| HAL : hal-00656096, version 1 |
| Code Bibliographique ADS : 2011MNRAS.417.1140F |
| DOI : 10.1111/J.1365-2966.2011.19335.X |
| Fiche détaillée | Récupérer au format |
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| Monthly Notices of the Royal Astronomical Society 417 (2011) 1140-1147 |
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| Studying the long-time variability of the Seyfert 2 galaxy NGC 4388 with INTEGRAL and Swift |
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| E. V. FedorovaV. Beckmann 1 |
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| (10/2011) |
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| We present analysis results on the Seyfert 2 galaxy NGC 4388 based on 6 yr of INTEGRAL data combined with Swift/Burst Alert Telescope survey and Swift/X-Ray Telescope pointed observations. These data, taken from 2003 to 2009, allow us to study the broad-band properties of this active galactic nucleus in the 0.3-300 keV energy range. The continuum emission of NGC 4388 is well represented by an absorbed power-law model with exponential cut-off at high energies and an upper limit on the reflection component of R < 0.5. We find slow strong variations of the hard X-ray emission, indicating both flux and spectral slope changes on the 3-6 months time-scale. In comparison with previous results on NGC 4388, the source shows a complex variability behaviour, i.e. the spectral shape and the 20-60 keV flux vary independently. |
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| 1 : | AstroParticule et Cosmologie (APC) |
| CNRS : UMR7164 – IN2P3 – Observatoire de Paris – Université Paris VII - Paris Diderot – CEA : DSM/IRFU | |
| 2 : | Institut de Recherches sur les lois Fondamentales de l'Univers (ex DAPNIA) (IRFU) |
| CEA : DSM/IRFU | |
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| APC - AHE |
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| Domaine | : | Physique/Astrophysique/Phénomènes cosmiques de haute energie Planète et Univers/Astrophysique/Phénomènes cosmiques de haute energie |
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| X-rays: galaxies – galaxies: nuclei – galaxies: Seyfert |
| hal-00656096, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00656096 | |
| oai:hal.archives-ouvertes.fr:hal-00656096 | |
| Contributeur : Volker Beckmann | |
| Soumis le : Mardi 3 Janvier 2012, 15:34:24 | |
| Dernière modification le : Jeudi 28 Juin 2012, 13:34:17 | |