Ursini, FrancescoFrancescoUrsiniPetrucci, P. -O.P. -O.PetrucciMatt, G.G.MattBIANCHI, STEFANOSTEFANOBIANCHICAPPI, MASSIMOMASSIMOCAPPIDe Marco, B.B.De MarcoDE ROSA, ALESSANDRAALESSANDRADE ROSAMalzac, J.J.MalzacPONTI, GABRIELEGABRIELEPONTI2021-02-222021-02-2220160004-6337http://hdl.handle.net/20.500.12386/30520We discuss preliminary results from a joint XMM-Newton and NuSTAR monitoring program on the active galactic nucleus NGC 4593, consisting of 5 × 20 ks observations, spaced by two days, performed in January 2015. The source is found to be variable, both in flux and spectral shape, on time scales as short as a few ks. The spectrum clearly softens when the source brightens. A simple timing analysis suggests the presence of a variable soft excess that correlates with the primary continuum.STAMPAenArticle10.1002/asna.2016123462-s2.0-84964776904000375725600036http://arxiv.org/abs/1510.01966v1https://onlinelibrary.wiley.com/doi/abs/10.1002/asna.2016123462016AN....337..552UFIS/05 - ASTRONOMIA E ASTROFISICA