Clustering-based redshift estimation: Application to VIPERS/CFHTLS
- Creators
- Scottez, V
- Mellier, Y.
- Granett, B. R.
- Moutard, T.
- Kilbinger, M.
- Scodeggio, M.
- Garilli, B.
- Bolzonella, M.
- de la Torre, S.
- Guzzo, L.
- Abbas, U.
- Adami, C.
- Arnouts, S.
- Bottini, D.
- BRANCHINI, ENZO FRANCO
- Cappi, A.
- Cucciati, O.
- Davidzon, I.
- Fritz, A.
- Franzetti, P.
- Iovino, A.
- Krywult, J.
- Le Brun, V.
- Le Fèvre, O.
- Maccagni, D.
- Malek, K.
- Marulli, F.
- Polletta, M.
- Pollo, A.
- Tasca, L. A. M.
- Tojeiro, R.
- Vergani, D.
- Zanichelli, A.
- Bel, J.
- Coupon, J.
- De Lucia, G.
- Ilbert, O.
- Mccracken, H. J.
- Moscardini, L.
- Others:
- Scottez, V
- Mellier, Y.
- Granett, B. R.
- Moutard, T.
- Kilbinger, M.
- Scodeggio, M.
- Garilli, B.
- Bolzonella, M.
- de la Torre, S.
- Guzzo, L.
- Abbas, U.
- Adami, C.
- Arnouts, S.
- Bottini, D.
- Branchini, ENZO FRANCO
- Cappi, A.
- Cucciati, O.
- Davidzon, I.
- Fritz, A.
- Franzetti, P.
- Iovino, A.
- Krywult, J.
- Le Brun, V.
- Le Fèvre, O.
- Maccagni, D.
- Malek, K.
- Marulli, F.
- Polletta, M.
- Pollo, A.
- Tasca, L. A. M.
- Tojeiro, R.
- Vergani, D.
- Zanichelli, A.
- Bel, J.
- Coupon, J.
- De Lucia, G.
- Ilbert, O.
- Mccracken, H. J.
- Moscardini, L.
Description
We explore the accuracy of the clustering-based redshift estimation proposed by Ménard et al. when applied to VIMOS Public Extragalactic Redshift Survey (VIPERS) and Canada- France-Hawaii Telescope Legacy Survey (CFHTLS) real data. This method enables us to reconstruct redshift distributions from measurement of the angular clustering of objects using a set of secure spectroscopic redshifts. We use state-of-the-art spectroscopic measurements with iAB < 22.5 from the VIPERS as reference population to infer the redshift distribution of galaxies from the CFHTLS T0007 release. VIPERS provides a nearly representative sample to a flux limit of iAB < 22.5 at a redshift of > 0.5 which allows us to test the accuracy of the clustering-based redshift distributions. We show that this method enables us to reproduce the true mean colour-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 reference and we give an estimate of the colour-redshift mapping in this case. This last point is of great interest for future large-redshift surveys which require a complete faint spectroscopic sample.
Additional details
- URL
- http://hdl.handle.net/11567/1071260
- URN
- urn:oai:iris.unige.it:11567/1071260
- Origin repository
- UNIGE