Single channel VGPS image at the velocity of peak associated
13CO emission. The contours are of integrated 13CO
intensity, W13CO. Tick marks on the contours point
towards decreasing values of W13CO.
Spectra from the 75% threshold criterion.
Spectra from the 85% threshold criterion.
The grey spectrum is HI from the VGPS and black spectrum is
13CO from the GRS. The black vertical line marks
the peak 13CO velocity and the dashed vertical line
marks the tangent point velocity.