# type  t   guess  shift  shift_err
   0       0.0    0.00000000    0.00000000    0.00000000
   1    -641.5   -0.00081278   -0.07427129    0.23207745
   1     768.5   -0.00081278    0.08718668    0.27800904
   1    1838.5   -0.00081278    0.20970690    0.66503163
   1    2922.5   -0.00081278    0.33382614    1.05705193
   1    3997.0   -0.00081278    0.45685358    1.44557096