# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0175782        0.00152580    
     0.460000          0.700000         0.0167455        0.00135783    
     0.700000           1.00000         0.0184273        0.00160626    
      1.00000           1.54000         0.0193298        0.00160779    
      1.54000           2.40000         0.0214176        0.00205478    
      2.40000           4.80000         0.0203606        0.00264148    
      4.80000           10.0000        0.00404676        0.00534395