Dark Energy Survey Year 3 Results: Deep Field Optical + Near-Infrared Images and Catalogue
Creators: name: Hartley, W. G.
name: Choi, A.
name: Amon, A.
name: Gruendl, R. A.
name: Sheldon, E.
name: Harrison, I.
name: Bernstein, G. M.
name: Sevilla-Noarbe, I.
name: Yanny, B.
name: Eckert, K.
name: Diehl, H. T.
name: Alarcon, A.
name: Banerji, M.
name: Bechtol, K.
name: Buchs, R.
name: Cantu, S.
name: Conselice, C.
name: Cordero, J.
name: Davis, C.
name: Davis, T. M.
name: Dodelson, S.
name: Drlica-Wagner, A.
name: Everett, S.
name: Ferté, A.
name: Gruen, D.
name: Honscheid, K.
name: Jarvis, M.
name: Johnson, M. D.
name: Kokron, N.
name: MacCrann, N.
name: Myles, J.
name: Pace, A. B.
name: Palmese, A.
name: Paz-Chinchón, F.
name: Pereira, M. E. S.
name: Plazas, A. A.
name: Prat, J.
name: Rodriguez-Monroy, M.
name: Rykoff, E. S.
name: Samuroff, S.
name: Sánchez, C.
name: Secco, L. F.
name: Tarsitano, F.
name: Tong, A.
name: Troxel, M. A.
name: Vasquez, Z.
name: Wang, K.
name: Zhou, C.
name: Abbott, T. M. C.
name: Aguena, M.
name: Allam, S.
name: Annis, J.
name: Bacon, D.
name: Bertin, E.
name: Bhargava, S.
name: Brooks, D.
name: Burke, D. L.
name: Rosell, A. Carnero
name: Kind, M. Carrasco
name: Carretero, J.
name: Castander, F. J.
name: Costanzi, M.
name: Crocce, M.
name: da Costa, L. N.
name: De Vicente, J.
name: DeRose, J.
name: Desai, S.
name: Dietrich, J. P.
name: Eifler, T. F.
name: Elvin-Poole, J.
name: Ferrero, I.
name: Flaugher, B.
name: Fosalba, P.
name: García-Bellido, J.
name: Gaztanaga, E.
name: Gerdes, D. W.
name: Gschwend, J.
name: Gutierrez, G.
name: Hinton, S. R.
name: Hollowood, D. L.
name: Huterer, D.
name: James, D. J.
name: Kent, S.
name: Krause, E.
name: Kuehn, K.
name: Kuropatkin, N.
name: Lahav, O.
name: Lin, H.
name: Maia, M. A. G.
name: March, M.
name: Marshall, J. L.
name: Martini, P.
name: Melchior, P.
name: Menanteau, F.
name: Miquel, R.
name: Mohr, J. J.
name: Morgan, R.
name: Neilsen, E.
name: Ogando, R. L. C.
name: Pandey, S.
name: Romer, A. K.
name: Roodman, A.
name: Sako, M.
name: Sanchez, E.
name: Scarpine, V.
name: Serrano, S.
name: Smith, M.
name: Soares-Santos, M.
name: Suchyta, E.
name: Swanson, M. E. C.
name: Tarle, G.
name: Thomas, D.
name: To, C.
name: Varga, T. N.
name: Walker, A. R.
name: Wester, W.
name: Wilkinson, R. D.
name: Zuntz, J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We describe the Dark Energy Survey (DES) Deep Fields, a set of images and associated multi-wavelength catalogue ($ugrizJHKs$) built from Dark Energy Camera (DECam) and Visible and Infrared Survey Telescope for Astronomy (VISTA) data. The DES Deep Fields comprise 11 fields (10 DES supernova fields plus COSMOS), with a total area of $\sim30~$ square degrees in $ugriz$ bands and reaching a maximum $i$-band depth of 26.75 (AB, $10σ$, 2 arcsec). We present a catalogue for the DES 3-year cosmology analysis of those four fields with full 8-band coverage, totalling $5.88~$ sq. deg. after masking. Numbering $2.8~$million objects ($1.6~$million post masking), our catalogue is drawn from images coadded to consistent depths of $r=25.7, i=25, z=24.3$ mag. We use a new model-fitting code, built upon established methods, to deblend sources and ensure consistent colours across the $u$-band to $Ks$-band wavelength range. We further detail the tight control we maintain over the point-spread function modelling required for the model fitting, astrometry and consistency of photometry between the four fields. The catalogue allows us to perform a careful star-galaxy separation and produces excellent photometric redshift performance (${\rm NMAD} = 0.023$ at $i&lt;23$). The Deep-Fields catalogue will be made available as part of the cosmology data products release, following the completion of the DES 3-year weak lensing and galaxy clustering cosmology work.
description: 32 pages, 23 figures, version accepted by MNRAS. See https://www.darkenergysurvey.org/des-year-3-cosmology-results-papers/ for the full DES Y3 cosmology release