Hostname: page-component-76fb5796d-qxdb6 Total loading time: 0 Render date: 2024-04-29T05:53:32.140Z Has data issue: false hasContentIssue false
  • English
  • Français

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

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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

1. McHardy, I.M. 1989, in “Two Topics in X-ray Astronomy”, Proc. 23rd ESLAB Symp., Italy, p. 1111 Google Scholar
2. Edelson, R.A. and Krolik, J.H. 1988, ApJ, 333, 646 Google Scholar
3. Belloni, T. and Hasinger, G. 1990, A&A, 227, L33 Google Scholar