# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.104623        0.00877407    
     0.460000          0.700000          0.112916        0.00763287    
     0.700000           1.00000          0.166029         0.0101601    
      1.00000           1.54000          0.145173         0.0108473    
      1.54000           2.40000          0.148261         0.0155679    
      2.40000           4.80000          0.202602         0.0194845    
      4.80000           10.0000          0.114529         0.0342765