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Article Contents
1 Introduction
2 Construction of the Fe II sample
3 Velocity shifts between individual exposures
4 The single ion differential $\alpha $ measurement
5 Analysis and the $\Delta \alpha /\alpha $ results
6 The fundamental noise limitation in the $\Delta \alpha /\alpha $ measurement
7 Discussion and outlook
8 Conclusions

List of tables
List of figures

Copyright ESO 2005
Published by EDP Sciences