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

¹ INAF – Astronomical Observatory of Rome, Via Frascati 33, 00040 Monte Porzio Catone, Italy
e-mail: alessia.tortosa@inaf.it
² Instituto de Estudios Astrofísicos, Facultad de Ingeniería y Ciencias, Universidad Diego Portales, Av. Ejército Libertador 441, Santiago, Chile
³ Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, PR China
⁴ George Mason University, Department of Physics & Astronomy, MS 3F3, 4400 University Drive, Fairfax, VA 22030, USA
⁵ Physics Department, Tor Vergata University of Rome, Via della Ricerca Scientifica 1, 00133 Rome, Italy
⁶ INFN – Rome Tor Vergata, Via della Ricerca Scientifica 1, 00133 Rome, Italy
⁷ Department of Astronomy, University of Maryland, College Park, MD 20742, USA
⁸ NASA Goddard Space Flight Center, Code 662, Greenbelt, MD 20771, USA
⁹ RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
¹⁰ MIT Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
¹¹ INAF – Istituto di Astrofisica e Planetologia Spaziali, Via del Fosso del Cavaliere 100, 00133 Roma, Italy
¹² Yale Center for Astronomy & Astrophysics, 52 Hillhouse Avenue, New Haven, CT 06511, USA
¹³ Joint ALMA Observatory, Avenida Alonso de Cordova 3107, Vitacura, 7630355 Santiago, Chile
¹⁴ Eureka Scientific, 2452 Delmer Street Suite 100, Oakland, CA 94602-3017, USA
¹⁵ Space Science Institute, 4750 Walnut Street, Suite 205, Boulder, CO 80301, USA
¹⁶ Department of Physics and Astronomy, West Virginia University, PO Box 6315 Morgantown, WV 26506, USA
¹⁷ Department of Astronomy, University of Maryland, College Park, MD 20742, USA
¹⁸ Department of Astronomy, University of Geneva, 1205 Versoix, Switzerland
¹⁹ National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903, USA
²⁰ Department of Astronomy, University of Florida, PO Box 112055 Gainesville FL 32611, USA
²¹ Department of Astronomy, University of Virginia, 530 McCormick Road, Charlottesville, VA 22904, USA
²² School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel

Received: 28 November 2023
Accepted: 10 April 2024

Abstract

We present the results of a joint XMM-Newton and NuSTAR campaign on the active galactic nucleus (AGN) IC 4329A, consisting of 9 × 20 ks XMM-Newton observations, and 5 × 20 ks NuSTAR observations within nine days, performed in August 2021. Within each observation, the AGN is not very variable, and the fractional variability never exceeds 5%. Flux variations are observed between the different observations on timescales of days, with a ratio of 30% 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 Kα 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 (R_max = 0.009 ± 0.002) 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.