Example ALSTAR fits for individual spaxels in different regions of M51 and M63. Colored lines with error bars show the data (O_λ), while black lines show the model photometric fluxes (M_λ), and the gray lines show the corresponding high-resolution model spectrum. Images on the right show a 1.5′×1.5′ zoom of composites built with the J0660, r, and g fluxes in the R, G, and B channels, respectively. The bottom colored curves show the J-PLUS filter transmission curves.