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Article Contents
1 Introduction
2 Observation and data analysis
3 Comparison with Chandra source detections
4 IR properties of the XMM-Newton sources
5 X-ray detection of young bona fide brown dwarfs
6 X-ray properties of Young Stellar Objects in the $\rho $ Ophiuchi cloud
7 Summary and conclusions
References
Online Material
Appendix A: Method to compute the X-ray count rate upper limit
Appendix B: Comparison between Chandra and XMM-Newton determination of $N_{\rm H}$

List of tables
List of figures

Copyright ESO 2005
Published by EDP Sciences