# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.191019        0.00331665    
     0.460000          0.700000          0.242305        0.00301305    
     0.700000           1.00000          0.283638        0.00388832    
      1.00000           1.54000          0.313488        0.00358858    
      1.54000           2.40000          0.290231        0.00409251    
      2.40000           4.80000          0.217962        0.00418828    
      4.80000           10.0000          0.160356        0.00615818