mJPC2470-1771 and J-spectra examples. Top panel: miniJPAS view of mJPC2470-1771. Prominent red and blue galaxies in the cluster are marked with red and blue circles, respectively. The BCG corresponds to 2470-1771, with an spectroscopic redshift of z = 0.289. Bottom panel: MAG_PSFCOR J-spectra of three red galaxies (top row) and three blue galaxies (bottom row) that are marked with circles in the top panel. The mean model fitted by BaySeAGal is plotted as black points, and the grey band shows the magnitudes of the mean model ± one σ uncertainty level. The difference between the model and the best model fitted magnitudes are plotted as a small coloured points around the black bottom line. Masked filter (white coloured circles) and filters overlapping with the emission lines Hα, [NII], [OIII], Hβ, and [OII] (darker grey coloured circles) are not used in the fit. Grey vertical dashed lines show the wavelengths corresponding to detectable emission lines.