# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0188680        0.00255885    
     0.460000          0.700000         0.0147084        0.00227058    
     0.700000           1.00000         0.0149857        0.00233643    
      1.00000           1.54000        0.00963186        0.00295388    
      1.54000           2.40000         0.0183016        0.00274609    
      2.40000           4.80000        0.00274245        0.00924335    
      4.80000           10.0000        0.00850459         0.0111689