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High-energy monitoring of Seyfert galaxies: the case of NGC 4593

We discuss preliminary results from a joint XMM-Newton and NuSTAR monitoring program on the active galactic nucleus NGC 4593, consisting of 5x20 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.

preprint2015arXivOpen access
F. UrsiniP. -O. PetrucciG. MattS. BianchiM. CappiB. De MarcoA. De RosaJ. MalzacG. Ponti
astro-ph.HE
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Open access9 authors1 topic
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F. UrsiniP. -O. PetrucciG. MattS. BianchiM. CappiB. De MarcoA. De RosaJ. MalzacG. Ponti

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