Official data release to accompany the first NOvA Bayesian results paper, https://arxiv.org/abs/2311.07835. The included `README.md` below describes the contents more fully, but in short, included here are:
* A `README.md` describing the files
* Four `.root` files containing marginal posterior densities in neutrino oscillation parameters, and associated 1D and 2D credible regions derived from them
* One `.root` file containing a `TTree` with Markov Chain Monte Carlo samples, which can be used to recreate the posteriors above. **Please use the URL below to download this large (2GB) file** https://mod.fnal.gov/cwsmod/n/nova_docdb_ext/arxiv-2311.07835.data-release.mcmcsamples.root
* One Jupyter notebook giving extensive examples how the MCMC samples above can be used