Bonvin, V.Millon, M.Chan, J. H. -H.Courbin, F.Rusu, C. E.Sluse, D.Suyu, S. H.Wong, K. C.Fassnacht, C. D.Marshall, P. J.Treu, T.Buckley-Geer, E.Frieman, J.Hempel, A.Kim, S.Lachaume, R.Rabus, M.Chao, D. C. -Y.Chijani, M.Gilman, D.Gilmore, K.Rojas, K.Williams, P.Anguita, T.Kochanek, C. S.Morgan, C.Motta, V.Tewes, M.Meylan, G.2019-09-262019-09-262019-09-262019-09-1110.1051/0004-6361/201935921https://infoscience.epfl.ch/handle/20.500.14299/161593WOS:000485214900001We present new measurements of the time delays of WFI2033-4723. The data sets used in this work include 14 years of data taken at the 1.2 m Leonhard Euler Swiss telescope, 13 years of data from the SMARTS 1.3 m telescope at Las Campanas Observatory and a single year of high-cadence and high-precision monitoring at the MPIA 2.2 m telescope. The time delays measured from these different data sets, all taken in the R-band, are in good agreement with each other and with previous measurements from the literature. Combining all the time-delay estimates from our data sets results in Delta t(AB) = 36.2(-0.8)(+0.7) days (2.1% precision), Delta t(AC) = 23.3(-1.4)(+1.2) days (5.6%) and Delta t(BC) = 59.4(-1.3)(+1.3) days (2.2%). In addition, the close image pair A1-A2 of the lensed quasars can be resolved in the MPIA 2.2 m data. We measure a time delay consistent with zero in this pair of images. We also explore the prior distributions of microlensing time-delay potentially affecting the cosmological time-delay measurements of WFI2033-4723. Our time-delay measurements are not precise enough to conclude that microlensing time delay is present or absent from the data. This work is part of a H0LiCOW series focusing on measuring the Hubble constant from WFI2033-4723.Astronomy & AstrophysicsAstronomy & Astrophysicsgravitational lensing: stronggalaxies: individual: wfi2033-4723cosmological parametershubble constanth-0variabilitygalaxyconstraintsprecisionmodeldiscraytext::journal::journal article::research article