# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0129193        0.00318430    
     0.460000          0.700000         0.0145175        0.00259375    
     0.700000           1.00000        0.00923821        0.00373501    
      1.00000           1.54000        0.00891267        0.00365942    
      1.54000           2.40000         0.0237538        0.00298909    
      2.40000           4.80000         0.0101981        0.00625602    
      4.80000           10.0000        0.00278573         0.0155465