Channel velocity map (Jy beam⁻¹) of the SiO maser (v = 1, J = 1−0) emission for the epoch as indicated by the label in the last panel. The contour levels are at 5σ, 7σ, 9σ, and 11σ, where σ is the rms noise measured in the strongest channel of the image cube (Table 1). Position offsets are relative to the position of the strongest pixel in the channel that has the maximum peak flux (cyan cross mark).