\begin{table}%ta.12 online
  \caption{\label{sbs1054abun}Physical conditions and chemical abundances of the ionized gas in SBS~0948+532, SBS~1054+365, and SBS~1211+540.}
%\centerline
 {\small   \begin{tabular}{l  rrrr}
 \hline\hline
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Object &    SBS 0948+532     &     SBS 1054+365    &  SBS 1054+365b$^a$  &   SBS 1211+540     \\
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\hline
\noalign{\smallskip}				 $T_{\rm e}$(O III) (K) &   $13~100 \pm 600$   &   $13~700 \pm  900$ &   $11~800 \pm  1100$ &   $17~100 \pm 600$\\
$T_{\rm e}$(O II) (K) &   $12~200 \pm 400$  &  $12~600 \pm 700$  & $11~300 \pm 900$  &  $15~000 \pm 400$  \\
$N_{\rm e}$ (cm$^{-3}$) & $250 \pm  80$  &  $<$100 & $300 \pm  200$  & $320 \pm  50$ \\
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12+log(O$^{+}$/H$^+$)   &    $7.33 \pm 0.05$  &    $7.22 \pm 0.10$  & $7.97 \pm 0.18$  &    $6.88 \pm 0.05$ \\
12+log(O$^{++}$/H$^+$)  &    $7.94 \pm 0.05$  &    $7.92 \pm 0.07$  &	 $7.62 \pm 0.12$  &    $7.57 \pm 0.04$ \\
12+log(O/H)             &    $8.03 \pm0.05$  &    $8.00 \pm 0.07$  & $8.13 \pm 0.16$  & $7.65 \pm 0.04$ \\
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log(O$^{++}$/O$^+$)     &    0.61  $\pm$  0.08  &    0.70  $\pm$  0.11  & $-$0.35  $\pm$  0.20  &    0.69  $\pm$  0.07 \\
12+log(N$^+$/H$^+$)     &    5.91  $\pm$  0.05  &    5.81  $\pm$  0.08  &	 6.49  $\pm$  0.20  &    5.26  $\pm$  0.12 \\
12+log(N/H)             &    6.61  $\pm$  0.07  &    6.59  $\pm$  0.09  &	 6.65  $\pm$  0.21  &    6.03  $\pm$  0.13 \\
log(N/O)                & $-$1.42  $\pm$  0.08  & $-$1.41  $\pm$  0.08  & $-$1.47  $\pm$  0.20  & $-$1.62  $\pm$  0.10 \\  
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12+log(S$^+$/H$^+$)     &    5.43  $\pm$  0.12  &    5.37  $\pm$  0.07  &	 5.89  $\pm$  0.16  &    5.04  $\pm$  0.06 \\
12+log(S$^{++}$/H$^+$)  &    6.16  $\pm$  0.11  &    5.99  $\pm$  0.22  &	 \nodata	  &    6.02  $\pm$  0.14 \\
12+log(S/H)             &    6.34  $\pm$  0.11  &    6.21  $\pm$  0.18  &	 \nodata	  &    6.18  $\pm$  0.12 \\
log(S/O)                & $-$1.69  $\pm$  0.14  & $-$1.79  $\pm$  0.15  &	 \nodata	  & $-$1.47  $\pm$  0.14 \\
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12+log(Ne$^{++}$/H$^+$) &    7.21  $\pm$  0.09  &    7.25  $\pm$  0.09  &	 \nodata	  &    6.82  $\pm$  0.08 \\
12+log(Ne/H)            &    7.30  $\pm$  0.09  &    7.33  $\pm$  0.12  &	 \nodata	  &    6.90  $\pm$  0.08 \\
log(Ne/O)               & $-$0.73  $\pm$  0.12  & $-$0.67  $\pm$  0.11  &	 \nodata	  & $-$0.75  $\pm$  0.10 \\
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12+log(Ar$^{+2}$/H$^+$) &    \nodata	      &    5.62  $\pm$  0.10  &	 \nodata	  &    \nodata         \\
12+log(Ar$^{+3}$/H$^+$) &    4.79  $\pm$  0.15  &    4.90  $\pm$  0.20  &	 \nodata	  &    4.77  $\pm$  0.22 \\
12+log(Ar/H)            &    \nodata	      &    5.71  $\pm$  0.17  &	 \nodata	  &    \nodata         \\
log(Ar/O)               &    \nodata	      & $-$2.29  $\pm$  0.14  &	 \nodata	  &    \nodata         \\
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12+log(Cl$^{++}$/H$^+$) &    3.97  $\pm$  0.18  &    \nodata	    &	 \nodata	  &    \nodata         \\
12+log(Fe$^{++}$/H$^+$) &    5.64  $\pm$  0.09  &	   \nodata 	    &    \nodata	  &    \nodata	       \\
12+log(Fe/H)            &    6.25  $\pm$  0.09  &	   \nodata 	    &    \nodata	  &    \nodata	       \\
log(Fe/O)               & $-$1.78  $\pm$  0.10  &	   \nodata 	    &    \nodata      &    \nodata	       \\
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12+log(He$^+$/H$^+$)    &   10.88  $\pm$  0.04  &   10.88  $\pm$  0.07  &   11.30:          &    10.90  $\pm$  0.15  \\
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\tableline
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[O/H]$^b$               & $-$0.63  $\pm$  0.10  & $-$0.66  $\pm$  0.12  & $-$0.53             & $-$1.01  $\pm$  0.09 \\
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\tableline
\end{tabular}}
\medskip
$^a$ Electron temperatures estimated using empirical relations; $^b$~[O/H]=log(O/H)-log(O/H)$_{\odot}$, using 12+log(O/H)$_{\odot} = 8.66 \pm 0.05$ \citep{ASP05}.
\end{table}