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

被引：3

作者：

Ursini, F. ^{[1
,2
,3
]}

Petrucci, P. -O. ^{[1
,2
]}

Matt, G. ^{[3
]}

Bianchi, S. ^{[3
]}

Cappi, M. ^{[4
]}

De Marco, B. ^{[5
]}

De Rosa, A. ^{[6
]}

Malzac, J. ^{[7
,8
]}

Ponti, G. ^{[5
]}

机构：

[1] Univ Grenoble Alpes, IPAG, F-38000 Grenoble, France

[2] CNRS, IPAG, F-38000 Grenoble, France

[3] Univ Rome Tre, Dipartimento Matemat & Fis, Via Vasca Navale 84, I-00146 Rome, Italy

[4] INAF IASF Bologna, Via Gobetti 101, I-40129 Bologna, Italy

[5] Max Planck Inst Extraterr Phys, Giessenbachstr, D-85748 Garching, Germany

[6] INAF Ist Astrofis & Planetol Spaziali, Via Fosso del Cavaliere, I-00133 Rome, Italy

[7] Univ Toulouse, UPS OMP, IRAP, Toulouse, France

[8] CNRS, IRAP, 9 Av Colonel Roche,BP44346, F-31028 Toulouse 4, France

来源：

ASTRONOMISCHE NACHRICHTEN | 2016年 / 337卷 / 4-5期

关键词：

accretion; accretion disks; galaxies: active; galaxies: Seyfert; X-rays: galaxies; X-rays: individuals (NGC 4593); ACTIVE GALACTIC NUCLEI; X-RAY; XMM-NEWTON; SPECTRAL-ANALYSIS; BLACK-HOLE; MULTIWAVELENGTH CAMPAIGN; TERM VARIABILITY; AGN; NUSTAR; SPECTROSCOPY;

D O I：

10.1002/asna.201612346

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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. (C) 2016 WILEY-VCH Verlag GmbH&Co. KGaA, Weinheim

引用

页码：552 / 556

页数：5

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