Light curve of the Gaia18azj event and the microlensing model fit using the Gaia data as well as the ground-based survey data from ZTF, SMARTS, and OGLE. The dashed magenta line represents the model without parallax, while the blue and black solid lines show the positive and negative solutions for the parallax model, respectively. The bottom panel shows the residuals with respect to the negative solution for the parallax model.