The Compton-Getting dipole amplification, (3 − α_ν) shown for various wavelength data marked on the horizontal axis. For high-energy data the upper horizontal axis marks the corresponding energy, E. From left to right: dashes mark the amplification for the Fermi-LAT data, dashed-dotted line for the HEAO X-ray data, solid line for the mid- and near-IR data, dashed-triple-dotted line for the near-IR IGL at m₀ ≥ 18 and the dotted line shows the amplification the far-IR CIB determined from FIRAS. See text for details. The range of wavelengths covered by each line is marked with shadow rectangles. Euclid is marked in red being the subject here.