Results of hybrid mapping of Sgr A^∗ at 3 mm. Top left panel: beam-convolved image from the dataset of project BF114A (2015-05-22) using VLBA and LMT. Top right panel: beam-convolved image from the dataset of project BF114B (2015-05-23) using VLBA, LMT and GBT. The contours indicate the flux density level (dashed-grey contours are negative), scaled logarithmically and separated by a factor of two, with the lowest level set to the 3σ-noise level. Bottom left panel: residual map of Sgr A^∗ after primary component subtraction from the BF114A dataset, using natural weighting. No clear pattern is seen in the residual image. Bottom right panel: natural-weighted residual map for Sgr A^∗, epoch B, after subtraction of the best-fitting 2D Gaussian source component. The remaining excess flux towards the east is highly concentrated and clearly present. Both residual images use a cross to indicate the centre of the primary (subtracted) component on the sky. Image and model parameters are listed in Tables 1 and 2, respectively.