Alba galaxy (PGC 3087775) and its major merger remnants. The main panel shows surface brightness image of the Alba galaxy that is produced by co-adding all 57 J-PAS bands (including 54 narrowband filters, two medium-band filters, and one broadband filter; however, only the 56 narrow and medium-band filters are used in the analysis presented in this paper). The co-add reaches a 3σ mSBL over 100 arcsec² of 29 mag/arcsec². The color bar represents the surface brightness of the co-added image. The hexagon over the center of the galaxy delineates the MaNGA footprint used to validate J-PAS SEDs in Fig. 2. The six polygons delineated with the thin lines, are named and studied independently in subsequent figures (with the same color-coding). The lower left panel displays a false-color image from the HSC-SSP (Subaru) wide survey, created using the z, r, and g filters as the red, green, and blue. Polygon coordinates are on Zenodo (see Appendix E.1).