\begin{table}%t4
\caption{\label{t-egs_good}The extragalactic sources with reliable $RM$ estimates}
%\centering
\par
\begin{tabular}{lrlr|lrlr|lrlr}
\hline \hline\\
$l$ & $b$ & \multicolumn{1}{c}{$RM \pm\Delta RM$} & $I_{\rm H\alpha}$ & $l$ & $b$ & \multicolumn{1}{c}{$RM \pm\Delta RM$} & $I_{\rm H\alpha}$ & $l$ & $b$ & \multicolumn{1}{c}{$RM\pm\Delta RM$} & $I_{\rm H\alpha}$ \\
deg & deg & \multicolumn{1}{c}{rad/m$^2$} & $R$ & deg & deg & \multicolumn{1}{c}{rad/m$^2$} & $R$ & deg & deg & \multicolumn{1}{c}{rad/m$^2$} & $R$ \\
\hline
253.30 &  0.89 &   $-$8 $\pm$ 12 &  440 & 274.70 & $-$2.80 &  420 $\pm$  4 &  27 & 314.50 &  0.30 & $-$738 $\pm$ 19 &  52 \\
253.52 &  0.83 &  $-$50 $\pm$ 26 &  582 & 274.77 &  0.25 &  $-$76 $\pm$ 22 &  25 & 314.82 &  0.89 & $-$507 $\pm$ 25 &  38 \\
254.81 &  0.93 &   84 $\pm$ 13 &  501 & 275.02 &  0.82 & $-$101 $\pm$ 25 &  28 & 317.54 & $-$0.57 &  395 $\pm$ 27 &  24 \\
254.95 &  0.63 &    8 $\pm$ 32 &  495 & 275.48 & $-$0.68 &  248 $\pm$ 13 &  28 & 319.34 &  1.08 &  241 $\pm$ 21 &  37 \\
255.16 &  0.24 &  $-$35 $\pm$ 16 &  436 & 275.56 &  1.02 &   16 $\pm$  7 &  23 & 320.83 &  0.88 &   $-$8 $\pm$ 20 &  22 \\
255.27 &  0.16 &   26 $\pm$ 23 &  407 & 275.56 & $-$0.20 &  112 $\pm$ 30 &  31 & 321.48 &  1.02 & $-$243 $\pm$  8 &   9 \\
255.36 & $-$0.26 &   97 $\pm$ 10 &  456 & 275.83 &  0.16 & $-$107 $\pm$  7 &  27 & 321.58 & $-$0.76 & $-$138 $\pm$  9 &  20 \\
255.36 &  0.50 & $-$115 $\pm$ 13 &  556 & 275.86 &  0.94 &    0 $\pm$ 21 &  23 & 323.15 & $-$0.52 &   83 $\pm$ 25 &   9 \\
256.14 &  0.25 &   44 $\pm$ 17 &  484 & 276.46 &  0.89 &  $-$17 $\pm$ 20 &  23 & 324.77 &  0.61 &  $-$66 $\pm$ 14 &   9 \\
256.64 & $-$0.22 &  172 $\pm$ 15 &  454 & 277.78 & $-$0.73 &  $-$36 $\pm$ 23 &  21 & 325.81 &  1.08 &  $-$15 $\pm$ 31 &   8 \\
257.47 &  0.54 &   23 $\pm$ 20 &  307 & 277.78 & $-$0.81 &  $-$77 $\pm$  3 &  23 & 325.83 & $-$0.30 &  356 $\pm$ 18 &  11 \\
257.71 & $-$0.66 &  144 $\pm$ 20 &  411 & 279.04 & $-$0.88 &  239 $\pm$ 17 &  32 & 325.93 &  2.92 & $-$159 $\pm$ 28 &  14 \\
257.92 &  0.65 &   76 $\pm$ 14 &  292 & 279.15 & $-$0.63 &  341 $\pm$ 24 &  31 & 326.30 &  2.17 & $-$357 $\pm$ 10 &  11 \\
258.52 &  1.02 &  196 $\pm$ 26 &  342 & 279.15 & $-$0.65 &  329 $\pm$ 20 &  30 & 326.54 &  2.18 & $-$505 $\pm$ 14 &  12 \\
258.77 &  0.08 &  221 $\pm$ 16 &  307 & 279.33 &  0.80 & $-$157 $\pm$ 18 &  28 & 326.69 & $-$1.16 & $-$142 $\pm$ 22 &  20 \\
259.05 & $-$0.72 &  175 $\pm$ 12 &  295 & 280.62 & $-$0.14 & $-$112 $\pm$ 15 &  25 & 326.80 &  1.57 & $-$768 $\pm$  8 &  13 \\
