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

Journal Article · Tue Apr 03 00:00:00 EDT 2018 · The Astrophysical Journal. Supplement Series (Online)

DOI:https://doi.org/10.3847/1538-4365/aab4f5· OSTI ID:1436085

Drlica-Wagner, A. ; Sevilla-Noarbe, I.; Rykoff, E. S. ; Gruendl, R. A. ; Yanny, B. ; Tucker, D. L.; Hoyle, B.; Rosell, A. Carnero; Bernstein, G. M.; Bechtol, K.; Becker, M. R.; Benoit-Lévy, A.; Bertin, E.; Kind, M. Carrasco; Davis, C.; Vicente, J. de; Diehl, H. T.; Gruen, D. ; Hartley, W. G.; Leistedt, B. ; Li, T. S.; Marshall, J. L. ; Neilsen, E.; Rau, M. M.; Sheldon, E.; Smith, J.; Troxel, M. A.; Wyatt, S.; Zhang, Y.; Abbott, T. M. C.; Abdalla, F. B.; Allam, S.; Banerji, M.; Brooks, D. ; Buckley-Geer, E.; Burke, D. L. ; Capozzi, D.; Carretero, J.; Cunha, C. E.; D’Andrea, C. B.; Costa, L. N. da; DePoy, D. L.; Desai, S.; Dietrich, J. P.; Doel, P.; Evrard, A. E.; Neto, A. Fausti; Flaugher, B.; Fosalba, P.; Frieman, J.; García-Bellido, J. ; Gerdes, D. W. ; Giannantonio, T.; Gschwend, J.; Gutierrez, G.; Honscheid, K.; James, D. J.; Jeltema, T.; Kuehn, K. ; Kuhlmann, S.; Kuropatkin, N.; Lahav, O.; Lima, M.; Lin, H.; Maia, M. A. G.; Martini, P.; McMahon, R. G. ; Melchior, P. ; Menanteau, F.; Miquel, R. ; Nichol, R. C.; Ogando, R. L. C.; Plazas, A. A.; Romer, A. K. ; Roodman, A. ; Sanchez, E. ; Scarpine, V.; Schindler, R.; Schubnell, M.; Smith, M. ; Smith, R. C.; Soares-Santos, M. ; Sobreira, F.; Suchyta, E.; Tarle, G. ; Vikram, V.; Walker, A. R. ; Wechsler, R. H. ; Zuntz, J.

In this paper, 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 $$\sim 137$$ million objects detected in co-added images covering $$\sim 1800\,{\deg }^{2}$$ in the DES grizY filters. The 10σ 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. Finally, DES Y1A1 GOLD is the largest photometric data set at the achieved depth to date, enabling precise measurements of cosmic acceleration at z ≲ 1.

• Research Organization: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Contributing Organization: DES Collaboration
• Grant/Contract Number: AC02-76SF00515; AC05-00OR22725; AC02-07CH11359; SC0012704
• OSTI ID: 1436085
• Alternate ID(s): OSTI ID: 1389251; OSTI ID: 1435205; OSTI ID: 1437985
• Report Number(s): BNL-114276-2017-JA; FERMILAB-PUB-17-180-AE; arXiv:1708.01531; TRN: US1900130
• Journal Information: The Astrophysical Journal. Supplement Series (Online), Vol. 235, Issue 2; ISSN 1538-4365
• Publisher: American Astronomical Society/IOP
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
image processing
photometric
surveys
cosmology observations
catalogs
techniques: image processing
techniques: photometric
cosmology: observations
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY