# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.287374        0.00291524    
     0.460000          0.700000          0.291653        0.00309070    
     0.700000           1.00000          0.245794        0.00447928    
      1.00000           1.54000          0.259225        0.00337555    
      1.54000           2.40000          0.251058        0.00300456    
      2.40000           4.80000          0.218282        0.00329667    
      4.80000           10.0000          0.171264        0.00415633