Position-velocity diagrams for the 1 mm (left panel) and 3 mm (right panel) methanol lines. The contour spacing is 50 mJy beam^-1 (2.4σ) and 10 mJy beam^-1 (2σ) for the 1 mm and 3 mm methanol lines, respectively. The red points with error bars show the first order moment measured at each position offset. The horizontal dashed line shows the source v_LSR (6.5 km s^-1). The vertical dashed lines indicate the center of the cut.