# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0411862        0.00647933    
     0.460000          0.700000         0.0488322        0.00567846    
     0.700000           1.00000         0.0644408        0.00772343    
      1.00000           1.54000         0.0454348        0.00936565    
      1.54000           2.40000         0.0531228         0.0148600    
      2.40000           4.80000         0.0290168         0.0310626    
      4.80000           10.0000          0.137632         0.0274639