We explore the accuracy of the clustering-based redshift estimation proposed by M\'enard et al. (2013) when applied to VIPERS and CFHTLS real data. This method enables us to reconstruct redshift distributions from measurement of the angular clus- tering of objects using a set of secure spectroscopic redshifts. We use state of the art spectroscopic measurements with iAB < 22.5 from the VIMOS Public Extragalactic Redshift Survey (VIPERS) as reference population to infer the redshift distribution of galaxies from the Canada-France-Hawaii Telescope Legacy Survey (CFHTLS) T0007 release. VIPERS provides a nearly representative sample to the flux limit iAB < 22.5 at redshift > 0.5 which allows us to test the accuracy of the clustering-based red- shift distributions. We show that this method enables us to reproduce the true mean color-redshift relation when both populations have the same magnitude limit. We also show that this technique allows the inference of redshift distributions for a population fainter than the one of reference and we give an estimate of the color-redshift mapping in this case. This last point is of great interest for future large redshift surveys which suffer from the need of a complete faint spectroscopic sample.
Cite
@article{arxiv.1605.05501,
title = {Clustering-based redshift estimation: application to VIPERS/CFHTLS},
author = {V. Scottez and Y. Mellier and B. R. Granett and T. Moutard and M. Kilbinger and M. Scodeggio and B. Garilli and M. Bolzonella and S. de la Torre and L. Guzzo and U. Abbas and C. Adami and S. Arnouts and D. Bottini and E. Branchini and A. Cappi and O. Cucciati and I. Davidzon and A. Fritz and P. Franzetti and A. Iovino and J. Krywult and V. Le Brun and O. Le Fèvre and D. Maccagni and K. Małek and F. Marulli and M. Polletta and A. Pollo and L. A. . M. Tasca and R. Tojeiro and D. Vergani and A. Zanichelli and J. Bel and J. Coupon and G. De Lucia and O. Ilbert and H. J. McCracken and L. Moscardini},
journal= {arXiv preprint arXiv:1605.05501},
year = {2016}
}