XMM-Newton – NuSTAR monitoring campaign of the Seyfert 1 galaxy IC 4329A

Abstract

We present the results of a joint and campaign on the active galactic nucleus (AGN) IC 4329A, consisting of 9 times 20\,ks observations, and 5 times 20\,ks observations within nine days, performed in August 2021. Within each observation, the AGN is not very variable, and the fractional variability never exceeds 5<!PCT!>. Flux variations are observed between the different observations on timescales of days, with a ratio of 30<!PCT!> of the minimum and maximum 2--10\,keV flux. These variations follow the softer-when-brighter behavior typically observed in AGN. In all observations, a soft excess is clearly present. Consistently with previous observations, the X-ray spectra of the source exhibit a cutoff energy between 140 and 250\,keV that is constant within the error in the different observations. We detected a prominent component of the $6.4$\,keV Fe Kalpha line consistent with being constant during the monitoring, consisting of an unresolved narrow core and a broader component likely originating in the inner accredion disk. We find that the reflection component is weak max and most likely originates in distant neutral medium. We also found a warm absorber component together with an ultrafast outflow. Their energetics show that these outflows have enough mechanical power for significant feedback on the environment of the AGN.