#x (kpc)   v (km/s)  v_err (km/s)
 -8.33  102.62    9.88
 -6.42  100.34    7.67
 -5.52   99.51    7.67
 -4.89   99.02    7.67
 -4.26   95.56    7.67
 -3.63   92.82    7.67
 -3.01   83.03    7.67
 -2.38   76.35    7.67
 -1.75   63.02    7.67
 -1.13   46.25    7.67
 -0.50   22.32    7.67
  0.13   -2.29    7.67
  0.75  -24.58    7.67
  1.38  -42.37    7.67
  2.01  -66.34    7.67
  2.64  -81.85    7.67
  3.26  -89.30    7.67
  3.89  -93.70    7.67
  4.52  -89.62    7.67
  5.14  -94.47    7.67
  5.77  -93.70    7.67
  6.40 -104.14    7.67
  7.03 -116.54    7.67
  7.65 -108.77    7.67
  8.28 -114.58    7.67
  8.91 -113.65    7.67