# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.152544        0.00661376    
     0.460000          0.700000          0.164060        0.00734294    
     0.700000           1.00000          0.175268        0.00852428    
      1.00000           1.54000          0.274900         0.0125824    
      1.54000           2.40000          0.291924         0.0188015    
      2.40000           10.0000          0.232633         0.0331446