#x (kpc)   v (km/s)  v_err (km/s)
 -5.25   99.67    9.13
 -3.43   77.42    9.13
 -2.38   83.46    9.13
 -1.64   63.76    9.13
 -0.89   41.57    9.13
 -0.14    2.46   12.25
  0.60  -19.77   13.58
  1.35  -38.86   10.25
  2.10  -67.87    9.13
  2.85  -83.08    9.13
  3.59  -81.47   10.09
  4.34  -72.87   12.85
  5.09 -102.28   13.66
  5.83  -89.86   18.88