Spectra with real or false emission humps that seem to indicate cyclotron radiation from polars. The flux is F_λ in units of 10⁻¹⁷ erg s⁻¹ cm⁻² Å⁻¹. The best matches for the cyclotron harmonics m are marked by blue vertical lines. The estimated magnetic flux density B is given in the top right corner. The positions of the Balmer lines and of identified He lines are displayed by red vertical lines; the ⊕ symbols indicate telluric lines. The red asterisks mark the flux densities derived from the SDSS magnitudes and the open blue squares are the flux densities corresponding to the LS magnitudes in the griz bands. In the bottom panel (SDSS J144352.30+164503.3), the black spectrum is from DR16, whereas the cyan spectrum is the same spectrum from DR15 (i.e. an earlier version of the pipeline). The RGB images on the right are cutouts from the LS and have side lengths of 20 arcsec. The object in the image centre is the source of the spectrum.