# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.180101        0.00374187    
     0.460000          0.700000          0.180029        0.00391255    
     0.700000           1.00000          0.173754        0.00489079    
      1.00000           1.54000          0.151502        0.00489629    
      1.54000           2.40000          0.147112        0.00665407    
      2.40000           4.80000          0.107409        0.00937730    
      4.80000           10.0000         0.0957631         0.0172870