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). Each dataset is stored in a separate HDF5 (.h5) file, which can be downloaded at The Zenodo Page of TDC II (please make sure to download the latest version). For Challenge 0 – 2, a TDI-combined and downsampled version can be downloaded at The Zenodo Page of TDC II-XYZ.
• Challenge 0: the "Verification" Datasets
TDC II-0.1: verification Galactic binaries
TDC II-0.2: single massive black hole binary
• Challenge 1: the "Global Fit" Dataset
TDC II-1.1: multiple sources, shown in frequency domain (left) and time domain (right)
• Challenge 2: the "Single Source" Datasets
TDC II-2.1: Galactic binaries
TDC II-2.2: overlapping massive black hole binaries
TDC II-2.3: massive black hole binaries with eccentricity and higher harmonics, zoomed in around one of the mergers
TDC II-2.5: extreme mass-ratio inspiral, only one of TDC II-2.4/2.5/2.6/2.7 is shown as a representative case
TDC II-2.8: stochastic gravitational wave background
TDC II-2.9: stochastic gravitational wave background (another profile)
• Challenge 3: the "End-to-End" Dataset
TDC II-3.1: raw inter-spacecraft interferometer readouts
• Challenge 4: the "Up-to-Date" Dataset
TDC II-4.1: raw inter-spacecraft interferometer readouts, gap shown as a black vertical line