Relationship between BLR radius and 5100 Å AGN luminosity with the best-fit line from Bentz et al. (2013) (dashed line) and the RM samples from Du & Wang (2019) (black points) and Grier et al. (2017) (grey points). Previous GRAVITY BLR radius measurements of IRAS 09149−6206 and 3C 273 are shown along with the BLR mean radius for NGC 3783 as filled red stars. The time-lag measurement of ∼10 days for NGC 3783 from the literature is shown as an open star. The horizontal error bar indicates a factor of two uncertainty on the luminosity of NGC 3783 based on variability.