\begin{table}%T3
\caption{\label{catalog1}A subset
 of blue massive stars showing a variety of spectral types (O-, B-, A-types plus WRs and LBV candidates, LBVc) 
observed in NGC~55.} 
\small
%\centerline
{
\begin{tabular}{ccccclccccl}
\hline\hline
{ID}  & { RA(J2000)} &  {Dec(J2000)}  &  {$V$}  &  {$V-I$}  & {Spectral type} & {$Rg$} & {$v_{\rm r}$}  &  {$S/N$}   &  {Metallicity}  &  {Comments}  \\
 {(1)}  & {(2)} &  {(3)}  &  {(4)}  &  {(5)}  & {(6)} & {(7)} & {(8)} &  {(9)}  &  {(10)}  &  {(11)}  \\
\hline
 {   D\_36}  &  {  0:14:35.07}  &  {--39:11:20.04}  &  {19.189}  &  {--0.689}  &  {        B9I}  &  { --278.26}  &  {  78}  &  {  70}  &  {     LMC}  &  {  	  }  \\
 {   C2\_8}  &  {  0:14:43.87}  &  {--39:12:29.51}  &  {19.294}  &  {--0.652}  &  {        A0I}  &  { --147.56}  &  {  95}  &  {  69}  &  {     SMC}  &  {  	  }  \\
 {  C1\_18}  &  {  0:14:55.94}  &  {--39:11:21.84}  &  {19.316}  &  {--0.707}  &  {        WN8}  &  {  --37.95}  &  { 124}  &  {  30}  &  {--}  &  {  	      neb.}  \\
 {  C1\_30}  &  {  0:14:59.91}  &  {--39:12:11.88}  &  {18.921}  &  {--0.425}  &  {       LBVc}  &  {   95.62}  &  { 158}  &  {  28}  &  {--}  &  {              }  \\
 {  C1\_37}  &  {  0:15:02.50}  &  {--39:13:58.44}  &  {19.642}  &  {--0.588}  &  {       A7II}  &  {  153.43}  &  { 146}  &  {  55}  &  {--}  &  {  		  }  \\
 {  C1\_51}  &  {  0:15:14.70}  &  {--39:12:54.36}  &  {18.306}  &  {--0.098}  &  {   Ofpe/WN9}  &  {  319.21}  &  { 187}  &  {  57}  &  {--}  &  {  	      neb.}  \\
 {   B\_12}  &  {  0:15:16.68}  &  {--39:13:26.40}  &  {19.108}  &  {--0.666}  &  {      Of/WN}  &  {  351.60}  &  { 176}  &  {  90}  &  {--}  &  {  	      neb.}  \\
 {   B\_13}  &  {  0:15:18.63}  &  {--39:13:12.72}  &  {18.543}  &  {--0.435}  &  {  LBVc/WN11}  &  {  379.26}  &  { 274}  &  { 103}  &  {--}  &  {              }  \\
 {   B\_34}  &  {  0:15:37.73}  &  {--39:13:49.08}  &  {19.533}  &  {--0.242}  &  {  LBVc/WN11}  &  {  667.26}  &  { 216}  &  {  35}  &  {--}  &  {              }  \\
 {   B\_36}  &  {  0:15:40.62}  &  {--39:13:40.07}  &  {19.782}  &  {--0.389}  &  {        O8I}  &  {  709.64}  &  { 171}  &  {  55}  &  {--}  &  {  		  }  \\
 {    A\_5}  &  {  0:15:40.83}  &  {--39:15:09.72}  &  {20.071}  &  {--0.495}  &  {        A3I}  &  {  722.43}  &  { 260}  &  {  58}  &  {--}  &  {  		  }  \\
 {    A\_8}  &  {  0:15:44.18}  &  {--39:14:58.20}  &  {19.792}  &  {--0.188}  &  {      O9.7I}  &  {  770.70}  &  { 304}  &  {  62}  &  {--}  &  {  		  }  \\
 {   A\_11}  &  {  0:15:45.17}  &  {--39:15:56.15}  &  {18.706}  &  {--0.245}  &  {        B5I}  &  {  793.59}  &  { 209}  &  { 130}  &  {     LMC}  &  {          }  \\
 {   A\_29}  &  {  0:15:57.97}  &  {--39:15:33.84}  &  {19.575}  &  {--0.595}  &  {      O5If+}  &  {  980.35}  &  { 210}  &  {  62}  &  {--}  &  {  	     neb. }  \\
 {   A\_34}  &  {  0:16:01.17}  &  {--39:16:34.67}  &  {20.247}  &  {--0.875}  &  {        B0I}  &  { 1036.66}  &  { 215}  &  {  68}  &  {     LMC}  &  {          }  \\
 {   A\_42}  &  {  0:16:09.69}  &  {--39:16:13.44}  &  {19.453}  &  {--0.189}  &  {       LBVc}  &  { 1160.17}  &  { 175}  &  {  75}  &  {--}  &  {              }  \\
\hline 
\end{tabular}}
 \smallskip
Note~1. The complete catalogue is gathered in Table~\ref{t_catalog}, available in the online material.
\end{table}