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Hyer, Matthew Cornachione, Vivien Bonvin","submitted_at":"2018-12-13T19:17:22Z","abstract_excerpt":"We present 13 seasons of $R$-band photometry of the quadruply-lensed quasar WFI 2033-4723 from the 1.3m SMARTS telescope at CTIO and the 1.2m Euler Swiss Telescope at La Silla, in which we detect microlensing variability of $\\sim0.2$ mags on a timescale of $\\sim$6 years. Using a Bayesian Monte Carlo technique, we analyze the microlensing signal to obtain a measurement of the size of this system's accretion disk of $\\log (r_s/{\\rm cm}) = 15.86^{+0.25}_{-0.27}$ at $\\lambda_{rest} = 2481{\\rm \\AA}$, assuming a $60^\\circ$ inclination angle. 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