Parkes Pulsar Timing Array Third Data Release (part 1 of 2)

We present the third data release from the Parkes Pulsar Timing Array (PPTA) project. The release contains observations of 32 pulsars obtained using the 64-m Parkes "Murriyang" radio telescope. The data span is up to 18 years with a typical cadence of 3 weeks. This data release is formed by combining an updated version of our second data release with ~sim 3 years of more recent data primarily obtained using an ultra-wide-bandwidth receiver system that operates between 704 and 4032 MHz. We provide calibrated pulse profiles, flux-density dynamic spectra, pulse times of arrival, and initial pulsar timing models. We describe methods for processing such wide-bandwidth observations, and compare this data release with our previous release.

我们公布了帕克斯脉冲星计时阵列（Parkes Pulsar Timing Array，PPTA）项目的第三期数据发布成果。本次发布包含利用64米口径帕克斯“穆里扬”（Murriyang）射电望远镜获取的32颗脉冲星观测数据。该数据集的观测时长最长可达18年，典型观测间隔为3周。本次数据发布整合了我们第二期数据发布的更新版本，以及约3年的最新观测数据；后者主要依托工作频段为704至4032 MHz的超宽带接收机系统获取。我们提供了经过校准的脉冲轮廓、流量密度动态频谱、脉冲到达时间以及初始脉冲星计时模型。我们详述了此类宽带观测数据的处理方法，并将本次数据发布成果与此前的发布版本进行了对比分析。