While searching for radial velocity variations and thus binary stars with our survey of 25 Galactic globular clusters, we came across with one curious star. After analysing the strong radial velocity signal and the observed properties of this star, the binary system appears to be most likely a main-sequence turn-off star orbiting around a detached stellar-mass black hole with at least four times the mass of the sun.

This data release contains all spectra from the two papers about the commissioning cluster NGC 6397.

We provide the radial profiles for 22/25 clusters as they were published in Kamann et al. (2017,  arxiv:1710.07257). We kindly ask you to cite this paper when using the data.

The data set for each cluster is provided as a plain csv-file, containing one radial bin per line.

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