1999A&A...346..407G

We report on the first observation of the Seyfert 1 galaxy NGC 4593 in the 0.1-200keV band, performed with the BeppoSAX observatory. Its spectral components are for the first time simultaneously measured: a power-law with photon spectral index Γ≃1.9; the Compton-reflection of the primary power-law; a moderately broad (σ>60eV) K_α fluorescent line from neutral iron; and an absorption edge, whose threshold energy is consistent with K-shell photoionization from OVII. The amount of reflection and the iron line properties are consistent with both being produced in a plane-parallel, X-ray illuminated relativistic accretion disc surrounding the nuclear black hole, seen at an inclination of ≃30°. Any cutoff of the intrinsic continuum is constrained to lay above 150keV. The claim for a strongly variable soft excess is dismissed by our data and by a reanalysis of archival ASCA and ROSAT data.