# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000           1.00000         0.0206010        0.00790325    
      1.00000           1.54000         0.0597263        0.00408973    
      1.54000           2.40000         0.0644423        0.00308335    
      2.40000           4.80000         0.0609604        0.00305430    
      4.80000           10.0000         0.0658933        0.00312615