# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0499024        0.00244405    
     0.460000          0.700000         0.0407472        0.00243029    
     0.700000           1.00000         0.0552236        0.00297351    
      1.00000           1.54000         0.0477338        0.00281534    
      1.54000           2.40000         0.0490528        0.00320752    
      2.40000           4.80000         0.0473538        0.00390490    
      4.80000           10.0000         0.0511865        0.00568331