# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0448580         0.0100137    
     0.460000          0.700000         0.0501976        0.00649161    
     0.700000           1.00000         0.0436603        0.00670880    
      1.00000           1.54000         0.0274355        0.00791920    
      1.54000           2.40000         0.0301177         0.0114008    
      2.40000           4.80000         0.0348463         0.0138685    
      4.80000           10.0000         0.0502343         0.0215826