# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.133135        0.00137236    
     0.460000          0.700000          0.126424        0.00122812    
     0.700000           1.00000          0.120822        0.00143405    
      1.00000           1.54000          0.114048        0.00140368    
      1.54000           2.40000          0.103997        0.00180915    
      2.40000           4.80000         0.0992440        0.00201618    
      4.80000           10.0000         0.0794602        0.00267513