#x (kpc)   v (km/s)  v_err (km/s)
 -5.66  141.45    9.64
 -3.99  131.14    9.64
 -2.53  113.02    9.76
 -1.13   64.66   11.27
 -0.05   37.23    9.64
  0.67    5.66   18.83
  1.39   -2.17   19.66
  2.11 -109.24   34.20
  2.83  -56.36   17.27
  3.55  -85.61   18.93
  4.27 -113.21   18.60
  4.99 -106.27   16.49
  5.71  -75.32   27.96