# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0419594        0.00235321    
     0.460000          0.700000         0.0426499        0.00220656    
     0.700000           1.00000         0.0316995        0.00252792    
      1.00000           1.54000         0.0268059        0.00254114    
      1.54000           2.40000         0.0220060        0.00337596    
      2.40000           4.80000         0.0181116        0.00454159    
      4.80000           10.0000        0.00226175         0.0114527