259.05 & $-$0.75 &  150 $\pm$ 12 &  275 & 282.46 &  0.24 &  256 $\pm$ 23 &  30 & 326.94 &  2.40 & $-$808 $\pm$ 29 &  12 \\
260.69 & $-$0.23 &  204 $\pm$ 12 &  829 & 284.30 &  0.81 & $-$547 $\pm$ 25 &  47 & 327.31 &  0.88 & $-$189 $\pm$ 26 &  14 \\
263.50 &  0.17 &  260 $\pm$ 28 &  630 & 285.15 &  0.96 &  168 $\pm$ 31 &  55 & 327.52 &  2.70 & $-$595 $\pm$ 16 &  15 \\
264.24 &  0.88 &  406 $\pm$  9 &  554 & 295.17 &  0.01 &  363 $\pm$ 22 &  66 & 327.87 &  1.60 & $-$818 $\pm$ 21 &  12 \\
265.69 &  0.85 &   70 $\pm$ 28 &  449 & 297.67 &  0.77 &  570 $\pm$ 11 &  62 & 328.62 &  1.52 & $-$933 $\pm$ 30 &  12 \\
266.14 &  1.08 &  211 $\pm$ 29 &  334 & 299.51 & $-$1.10 &  315 $\pm$ 21 &  41 & 328.80 &  2.80 & $-$350 $\pm$ 25 &  11 \\
266.27 &  0.66 &  396 $\pm$ 18 &  427 & 300.47 & $-$0.99 &  412 $\pm$ 18 &  59 & 329.20 &  2.83 & $-$348 $\pm$ 11 &  12 \\
267.17 &  0.47 &  323 $\pm$ 28 &  487 & 301.14 & $-$0.09 &  350 $\pm$ 18 &  68 & 330.12 & $-$1.08 & $-$931 $\pm$ 25 &  31 \\
268.62 &  0.58 &  256 $\pm$ 15 &  632 & 301.70 &  0.25 &  296 $\pm$33 &  75 & 330.35 &  1.81 &   25 $\pm$ 35 &  11 \\
269.05 &  0.17 &  456 $\pm$ 16 & 1015 & 302.60 & $-$1.17 &  159 $\pm$ 25 &  50 & 330.56 &  1.74 &    4 $\pm$ 11 &  12 \\
269.55 &  0.45 &  137 $\pm$ 18 &  725 & 303.30 &  0.51 & $-$370 $\pm$ 14 &  45 & 335.32 &  0.60 & $-$138 $\pm$ 11 &  38 \\
270.56 & $-$0.85 & $-$152 $\pm$ 23 &  666 & 304.53 &  1.00 &   40 $\pm$ 28 &  47 & 337.06 &  0.85 & $-$739 $\pm$ 32 &  59 \\
270.91 &  0.93 & $-$149 $\pm$ 22 &  521 & 305.62 & $-$1.16 &  $-$61 $\pm$ 28 & 114 & 339.65 & $-$0.24 & $-$398 $\pm$ 19 &  40 \\
271.22 & $-$0.35 &  215 $\pm$ 29 &  512 & 306.87 &  0.02 & $-$197 $\pm$ 27 &  54 & 342.16 & $-$0.74 &  127 $\pm$ 15 &  75 \\
271.30 & $-$0.06 &  136 $\pm$ 16 &  380 & 306.92 & $-$0.70 &   52 $\pm$ 16 & 105 & 347.40 & $-$1.04 & $-$524 $\pm$ 36 &  49 \\
271.52 & $-$1.01 &   75 $\pm$ 28 &  602 & 308.64 & $-$0.62 & $-$133 $\pm$ 27 &  54 & 350.52 & $-$0.73 &  277 $\pm$ 32 &  49 \\
271.70 & $-$0.38 &  $-$93 $\pm$ 18 &  600 & 310.20 & $-$1.04 & $-$584 $\pm$ 19 &  52 & 351.31 & $-$0.53 & $-$247 $\pm$ 15 &  54 \\
272.36 &  0.62 & $-$296 $\pm$ 28 &  506 & 313.96 & $-$0.76 & $-$480 $\pm$ 22 &  68 & 352.13 &  1.15 &   76 $\pm$ 30 &  43 \\
273.46 &  0.68 & $-$106 $\pm$ 19 &  436 & 313.99 &  0.94 & $-$828 $\pm$ 17 &  64 & 356.57 &  0.87 &  985 $\pm$ 30&   34 \\      
273.57 &  1.28 &   20 $\pm$ 25 &  307 & 314.02 &  1.01 & $-$579 $\pm$ 20 &  54 &        &       &  \multicolumn{1}{c}{} &     \\
\hline
\end{tabular}
%\vspace*{2mm}
\end{table}