Dark Energy Survey Year 1 Results: Calibration of redMaGiC redshift distributions in DES and SDSS from cross-correlations
View / Open Files
Authors
Cawthon, R
Davis, C
Gatti, M
Vielzeuf, P
Elvin-Poole, J
Rozo, E
Frieman, J
Rykoff, ES
Alarcon, A
Bernstein, GM
Bonnett, C
Carnero Rosell, A
Castander, FJ
Chang, C
da Costa, LN
De Vicente, J
De Rose, J
Drlica-Wagner, A
Gaztanaga, E
Giannantonio, T
Gruen, D
Gschwend, J
Hartley, WG
Hoyle, B
Lin, H
Maia, MAG
Miquel, R
Ogando, RLC
Rau, MM
Roodman, A
Ross, AJ
Sevilla-Noarbe, I
Troxel, MA
Wechsler, RH
Abbott, TMC
Abdalla, FB
Allam, S
Annis, J
Avila, S
Bechtol, K
Bernstein, RA
Bertin, E
Brooks, D
Burke, DL
Carrasco Kind, M
Carretero, J
Cunha, CE
D'Andrea, CB
DePoy, DL
Desai, S
Diehl, HT
Doel, P
Eifler, TF
Evrard, AE
Flaugher, B
Fosalba, P
García-Bellido, J
Gerdes, DW
Gruendl, RA
Gutierrez, G
Hollowood, D
Honscheid, K
James, DJ
Jeltema, T
Krause, E
Kuehn, K
Kuhlmann, S
Kuropatkin, N
Lahav, O
Lima, M
Marshall, JL
Martini, P
Menanteau, F
Miller, CJ
Plazas, AA
Sanchez, E
Scarpine, V
Schindler, R
Schubnell, M
Sheldon, E
Smith, M
Smith, RC
Soares-Santos, M
Sobreira, F
Suchyta, E
Swanson, MEC
Tarle, G
Thomas, D
Tucker, DL
Walker, AR
Publication Date
2018-12Journal Title
Monthly Notices of the Royal Astronomical Society
ISSN
0035-8711
Publisher
Oxford University Press (OUP)
Volume
481
Issue
2
Pages
2427-2443
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Cawthon, R., Davis, C., Gatti, M., Vielzeuf, P., Elvin-Poole, J., Rozo, E., Frieman, J., et al. (2018). Dark Energy Survey Year 1 Results: Calibration of redMaGiC redshift distributions in DES and SDSS from cross-correlations. Monthly Notices of the Royal Astronomical Society, 481 (2), 2427-2443. https://doi.org/10.1093/MNRAS/STY2424
Abstract
We present calibrations of the redshift distributions of redMaGiC galaxies in
the Dark Energy Survey Year 1 (DES Y1) and Sloan Digital Sky Survey (SDSS) DR8
data. These results determine the priors of the redshift distribution of
redMaGiC galaxies, which were used for galaxy clustering measurements and as
lenses for galaxy-galaxy lensing measurements in DES Y1 cosmological analyses.
We empirically determine the bias in redMaGiC photometric redshift estimates
using angular cross-correlations with Baryon Oscillation Spectroscopic Survey
(BOSS) galaxies. For DES, we calibrate a single parameter redshift bias in
three photometric redshift bins: $z \in[0.15,0.3]$, [0.3,0.45], and [0.45,0.6].
Our best fit results in each bin give photometric redshift biases of $|\Delta
z|<0.01$. To further test the redMaGiC algorithm, we apply our calibration
procedure to SDSS redMaGiC galaxies, where the statistical precision of the
cross-correlation measurement is much higher due to a greater overlap with BOSS
galaxies. For SDSS, we also find best fit results of $|\Delta z|<0.01$. We
compare our results to other analyses of redMaGiC photometric redshifts.
Sponsorship
Science and Technology Facilities Council (ST/M005305/1)
Identifiers
External DOI: https://doi.org/10.1093/MNRAS/STY2424
This record's URL: https://www.repository.cam.ac.uk/handle/1810/289944
Rights
Licence:
http://www.rioxx.net/licenses/all-rights-reserved
Statistics
Total file downloads (since January 2020). For more information on metrics see the
IRUS guide.