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NGC 2617 is a nearby ($z\sim 0.01$) active galaxy that recently switched frombeing a Seyfert 1.8 to be a Seyfert 1.0. At the same time, it underwent astrong increase of X-ray flux by one order of magnitude with respect toarchival measurements. We characterise the X-ray spectral and timing propertiesof NGC 2617 with the aim of studying the physics of a changing-look activegalactic nucleus (AGN). We performed a comprehensive timing and spectralanalysis of two XMM-Newton pointed observations spaced by one month,complemented by archival quasi-simultaneous INTEGRAL observations. We foundthat, to the first order, NGC 2617 looks like a type 1 AGN in the X-ray bandand, with the addition of a modest reflection component, its continuum can bemodelled well either with a power law plus a phenomenological blackbody, apartially covered power law, or a double Comptonisation model. Independent ofthe continuum adopted, in all three cases a column density of a few $10^{23}$cm$^{-2}$ of neutral gas covering 20-40\% of the continuum source is requiredby the data. Most interestingly, absorption structures due to highly ionisediron have been detected in both observations with a redshift of about $0.1c$with respect to the systemic redshift of the host galaxy. The redshiftedabsorber can be ascribed to a failed wind/aborted jets component, togravitational redshift effects, and/or to matter directly falling towards thecentral supermassive black hole. In either case, we are probing the innermostaccretion flow around the central supermassive black hole of NGC 2617 and mightbe even watching matter in a direct inflow towards the black hole itself.

Direct probe of the inner accretion flow around the supermassive black hole in NGC 2617