# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0275790         0.0105437    
     0.460000          0.700000         0.0212306         0.0105046    
     0.700000           1.00000         0.0344278         0.0103744    
      1.00000           1.54000         0.0225650        0.00863846    
      1.54000           2.40000         0.0294356         0.0101276    
      2.40000           4.80000         0.0347883         0.0121392    
      4.80000           10.0000         0.0410711         0.0181124