# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.112579        0.00188292    
     0.460000          0.700000          0.112467        0.00179482    
     0.700000           1.00000          0.107088        0.00226482    
      1.00000           1.54000          0.108361        0.00250844    
      1.54000           2.40000          0.105700        0.00334830    
      2.40000           4.80000          0.101465        0.00475214    
      4.80000           10.0000         0.0766269        0.00965900