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http://hdl.handle.net/20.500.12386/30274
Titolo: | High-energy monitoring of NGC 4593 with XMM-Newton and NuSTAR. X-ray spectral analysis | Autori: | Ursini, Francesco Petrucci, P. -O. Matt, G. BIANCHI, STEFANO CAPPI, MASSIMO De Marco, B. DE ROSA, ALESSANDRA Malzac, J. Marinucci, A. PONTI, GABRIELE TORTOSA, ALESSIA |
Data pubblicazione: | 2016 | Rivista: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Numero: | 463 | Fascicolo: | 1 | Da pagina:: | 382 | Abstract: | 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. | URI: | http://hdl.handle.net/20.500.12386/30274 | URL: | https://academic.oup.com/mnras/article/463/1/382/2589944 https://ui.adsabs.harvard.edu/link_gateway/2016MNRAS.463..382U/PUB_PDF http://arxiv.org/abs/1608.02847v1 |
ISSN: | 0035-8711 | DOI: | 10.1093/mnras/stw2022 | Bibcode ADS: | 2016MNRAS.463..382U | Fulltext: | open |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
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