\begin{table}%t1
\caption{Sample of sources studied in this paper. We give their name, their coordinates~(J2000 and galactic), the total galactic column density of neutral hydrogen~($N_{\rm H}(\ion{H}{i})$) and the total galactic column density of molecular hydrogen~($N_{\rm H}({\rm H}_{\rm 2})$) in the line of   sight, the X-ray column density of the source~($N_{\rm Hx}$), their type (SFXT or OBS~-- obscured sources) and their spectral type~(SpT). Their spectral classifications come from optical/NIR   spectroscopy, reported in the following references (Ref): c: \citet{2008Chaty}, f: \citet*{2004Filliatre}, i: \citet{2006Zand}, n1: \citet{2005Negueruela}, n2: \citet{2006Negueruelab}, n3: \citet{2007Nespoli}, p: \citet{2006Pellizza}, t: \citet{2006Tomsick}.}\label{tab1}
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\small
\begin{tabular}{c c c c c c c c c c c}
\hline
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Sources & $\alpha ({\rm J2000})$& $\delta ({\rm J2000})$ & $l$ & $b$ & $N_{\rm H}(\ion{H}{i})(10^{22})$ & $N_{\rm H}({\rm H}_{\rm 2})(10^{22})$ & $N_{\rm Hx}         (10^{22})$ & Type & SpT & Ref.\\
\hline
IGR~J16195-4945 & 16~~19~~32.20 & $-$49~~44~~30.7& 333.56&0.339&2.2&5.4&7.0& SFXT? & O/B & t\\
IGR~J16207-5129 & 16~~20~~46.26 & $-$51~~30~~06.0 & 332.46 & $-$1.050 & 1.7 & 2.2 & 3.7 & OBS & O/B & t\\
IGR~J16318-4848 & 16~~31~~48.60 & $-$48~~49~~00.0 & 335.62 & $-$0.448 & 2.1 & 3.6 & 200.0 & OBS & sgB[e] & f \\
IGR~J16320-4751 & 16~~32~~01.90 & $-$47~~52~~27.0 & 336.30 & 0.169 & 2.1 & 4.4 & 21.0 & OBS & O/BI & c\\
IGR~J16358-4726 & 16~~35~~53.80 & $-$47~~25~~41.1 & 337.01 & $-$0.007 & 2.2 & 7.3 & 33.0 & OBS & sgB[e] & c \\
IGR~J16418-4532 & 16~~41~~51.00 & $-$45~~32~~25.0 & 339.19 & 0.489 & 1.9 & 3.6 & 10.0 & SFXT? & O/B & c\\
IGR~J16465-4507 & 16~~46~~35.50 & $-$45~~07~~04.0 & 340.05 & 0.135 & 2.1 & 5.9 & 60.0 & SFXT & B0.5I & n1 \\
IGR~J16479-4514 & 16~~48~~06.60 & $-$45~~12~~08.0 & 340.16 & $-$0.124 & 2.1 & 8.2 & 7.7 & SFXT? & O/BI & c \\
IGR~J17252-3616 & 17~~25~~11.40 & $-$36~~16~~58.6 & 351.50 & $-$0.354 & 1.6 & 3.9 & 15.0 & OBS & O/BI & c \\
IGR~J17391-3021 & 17~~39~~11.58 & $-$30~~20~~37.6 & 358.07 & 0.445 & 1.4 & 4.5 & 30.0 & SFXT & 08Iab(f) & n2 \\
IGR~J17544-2619 & 17~~54~~25.28 & $-$26~~19~~52.6 & 3.26 & $-$0.336 & 1.4 & 7.8 & 1.4 & SFXT & O9Ib & p \\
IGR~J19140+0951 & 19~~14~~04.23 & +09~~52~~58.3 & 44.30 & $-$0.469 & 1.7 & 3.7 & 6.0 & OBS & B1I & n3 \\
\hline
\end{tabular}
\end{table}