# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0493505        0.00712253    
     0.460000          0.700000         0.0696704        0.00639086    
     0.700000           1.00000         0.0738601        0.00811636    
      1.00000           1.54000         0.0625290        0.00846886    
      1.54000           2.40000         0.0613687         0.0126321    
      2.40000           4.80000         0.0708273         0.0174336    
      4.80000           10.0000         0.0628904         0.0379474