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Abbott, T. M. C.; Allam, S.; Andersen, P.; Angus, C.; Asorey, J.; Avelino, A.; Avila, S.; Bassett, B. A.; Bechtol, K.; Bernstein, G. M.; Bertin, E.; Brooks, D.; Brout, D.; Brown, P.; Burke, D. L.; Calcino, J.; Carnero Rosell, A.; Carollo, D.; Kind, M. Carrasco; Carretero, J.; Casas, R.; Castander, F. J.; Cawthon, R.; Challis, P.; Childress, M.; Clocchiatti, A.; Cunha, C. E.; D'Andrea, C. B.; da Costa, L. N.; Davis, C.; Davis, T. M.; De Vicente, J.; DePoy, D. L.; Desai, S.; Diehl, H. T.; Doel, P.; Drlica-Wagner, A.; Eifler, T. F.; Evrard, A. E.; Fernandez, E.; Filippenko, A.; Finley, D. A.; Flaugher, B.; Foley, R. J.; Fosalba, P.; Frieman, J.; Galbany, L.; Garcia-Bellido, J.; Gaztanaga, E.; Giannantonio, T.; Glazebrook, K.; Goldstein, D. A.; Gonzalez-Gaitan, S.; Grün, D.; Gründl, R. A.; Gschwend, J.; Gupta, R. R.; Gutierrez, G.; Hartley, W. G.; Hinton, S. R.; Hollowood, D. L.; Honscheid, K.; Hoormann, J. K.; Hoyle, B.; James, D. J.; Jeltema, T.; Johnson, M. W. G.; Johnson, M. D.; Kasai, E.; Kent, S.; Kessler, R.; Kim, A. G.; Kirshner, R. P.; Kovacs, E.; Krause, E.; Kron, R.; Kühn, K.; Kuhlmann, S.; Kuropatkin, N.; Lahav, O.; Lasker, J.; Lewis, G. F.; Li, T. S.; Lidman, C.; Lima, M.; Lin, H.; Macaulay, E.; Maia, M. A. G.; Mandel, K. S.; March, M.; Marriner, J.; Marshall, J. L.; Martini, P.; Menanteau, F.; Miller, C. J.; Miquel, R.; Miranda, V; Mohr, J. J.; Morganson, E.; Muthukrishna, D.; Moller, A.; Neilsen, E.; Nichol, R. C.; Nord, B.; Nugent, P.; Ogando, R. L. C.; Palmese, A.; Pan, Y-C; Plazas, A. A.; Pursiainen, M.; Romer, A. K.; Roodman, A.; Rozo, E.; Rykoff, E. S.; Sako, M.; Sanchez, E.; Scarpine, V; Schindler, R.; Schubnell, M.; Scolnic, D.; Serrano, S.; Sevilla-Noarbe, I; Sharp, R.; Smith, M.; Soares-Santos, M.; Sobreira, F.; Sommer, N. E.; Spinka, H.; Suchyta, E.; Sullivan, M.; Swann, E.; Tarle, G.; Thomas, D.; Thomas, R. C.; Troxel, M. A.; Tucker, B. E.; Uddin, S. A.; Walker, A. R.; Wester, W.; Wiseman, P.; Wolf, R. C.; Yanny, B.; Zhang, B. and Zhang, Y. (2019): First Cosmology Results using Type Ia Supernovae from the Dark Energy Survey: Constraints on Cosmological Parameters. In: Astrophysical Journal Letters, Vol. 872, No. 2, L30

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We present the first cosmological parameter constraints using measurements of type Ia supernovae (SNe Ia) from the Dark Energy Survey Supernova Program (DES-SN). The analysis uses a subsample of 207 spectroscopically confirmed SNe. Ia from the first three years of DES-SN, combined with a low-redshift sample of 122 SNe from the literature. Our "DES-SN3YR" result from these 329 SNe. Ia is based on a series of companion analyses and improvements covering SN. Ia discovery, spectroscopic selection, photometry, calibration, distance bias corrections, and evaluation of systematic uncertainties. For a flat Lambda CDM model we find a matter density Omega(m) = 0.331 +/- 0.038. For a flat wCDM model, and combining our SN. Ia constraints with those from the cosmic microwave background (CMB), we find a dark energy equation of state w = -0.978 +/- 0.059, and Omega(m) = 0.321 +/- 0.018. For a flat w(0)w(a)CDM model, and combining probes from SN. Ia, CMB and baryon acoustic oscillations, we find w(0) = -0.885 +/- 0.114 and w(a) = -0.387 +/- 0.430. These results are in agreement with a cosmological constant and with previous constraints using SNe. Ia (Pantheon, JLA).

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