# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.556055        0.00635884    
     0.460000          0.700000          0.580957        0.00627542    
     0.700000           1.00000          0.606359        0.00868491    
      1.00000           1.54000          0.647600         0.0181396    
      1.54000           2.40000          0.691946         0.0264899    
      2.40000           4.80000          0.507128         0.0363458    
      4.80000           10.0000          0.313074         0.0623314