Table 5: Sensitivities of abundances ($\log n$(X)) to variations in the atmospheric parameters for TO and clump stars in NGC 6253.
$\Delta$ $\sigma_{T\rm {eff}}$ $\sigma_{\log g}$ $\sigma_{\xi}$
  $\Delta\mbox{$T_{\rm eff}$ }=\pm70$ K $\Delta{\log g}=\pm0.25$ dex $\Delta{\xi} =\pm0.10$ km s-1
069885      
Fe  I +0.05/-0.05 -0.02/+0.03 -0.03/+0.03
Na  I +0.03/-0.04 -0.05/+0.04 -0.02/+0.01
Mg  I +0.03/-0.03 -0.03/+0.03 -0.02/+0.02
Si  I +0.03/-0.02 -0.01/+0.02 -0.01/+0.02
Ca  I +0.05/-0.04 -0.05/+0.05 -0.03/+0.04
Ti  I +0.06/-0.07 -0.01/+0.01 -0.03/+0.02
Cr  I +0.05/-0.05 -0.01/+0.02 -0.03/+0.03
Ni  I +0.05/-0.04 0.0/+0.01 -0.04/+0.03
Ba  II +0.02/-0.02 +0.04/-0.05 -0.07/+0.07
105495      
Fe  I +0.01/+0.03 +0.08/-0.01 -0.03/+0.07
Na  I +0.07/-0.04 -0.05/+0.04 -0.02/+0.05
Mg  I 0.00/+0.01 +0.02/+0.01 -0.03/+0.04
Si  I -0.05/+0.06 +0.07/-0.02 -0.02/+0.03
Ca  I +0.08/-0.05 -0.03/+0.06 -0.04/+0.07
Ti  I +0.12/-0.06 +0.03/+0.02 -0.05/+0.11
Cr  I +0.08/+0.02 +0.03/+0.02 -0.05/+0.09
Ni  I +0.01/+0.04 +0.09/-0.02 -0.04/+0.08
Ba  II +0.02/-0.02 +0.05/-0.05 -0.06/+0.07


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