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High-energy monitoring of NGC 4593 with XMM-Newton and NuSTAR. X-ray spectral analysis

Ursini, F. and Petrucci, P.-O. and Matt, G. and Bianchi, S. and Cappi, M. and De Marco, B. and De Rosa, A. and Malzac, J. and Marinucci, A. and Ponti, G. and Tortosa, A. (2016) High-energy monitoring of NGC 4593 with XMM-Newton and NuSTAR. X-ray spectral analysis. Monthly Notices of the Royal Astronomical Society, 463 (1). pp. 382-392. ISSN 0035-8711. doi:10.1093/mnras/stw2022.

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We 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.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Matt, G.0000-0002-2152-0916
Bianchi, S.0000-0002-4622-4240
De Rosa, A.0000-0001-5668-6863
Ponti, G.0000-0003-0293-3608
Additional Information:© 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2016 August 9. Received 2016 August 9; in original form 2016 July 4. Published: 12 August 2016. We thank the anonymous referee for helpful comments and suggestions that improved the paper. This work is based on observations obtained with: the NuSTAR mission, a project led by the California Institute of Technology, managed by the Jet Propulsion Laboratory and funded by NASA; XMM–Newton, an ESA science mission with instruments and contributions directly funded by ESA Member States and the USA (NASA). This research has made use of data, software and/or web tools obtained from NASA's High Energy Astrophysics Science Archive Research Center (HEASARC), a service of Goddard Space Flight Center and the Smithsonian Astrophysical Observatory. FU, P-OP, GM, SB, MC, ADR and JM acknowledge support from the French–Italian International Project of Scientific Collaboration: PICS-INAF project number 181542. FU and P-OP acknowledge support from CNES. FU acknowledges support from Université Franco-Italienne (Vinci PhD fellowship). FU and GM acknowledge financial support from the Italian Space Agency under grant ASI/INAF I/037/12/0-011/13. P-OP acknowledges financial support from the Programme National Hautes Energies. SB, MC and ADR acknowledge financial support from the Italian Space Agency under grant ASI-INAF I/037/12/P1. GP acknowledges support by the Bundesministerium für Wirtschaft und Technologie/Deutsches Zentrum für Luft und Raumfahrt (BMWI/DLR, FKZ 50 OR 1408) and the Max Planck Society.
Subject Keywords:galaxies: active – galaxies: Seyfert –X-rays: galaxies –X-rays: individual: NGC 4593
Issue or Number:1
Record Number:CaltechAUTHORS:20160816-122629700
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Official Citation:F. Ursini, P.-O. Petrucci, G. Matt, S. Bianchi, M. Cappi, B. De Marco, A. De Rosa, J. Malzac, A. Marinucci, G. Ponti, A. Tortosa; High-energy monitoring of NGC 4593 with XMM–Newton and NuSTAR. X-ray spectral analysis, Monthly Notices of the Royal Astronomical Society, Volume 463, Issue 1, 21 November 2016, Pages 382–392,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:69671
Deposited By: Joy Painter
Deposited On:16 Aug 2016 20:51
Last Modified:11 Nov 2021 04:18

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