#x (kpc)   v (km/s)  v_err (km/s)
-10.28  100.25    7.80
 -8.60   96.20    7.80
 -7.99   91.34    7.80
 -7.39   80.49    7.80
 -6.78   72.13    7.80
 -6.18   76.51    7.80
 -5.58   67.04    7.80
 -4.97   60.51    7.80
 -4.37   62.04    7.80
 -3.76   59.69    7.80
 -3.16   59.20    7.80
 -2.56   54.63    7.80
 -1.95   42.15    7.80
 -1.35   36.50    7.80
 -0.75   26.67    7.80
 -0.14    8.26    7.80
  0.46  -12.64    7.80
  1.07  -17.87    7.80
  1.67  -30.44    7.80
  2.27  -41.19    7.80
  2.88  -53.01    7.80
  3.48  -58.66    7.80
  4.08  -62.84    7.80
  4.69  -68.49    7.80
  5.29  -69.17    7.80
  5.90  -65.55    7.80
  6.50  -58.76    7.80
  7.10  -72.83    7.80
  7.71  -70.64    7.80
  8.31  -78.65    7.80
  8.91  -87.76    7.80
  9.52  -96.25    7.80
 10.12 -100.85    7.80
 10.73 -102.03    7.80
 11.33  -99.87    7.80
 11.93 -101.70    7.80
 12.81  -94.75    7.80