MWC 656, as detected by combining all eight observed epochs in X band with VLA. (a) Image of full X band. (b) Image of LSB of X band, from 8.0 to 10.0 GHz. (c) Image of USB of X band, from 10.0 to 12.0 GHz. Contour levels are −3.0, 3.0, 4.0, 5.0, and 5.4 the noise level of each image as listed in Table 1. The synthesized beam size, also as listed in Table 1, is shown as a white ellipse in the bottom left of each panel.