Ursini, FrancescoFrancescoUrsiniPetrucci, P. -O.P. -O.PetrucciMatt, G.G.MattBIANCHI, STEFANOSTEFANOBIANCHICAPPI, MASSIMOMASSIMOCAPPIDe Marco, B.B.De MarcoDE ROSA, ALESSANDRAALESSANDRADE ROSAMalzac, J.J.MalzacMarinucci, A.A.MarinucciPONTI, GABRIELEGABRIELEPONTITORTOSA, ALESSIAALESSIATORTOSA2021-02-102021-02-1020160035-8711http://hdl.handle.net/20.500.12386/30274We present results from a joint XMM-Newton/NuSTAR monitoring of the Seyfert 1 NGC 4593, consisting of 5 × 20 ks simultaneous observations spaced by 2 d, performed in 2015 January. The source is variable, both in flux and spectral shape, on time-scales down to a few ks and with a clear softer-when-brighter behaviour. In agreement with past observations, we find the presence of a warm absorber well described by a two-phase ionized outflow. The source exhibits a cold, narrow and constant Fe Kα line at 6.4 keV, and a broad component is also detected. The broad-band (0.3-79 keV) spectrum is well described by a primary power law with Γ ≃ 1.6-1.8 and an exponential cut-off varying from 90^{+ 40}_{- 20} to >700 keV, two distinct reflection components, and a variable soft excess correlated with the primary power law. This campaign shows that probing the variability of Seyfert 1 galaxies on different time-scales is of prime importance to investigate the high-energy emission of active galactic nuclei.STAMPAenArticle10.1093/mnras/stw20222-s2.0-85016014308000386464900028https://academic.oup.com/mnras/article/463/1/382/2589944https://ui.adsabs.harvard.edu/link_gateway/2016MNRAS.463..382U/PUB_PDFhttp://arxiv.org/abs/1608.02847v12016MNRAS.463..382UFIS/05 - ASTRONOMIA E ASTROFISICA