Taiji Data Challenge II (TDC II) comprises 5 groups of datasets (Challenge 0 - 4), each targeting specific challenge topics. Except for Challenge 0 designed as illustrative examples for the access and use of TDC II, most of the remaining datasets are blind (i.e. the source parameters are unknown).

An outline for the challenges:
• Challenge 0: the “Verification” Datasets
• Challenge 1: the “Global Fit” Dataset
• Challenge 2: the “Single Source” Datasets
• Challenge 3: the “End-to-End” Dataset
• Challenge 4: the “Up-to-Date” Dataset

Each dataset is stored in a separate HDF5 (.h5) file. Please visit the Challenges page to access the download links and diagrams of data. Detailed descriptions on the challenge topics and datasets, as well as how the datasets are created can be found in the Documents page (see the TDC II paper and TDC II manual).
Instructions and examples on how to use these data are provided in the Tutorials of Triangle (the TDC II toolkit, also see the Documents page). Please make sure to read the README files before use.