# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.137178        0.00234497    
     0.460000          0.700000          0.143712        0.00227916    
     0.700000           1.00000          0.152266        0.00278959    
      1.00000           1.54000          0.151367        0.00274848    
      1.54000           2.40000          0.156604        0.00326461    
      2.40000           4.80000          0.155380        0.00416866    
      4.80000           10.0000          0.133718        0.00598729