# type  t   guess  shift  shift_err
   0       0.0    0.00000000    0.00000000    0.00000000
   1    -690.0   -0.00081278   -0.86779117    0.04047782
   1    1159.5   -0.00081278    1.45563927    0.06797820
   1    2393.0   -0.00081278    3.00442574    0.14023586
   1    3770.0   -0.00081278    4.73263992    0.22082789
   1    5163.5   -0.00081278    6.48075598    0.30230862