# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0505623        0.00194195    
     0.460000          0.700000         0.0416181        0.00162229    
     0.700000           1.00000         0.0271950        0.00154286    
      1.00000           1.54000         0.0133489        0.00159610    
      1.54000           2.40000        0.00535365        0.00244265    
      2.40000           4.80000         0.0223811        0.00240639    
      4.80000           10.0000         0.0302887        0.00326454