Notes. Column 1: the radio and NIR source (components N) corresponding to the SDSS maxBCG cluster field: identification number is the sequential number (Koester et al. 2007). Column 2: NIR magnitude and error of the central components N, from GAIA sextractor aperture photometry (except for maxBCG 8495). Magnitudes are in the Vega system. Column 3: NIR flux and error of the central components N, from GAIA sextractor aperture photometry (except for maxBCG 8495). Column 4: FIRST radio “core” flux density estimated using funtools on circular regions of approximately the same size (~2 arcsec) and centered on the NIR emission regions N and the root mean square, as a measure of the noise, in the FIRST image. Column 5: FIRST total radio flux density estimated from sum of the integrated flux densities of all the FIRST components. Column 6: the logarithm and error of the NIR to radio “core” flux density. Column 7: the logarithm and error of the NIR to total radio flux density.