SDSS spectrum of EV UMa showing cyclotron harmonics. The upper panel shows the original spectrum (solid line) and a low-order polynomial fit to the continuum (dashed line). Flux units are 10⁻¹⁷ erg cm⁻² s⁻¹. The lower panel shows the difference spectrum between the original and the continuum fit, together with an arbitrarily scaled 5 keV cyclotron model. The model was shifted by ten flux units.