# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.186329        0.00806070    
     0.460000          0.700000          0.175538        0.00828236    
     0.700000           1.00000         0.0824458         0.0113514    
      1.00000           1.54000          0.113749         0.0132414    
      1.54000           2.40000          0.175460         0.0180507    
      2.40000           4.80000          0.216890         0.0154368    
      4.80000           10.0000          0.140684         0.0209609