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Dark Energy Survey Year 1 Results: The Photometric Data Set for Cosmology

Author(s): Drlica-Wagner, A; Sevilla-Noarbe, I; Rykoff, ES; Gruendl, RA; Yanny, B; et al

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Abstract: We describe the creation, content, and validation of the Dark Energy Survey (DES) internal year-one cosmology data set, Y1A1 GOLD, in support of upcoming cosmological analyses. The Y1A1 GOLD data set is assembled from multiple epochs of DES imaging and consists of calibrated photometric zero-points, object catalogs, and ancillary data products-e.g., maps of survey depth and observing conditions, star galaxy classification, and photometric redshift estimates that are necessary for accurate cosmological analyses. The Y1A1 GOLD wide area object catalog consists of similar to 137 million objects detected in co-added images covering similar to 1800 deg(2) in the DES grizY filters. The 10 sigma limiting magnitude for galaxies is g = 23.4, r = 23.2, i = 22.5, z = 21.8, and Y = 20.1. Photometric calibration of Y1A1 GOLD was performed by combining nightly zero-point solutions with stellar locus regression, and the absolute calibration accuracy is better than 2% over the survey area. DES Y1A1 GOLD is the largest photometric data set at the achieved depth to date, enabling precise measurements of cosmic acceleration at z less than or similar to 1.
Publication Date: Apr-2018
Electronic Publication Date: 3-Apr-2018
Citation: Drlica-Wagner, A, Sevilla-Noarbe, I, Rykoff, ES, Gruendl, RA, Yanny, B, Tucker, DL, Hoyle, B, Rosell, A Carnero, Bernstein, GM, Bechtol, K, Becker, MR, Benoit-Levy, A, Bertin, E, Kind, M Carrasco, Davis, C, de Vicente, J, Diehl, HT, Gruen, D, Hartley, WG, Leistedt, B, Li, TS, Marshall, JL, Neilsen, E, Rau, MM, Sheldon, E, Smith, J, Troxel, MA, Wyatt, S, Zhang, Y, Abbott, TMC, Abdalla, FB, Allam, S, Banerji, M, Brooks, D, Buckley-Geer, E, Burke, DL, Capozzi, D, Carretero, J, Cunha, E, D Andrea, CB, da Costa, LN, DePoy, DL, Desai, S, Dietrich, JP, Doel, P, Evrard, AE, Neto, A Fausti, Flaugher, B, Fosalba, P, Frieman, J, Garcia-Bellido, J, Gerdes, DW, Giannantonio, T, Gschwend, J, Gutierrez, G, Honscheid, K, James, DJ, Jeltema, T, Kuehn, K, Kuhlmann, S, Kuropatkin, N, Lahav, O, Lima, M, Lin, H, Maia, MAG, Martini, P, McMahon, RG, Melchior, P, Menanteau, F, Miquel, R, Nichol, RC, Ogando, RLC, Plazas, AA, Romer, AK, Roodman, A, Sanchez, E, Scarpine, V, Schindler, R, Schubnell, M, Smith, M, Smith, RC, Soares-Santos, M, Sobreira, F, Suchyta, E, Tarle, G, Vikram, V, Walker, AR, Wechsler, RH, Zuntz, J, Collaboration, DES. (2018). Dark Energy Survey Year 1 Results: The Photometric Data Set for Cosmology. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 235 (10.3847/1538-4365/aab4f5
DOI: doi:10.3847/1538-4365/aab4f5
ISSN: 0067-0049
EISSN: 1538-4365
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Type of Material: Journal Article
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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