Based on observations obtained with ESO VLT (program 074.A-0533) and MegaPrime/MegaCam, a joint project of Canada France Hawaii Telescope (CFHT) and CEA/DAPNIA, at the Canada-France-Hawaii Telescope (program 03BF12), which is operated by the National Research Council (NRC) of Canada, the Institut National des Sciences de l'Univers of the Centre National de la Recherche Scientifique (CNRS) of France, and the University of Hawaii.

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All the spectral and imaging data used in this paper are available through the VO-Paris Data Centre: http://voplus.obspm.fr/DataCollections/Abell0496/

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...

Appendices are only available in electronic form at http://www.aanda.org

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... HyperLeda

http://leda.univ-lyon1.fr/

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... Coma

http://cencosw.oamp.fr/

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