（low-frequency gravitational waves）的探测灵敏度。