#x (kpc)   v (km/s)  v_err (km/s)
 -5.80   88.65    9.35
 -3.95   94.92    9.35
 -3.19   85.95    9.35
 -2.44   80.43    9.35
 -1.69   77.63    9.35
 -0.93   31.53    9.35
 -0.18   -3.76    9.35
  0.57  -39.71    9.35
  1.33  -60.14    9.35
  2.08  -93.19    9.35
  2.84  -96.97    9.35
  3.59 -111.21    9.35
  4.97 -117.16    9.35