Optical/UV (OM) and X-ray (RGS and EPIC-pn) data of NGC 5548 from unobscured (2000, 2001) and obscured (2013) epochs. The optical/UV data have been corrected for the effects described in Sects. 4.1–4.5. The X-ray spectra have been corrected for Galactic absorption (Sect. 4.6), but not for absorption by the obscurer and the warm absorber. The displayed X-ray data between 0.3–1.4 are RGS and at higher energies EPIC-pn. The X-ray spectra have been binned for clarity of presentation. In the 2013 data, the soft X-ray spectrum is the lowest one and the optical/UV data the highest one.