# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0243574        0.00475850    
     0.460000          0.700000         0.0241470        0.00469204    
     0.700000           1.00000         0.0258133        0.00656045    
      1.00000           1.54000         0.0348369        0.00655754    
      1.54000           2.40000         0.0438634        0.00847969    
      2.40000           4.80000         0.0240096         0.0153646    
      4.80000           10.0000         0.0602806         0.0162753