Examples of OTELO pseudo-spectra of [O III] sources (open circles). The best theoretical pseudo-spectrum obtained from the inverse deconvolution process described in Sect. 3.3 is represented by the green line. Panels a–c: pseudo-spectra with a bright (ID: 04338), a faint (ID: 07308), and a very faint (ID: 06178) continuum level, respectively. Panel d: pseudo-spectrum of a source (ID: 06872) with the [O III] λ5007 line truncated on the blue side of the survey spectral range. The pseudo-spectra in panels e and f – ID: 02250 and 03120 – correspond to the [O III] λ4959,5007 sources unseen in ancillary data and only detected by visual examination of the pseudo-spectra (see Sect. 5.3 for details).