# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0384258         0.0122484    
     0.460000          0.700000         0.0274168         0.0119895    
     0.700000           1.00000         0.0289227         0.0139248    
      1.00000           1.54000         0.0225737         0.0135526    
      1.54000           2.40000         0.0309848         0.0155678    
      2.40000           10.0000         0.0360058         0.0134417