# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0152455        0.00912525    
     0.460000          0.700000        0.00770802        0.00977512    
     0.700000           1.00000         0.0289835        0.00483822    
      1.00000           1.54000         0.0146955        0.00719732    
      1.54000           2.40000        0.00927479         0.0113041    
      2.40000           4.80000         0.0275017        0.00801588    
      4.80000           10.0000         0.0201800         0.0160292