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Article Contents
1 Introduction
2 X-ray observations and spectral analysis
3 Variability of the absorption structure at $\sim $7.7 keV-8 keV
4 Photoionization modeling of the X-ray spectrum of APM 08279+5255
5 Line Identification
6 Discussion and summary

List of tables
List of figures

Copyright ESO 2008
Published by EDP Sciences