# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0525214        0.00781034    
     0.460000          0.700000         0.0569169        0.00495357    
     0.700000           1.00000         0.0641055        0.00498293    
      1.00000           1.54000         0.0639104        0.00435485    
      1.54000           2.40000         0.0692440        0.00544233    
      2.40000           4.80000         0.0744833        0.00624747    
      4.80000           10.0000         0.0641234        0.00980137