# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0941107        0.00931128    
     0.460000          0.700000         0.0864287        0.00625612    
     0.700000           1.00000         0.0780701        0.00701617    
      1.00000           1.54000         0.0814104        0.00594523    
      1.54000           2.40000         0.0601610        0.00844520    
      2.40000           4.80000         0.0211493         0.0167361    
      4.80000           10.0000         0.0718290         0.0170843