# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.151862        0.00445174    
     0.460000          0.700000          0.155605        0.00350049    
     0.700000           1.00000          0.142283        0.00569335    
      1.00000           1.54000          0.158865        0.00501575    
      1.54000           2.40000          0.183793        0.00731979    
      2.40000           4.80000          0.134871        0.00914202    
      4.80000           10.0000          0.114660         0.0156313