# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.106303        0.00251325    
     0.460000          0.700000          0.111817        0.00238424    
     0.700000           1.00000          0.112906        0.00398143    
      1.00000           1.54000          0.114802        0.00340414    
      1.54000           2.40000         0.0998178        0.00322539    
      2.40000           4.80000         0.0844001        0.00346101    
      4.80000           10.0000         0.0690459        0.00453166