field containing both the radio source 24P73 and the central part of the galaxy concentration with the brightest galaxies, G2, G6, G13, and G16. Galaxies are indicated by their blue color. The inverted grayscale background image is the stack of the J-, H-, and K-band images from UGPS. The red curves are the contour lines of the GMRT 610 MHz radio map (lowest level at 3σ, all others in steps of 5σ with σ = 55 μJy). Dashed black ellipses mark the five radio components, labeled with Roman numerals. The luminosity-weighted center of the projected galaxy distribution, excluding G2, is indicated by the blue x symbol.