NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-25 T19:12:17 PDT
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For refcode 2011MNRAS.417.1140F:
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NED Abstract

Copyright by Royal Astronomical Society. 2011MNRAS.417.1140F Studying the long-time variability of the Seyfert 2 galaxy NGC 4388 with INTEGRAL and Swift Fedorova, E. V.; Beckmann, V.; Neronov, A.; Soldi, S. Abstract. 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. Key words: X-rays: galaxies, galaxies: nuclei, galaxies: Seyfert
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