IPTA DR2 - GWB analysis MCMC output

<strong>IPTA DR2 common red noise, MCMC output</strong><br> These files are the primary output from a Markov chain Monte Carlo (MCMC) sampling process. They are samples from the posterior probability distribution for a particular model described in the companion paper. Each zipped tarball contains four files. The "chain" file has several tab-separated columns, each of which corresponds to a model parameter, except the last four which are metadata. The parameter names (including metadata) are listed in the companion "params" file. The frequencies used in the common red noise models are listed in the "crn_frequencies" file. Additional information is provided in a README file. Each row of the chain file is one sample from the model posterior. The first samples at the beginning of the MCMC are the "burn-in" phase, before the chain has converged to the posterior. We recommend discarding the first ~25% of samples before using them to make inferences.<strong>国际脉冲星计时阵列第二数据发布（IPTA DR2）公共红噪声、马尔可夫链蒙特卡洛（MCMC）输出结果</strong><br> 本批次文件为马尔可夫链蒙特卡洛采样流程的核心输出产物，对应合作论文中所述特定模型的后验概率分布采样结果。每个压缩tar包均包含四个文件：其中名为"chain"的文件包含若干制表符分隔的列，除最后四列为元数据外，其余各列分别对应一个模型参数；参数名称（含元数据）已在配套的"params"文件中列明；公共红噪声模型所使用的频率已在"crn_frequencies"文件中列出；额外说明信息收录于README文件中。chain文件中的每一行均代表一次模型后验分布采样结果。MCMC流程初始阶段的首批采样属于"预烧（burn-in）"阶段，此时采样链尚未收敛至后验分布。建议在利用采样结果开展推断分析前，舍弃前约25%的采样数据。