Acknowledgements

The CFHTLS-SL2S is possible because of the dedication and hard work of many people and organizations. Our most heartfelt gratitude goes to:

• The CFHTLS-SL2S is based on the CFHT Legacy Survey obtained with MegaPrime/MegaCam, a joint project of CFHT and CEA/DAPNIA, at the Canada-France-Hawaii Telescope (CFHT) which is operated by the National Research Council (NRC) of Canada, the Institut National des Science de l'Univers of the Centre National de la Recherche Scientifique (CNRS) of France, and the University of Hawaii. This work is based in part on data products produced at TERAPIX and the Canadian Astronomy Data Centre as part of the Canada-France-Hawaii Telescope Legacy Survey, a collaborative project of NRC and CNRS.
• The CFHTLS-SL2S is partly funded from the Centre national des etudes spatiales, as part of the feasibility Study of the mission DUNE.