# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0616962        0.00626240    
     0.460000          0.700000         0.0644400        0.00580158    
     0.700000           1.00000         0.0628418        0.00657904    
      1.00000           1.54000         0.0757295        0.00517934    
      1.54000           2.40000         0.0725990        0.00622492    
      2.40000           4.80000         0.0757025        0.00740686    
      4.80000           10.0000         0.0781344         0.0102518