We describe 14 yr of public data from the Parkes Pulsar Timing Array (PPTA), an ongoing project that is producing precise measurements of pulse times of arrival from 26 millisecond pulsars using the 64-m Parkes radio telescope with a cadence of approximately 3 weeks in three observing bands. A comprehensive description of the pulsar observing systems employed at the telescope since 2004 is provided, including the calibration methodology and an analysis of the stability of system components. We attempt to provide full accounting of the reduction from the raw measured Stokes parameters to pulse times of arrival to aid third parties in reproducing our results. This conversion is encapsulated in a processing pipeline designed to track provenance. Our data products include pulse times of arrival for each of the pulsars along with an initial set of pulsar parameters and noise models. The calibrated pulse profiles and timing template profiles are also available. These data represent almost 21 000 h of recorded data spanning over 14 yr. After accounting for processes that induce time-correlated noise, 22 of the pulsars have weighted root-mean-square timing residuals of$<\!\!1\,\mu\text{s}$in at least one radio band. The data should allow end users to quickly undertake their own gravitational wave analyses, for example, without having to understand the intricacies of pulsar polarisation calibration or attain a mastery of radio frequency interference mitigation as is required when analysing raw data files.

中文翻译：

---

Parkes Pulsar Timing Array 项目：第二次数据发布

我们描述了来自帕克斯脉冲星计时阵列 (PPTA) 的 14 年公共数据，这是一个正在进行的项目，使用 64 米帕克斯射电望远镜以大约 3 周的节奏对 26 毫秒脉冲星的脉冲到达时间进行精确测量。三个观测波段。提供了自 2004 年以来望远镜使用的脉冲星观测系统的全面描述，包括校准方法和系统组件稳定性分析。我们试图提供从原始测量斯托克斯参数到脉冲到达时间的减少的完整计算，以帮助第三方重现我们的结果。这种转换被封装在一个旨在跟踪出处的处理管道中。我们的数据产品包括每个脉冲星的脉冲到达时间以及一组初始脉冲星参数和噪声模型。校准的脉冲轮廓和定时模板轮廓也可用。这些数据代表了跨越 14 年的近 21 000 小时的记录数据。在考虑了引起时间相关噪声的过程后，22 颗脉冲星的加权均方根时间残差为$<\!\!1\,\mu\text{s}$在至少一个无线电频段。这些数据应允许最终用户快速进行自己的引力波分析，例如，无需了解脉冲星极化校准的复杂性或掌握分析原始数据文件时所需的射频干扰缓解。