Principal Component Analysis of the CIV λ1549 Emission-Line in Active Galactic Nuclei

  • M. Türler
  • T. J.-L. Courvoisier
Conference paper
Part of the Astrophysics and Space Science Library book series (ASSL, volume 218)


We apply a principal component analysis (PCA) to the CIV λ1549 emission-line of 18 active galactic nuclei (AGN) observed more than 15 times with the IUE satellite from 1978 to 1991. The PCA method is described and some qualitative results are discussed. A more quantitative study is in preparation (Türler & Courvoisier 1997).


Principal Component Analysis Active Galactic Nucleus Principal Component Analysis Method Line Part Broad Line Region 
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Copyright information

© Springer Science+Business Media Dordrecht 1997

Authors and Affiliations

  • M. Türler
    • 1
    • 2
  • T. J.-L. Courvoisier
    • 1
    • 2
  1. 1.Geneva ObservatorySauvernySwitzerland
  2. 2.INTEGRAL Science Data CentreVersoixSwitzerland

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