Redshift distributions of galaxies in the Dark Energy Survey Science Verification shear catalogue and implications for weak lensing Academic Article uri icon

abstract

  • 2016 American Physical Society. We present photometric redshift estimates for galaxies used in the weak lensing analysis of the Dark Energy Survey Science Verification (DES SV) data. Four model- or machine learning-based photometric redshift methods - annz2, bpz calibrated against BCC-Ufig simulations, skynet, and tpz - are analyzed. For training, calibration, and testing of these methods, we construct a catalogue of spectroscopically confirmed galaxies matched against DES SV data. The performance of the methods is evaluated against the matched spectroscopic catalogue, focusing on metrics relevant for weak lensing analyses, with additional validation against COSMOS photo-z's. From the galaxies in the DES SV shear catalogue, which have mean redshift 0.720.01 over the range 0.3

published proceedings

  • Physical Review D

altmetric score

  • 1.85

author list (cited authors)

  • Bonnett, C., Troxel, M. A., Hartley, W., Amara, A., Leistedt, B., Becker, M. R., ... Walker, A. R.

citation count

  • 98

complete list of authors

  • Bonnett, C||Troxel, MA||Hartley, W||Amara, A||Leistedt, B||Becker, MR||Bernstein, GM||Bridle, SL||Bruderer, C||Busha, MT||Carrasco Kind, M||Childress, MJ||Castander, FJ||Chang, C||Crocce, M||Davis, TM||Eifler, TF||Frieman, J||Gangkofner, C||Gaztanaga, E||Glazebrook, K||Gruen, D||Kacprzak, T||King, A||Kwan, J||Lahav, O||Lewis, G||Lidman, C||Lin, H||MacCrann, N||Miquel, R||O’Neill, CR||Palmese, A||Peiris, HV||Refregier, A||Rozo, E||Rykoff, ES||Sadeh, I||Sánchez, C||Sheldon, E||Uddin, S||Wechsler, RH||Zuntz, J||Abbott, T||Abdalla, FB||Allam, S||Armstrong, R||Banerji, M||Bauer, AH||Benoit-Lévy, A||Bertin, E||Brooks, D||Buckley-Geer, E||Burke, DL||Capozzi, D||Carnero Rosell, A||Carretero, J||Cunha, CE||D’Andrea, CB||da Costa, LN||DePoy, DL||Desai, S||Diehl, HT||Dietrich, JP||Doel, P||Fausti Neto, A||Fernandez, E||Flaugher, B||Fosalba, P||Gerdes, DW||Gruendl, RA||Honscheid, K||Jain, B||James, DJ||Jarvis, M||Kim, AG||Kuehn, K||Kuropatkin, N||Li, TS||Lima, M||Maia, MAG||March, M||Marshall, JL||Martini, P||Melchior, P||Miller, CJ||Neilsen, E||Nichol, RC||Nord, B||Ogando, R||Plazas, AA||Reil, K||Romer, AK||Roodman, A||Sako, M||Sanchez, E||Santiago, B||Smith, RC||Soares-Santos, M||Sobreira, F||Suchyta, E||Swanson, MEC||Tarle, G||Thaler, J||Thomas, D||Vikram, V||Walker, AR

publication date

  • August 2016