# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0794426        0.00433111    
     0.460000          0.700000         0.0799210        0.00437873    
     0.700000           1.00000         0.0821215        0.00541400    
      1.00000           1.54000         0.0818640        0.00745067    
      1.54000           2.40000         0.0905334         0.0106247    
      2.40000           4.80000          0.140426         0.0164593    
      4.80000           10.0000          0.137889         0.0340113