#x (kpc)   v (km/s)  v_err (km/s)
 -4.04  -75.20    9.95
 -2.33  -68.10    9.95
 -1.65  -43.94    9.95
 -0.97  -26.84    9.95
 -0.29  -17.90    9.95
  0.39   -1.07    9.95
  1.07   34.15    9.95
  1.75   46.12    9.95
  2.43   61.97    9.95
  3.11   69.10    9.95
  3.79   83.36    9.95
  4.47   80.30    9.95
  5.15   89.15    9.95
  5.83   81.76    9.95
  6.51  102.11    9.95
  7.19   97.38    9.95
  8.17   98.97   11.07