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Fig. A.4

image

Results of continuum fitting with the task uvfit in Miriad without splitting the data into two observing days. The top and bottom rows show the results for Mira A and Mira B, respectively. The left column shows the results when Mira A was fitted with a uniform disk and a Gaussian (UD + Gaussian), while the right shows the results when Mira was fitted with the same uniform disk only (UD-only). The parameters for Mira A and B are fixed to those from Vlemmings et al. (2015), except the position of the additional Gaussian component for the UD + Gaussian model of Mira A. The sizes of the uniform disk and Gaussian models for the respective spectral windows are shown by blue open ellipses/circles (larger and smaller, respectively). In all the panels, the orange contour levels for the continuum model are 3,10,30,60,120,180,240,300,360,420, and 540 × 0.20 mJy. The green contours and the greyscale maps are the residual images produced after the modelled continuum visibilities have been subtracted from the respective windows. The residual contour levels for the images of Mira A (top row) are −160,−80,−40,−20,−10,10,20,40, and 80 × σ, and for Mira B (bottom row) are −4,−2,2, and 4 × σ, where σ = 0.04 mJy. The restoring beam of FWHM is indicated in orange in the bottom right corner in each panel.

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