Composite of the 1.3 mm frequency scan carried out with the SMA between 202 and 242 GHz. Each individual spectrum was extracted from the natural weighted datacubes at the peak of emission position and . The calculated continuum level is represented by a straight line (see Sect. 3 for details). The CO J = 2 − 1 emission line, labeled in the figure, dominates the spectral range. This line is shown in a separate box in the upper right hand size, where the velocity scale in the X-axis is referred to the rest frequency of the transition. The double Gaussian profile fitted to the CO feature (see Sect. 4.1 for details) are shown. both the individual velocity component (dotted line) and the total fitted profile (solid line) are shown.