BANNJOS-SP J-PLUS DR4: Bayesian Stellar Parameters for 7.46 Million Stars

BANNJOS-SP J-PLUS DR4 is a value-added catalog of Bayesian stellar parameters derived with BANNJOS (del Pino et al. 2024) for 7,455,928 J-PLUS DR4 (Cenarro et al. 2019) sources classified as stars with more than 66% of probability and magnitudes $r > 18.5$ mag. For each source, the catalog provides J-PLUS identifiers, J2000 equatorial coordinates, and posterior summaries for $T_{\rm eff}$, $\log g$, $[\mathrm{Fe/H}]$, $[\alpha/\mathrm{M}]$, and extinction $E_{\rm E23}$ (Edenhofer et al. 2023). The posterior of each parameter is summarized by the mean, dispersion, median, and nominal $1\sigma$, and percentile intervals, while pairwise correlation coefficients encode degeneracies among the inferred stellar parameters. The missing_training_columns field records the number of unavailable BANNJOS input features at prediction time and can be used as a quality flag for selecting robust subsamples. The catalog only contains stars with uncertainties smaller than $\sigma(T_{\rm eff}) = 300k$ and $\sigma(\log g)$ = 0.5$ dex.