#x (kpc)   v (km/s)  v_err (km/s)
 -6.19   21.78   10.86
 -4.25   34.83    9.99
 -2.92   46.02    9.99
 -2.02   20.84    9.99
 -1.38   19.27    9.99
 -0.74   15.59    9.99
 -0.11    1.11    9.99
  0.53    1.21    9.99
  1.17  -14.91    9.99
  1.80  -20.85    9.99
  2.44  -35.86    9.99
  3.08  -42.13    9.99
  3.71  -26.26    9.99
  4.99  -32.98    9.99