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Long Term X-ray Variability of NGC 4151

Published online by Cambridge University Press:  19 July 2016

I. E. Papadakis  and
I. M. McHardy
I. E. Papadakis
Affiliation:
Physics Department, Southampton University, University Road, Southampton, SO2 5NH, UK
I. M. McHardy
Affiliation:
Physics Department, Southampton University, University Road, Southampton, SO2 5NH, UK

Extract

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Short time scale X-ray power spectra of AGN are in general well fitted by a power law with slopes between −1 and −2 but we expect these slopes to flatten at low frequencies (indication of such a flattening has already been seen in NGC 5506). We have searched for such a low-frequency break in the power spectrum of NGC 4151 by investigating its long term X-ray light curve (2–10 keV). To construct this light curve we used Ariel V SSI, OSO-8, HEAO-1, Ariel VI, EXOSAT ME and GINGA LAC data.

Type
Poster Contributions: Variability
Information
Symposium - International Astronomical Union , Volume 159: Multi-Wavelength Continuum Emission of AGN , 1994 , pp. 402
Copyright
Copyright © Kluwer 1994 

References

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3. Belloni, T. and Hasinger, G. 1990, A&A, 227, L33 Google Scholar