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- Title
High-energy monitoring of Seyfert galaxies: The case of NGC 4593.
- Authors
Ursini, F.; Petrucci, P.-O.; Matt, G.; Bianchi, S.; Cappi, M.; De Marco, B.; De Rosa, A.; Malzac, J.; Ponti, G.
- Abstract
We discuss preliminary results from a joint XMM- Newton and NuSTAR monitoring program on the active galactic nucleus NGC 4593, consisting of 5×20 ks observations, spaced by two days, performed in January 2015. The source is found to be variable, both in flux and spectral shape, on time scales as short as a few ks. The spectrum clearly softens when the source brightens. A simple timing analysis suggests the presence of a variable soft excess that correlates with the primary continuum. (© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
- Subjects
SEYFERT galaxies; FLUX (Energy); GALACTIC nuclei; ACCRETION (Astrophysics); X-ray astronomy; SUPERMASSIVE black holes
- Publication
Astronomische Nachrichten, 2016, Vol 337, Issue 4/5, p552
- ISSN
0004-6337
- Publication type
Article
- DOI
10.1002/asna.201612346