Middei, R.R.MiddeiBIANCHI, STEFANOSTEFANOBIANCHIPetrucci, P. -O.P. -O.PetrucciUrsini, FrancescoFrancescoUrsiniCAPPI, MASSIMOMASSIMOCAPPIDe Marco, B.B.De MarcoDE ROSA, ALESSANDRAALESSANDRADE ROSAMalzac, J.J.MalzacMarinucci, A.A.MarinucciMatt, G.G.MattPONTI, GABRIELEGABRIELEPONTITORTOSA, ALESSIAALESSIATORTOSA2021-02-222021-02-2220190035-8711http://hdl.handle.net/20.500.12386/30514It is widely believed that the primary X-ray emission of AGN is due to the Comptonization of optical-UV photons from a hot electron corona, while the origin of the `soft-excess' is still uncertain and matter of debate. A second Comptonization component, called warm corona, was therefore proposed to account for the soft-excess, and found in agreement with the optical-UV to X-ray emission of a sample of Seyfert galaxies. In this context, we exploit the broad-band XMM-Newton and NuSTAR simultaneous observations of the Seyfert galaxy NGC 4593 to further test the so-called `two corona model'. The NGC 4593 spectra are well reproduced by the model, from the optical/UV to the hard X-rays. Moreover, the data reveal a significant correlation between the hot and the warm corona parameters during our monitoring campaign.STAMPAenArticle10.1093/mnras/sty33792-s2.0-85062294899000462281900030https://academic.oup.com/mnras/article/483/4/4695/5245186?login=truehttp://arxiv.org/abs/1812.03180v12019MNRAS.483.4695MFIS/05 - ASTRONOMIA E ASTROFISICA