# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0209849        0.00419165    
     0.460000          0.700000         0.0132231        0.00751018    
     0.700000           1.00000         0.0169721         0.0111085    
      1.00000           1.54000         0.0338948         0.0167884    
      1.54000           2.40000         0.0508067         0.0340460    
      2.40000           4.80000          0.133348         0.0393976    
      4.80000           10.0000          0.234352         0.0729424