Observed SED of G13 (black squares) based on corrected aperture magnitudes from Pan-STARRS rzy, UKIDSS JHK, and the four Spitzer IRAC bands corrected for Galactic interstellar extinction with E(B − V) = 2. The formal error bars for the photometric uncertainties are smaller than the symbol size. For comparison, the redshifted template spectrum of a 13 Gyr old E galaxy from Polletta et al. (2007) is overplotted for z = 0.0 − 0.90 in steps of 0.15 (colors).