Magnetic energy spectra for the vertical (solid line) and total (dotted line) flux densities. The solid line is the same as the lowest curve in Fig. 1. The dotted curve agrees with the solid one except at the largest wave numbers, but the deviation there is most likely due to noise (as the transverse Zeeman effect that is used to derive the total flux densities introduces non-Gaussian noise that is much larger than the σ_obs for the vertical flux densities).