# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.192811        0.00119774    
     0.460000          0.700000          0.195363        0.00117314    
     0.700000           1.00000          0.197151        0.00139086    
      1.00000           1.54000          0.202563        0.00163879    
      1.54000           2.40000          0.198893        0.00235026    
      2.40000           4.80000          0.183839        0.00321015    
      4.80000           10.0000          0.171335        0.00552383