Surface-brightness profiles of NVSS J210626-314003 (top) and TXS 2353−003 (bottom) extracted from ISAAC H-band and Ks-band images, respectively. Red dots show the measured azimuthally averaged surface brightnesses as a function of R^{1 / 4}. Red lines show a Sérsic fit with n = 4, corresponding to the de Vaucouleurs law for classical elliptical galaxies, and convolved with the point spread function in each image. The dashed black lines show the size of the seeing disk. Dotted horizonal lines show the 3σ limiting surface brightness of our images. Excess flux at large radii compared to the R^{1 / 4} law is characteristic for brightest cluster galaxies in evolved galaxy clusters (e.g., Schombert 1987).