# type  t   guess  shift  shift_err
   0       0.0    0.00000000    0.00000000    0.00000000
   1     896.5   -0.00081278    1.62703904    0.00335668
   1    1984.5   -0.00081278    3.60167037    0.00742647
   1    3040.0   -0.00081278    5.51632876    0.01137062
   1    4089.5   -0.00081278    7.41913894    0.01528836
   1    5148.5   -0.00081278    9.33819909    0.01923756
   1    6216.5   -0.00081278   11.27257803    0.02321623
   1    7276.5   -0.00081278   13.19148422    0.02716104