\begin{table}%t1
\caption{\label{tab:all}Photometric and spectroscopic information for individual~stars analysed in this work.}
\small%\centering
\par
\begin{tabular}{cccclcll}
\hline
\hline
ID &  $V$ &  ($B-V$) & ($U-B$) & SpT &  eqw4428 & $V_{\circ} - M_v$ & Cross ref. \\
\hline
CBN84332.2-455337 & 10.1 & 0.30 & --0.41 & B2IV &  0.60 &  11.1 & LS1132 \\
CBN84433.4-454115 & 10.4 & 0.23 & --0.47 & B2III &  0.85 & 12.5 & 2MASS 8443341-4541167\\
CBN84501.9-455034 & 10.4 & 0.18 & --0.45 & B2IV &  0.73 &  11.9 & CD-454491 \\
CBN84446.2-460433 & 10.7 & 0.08 & --0.49 & B3V &  0.60 & 11.2 & CD-454481 \\
CBN84324.0-460831 & 10.8 & 0.50 & --0.50 & O7.5V &  1.90 &  12.8 & LS1131$^{\blacktriangle}$ \\
CBN84447.2-455856 & 10.8 & 0.51 & --0.36 & 
WN8$^{\diamondsuit}$ &... & ... & LS1145\\
CBN84506.0-455008 & 10.9 & 0.25 & --0.35 &  B2V &  0.60 &  11.3 & CD-454493 \\
CBN84349.6-460711 & 10.9 & 0.34 & --0.61 &  O6.5V((f)) &  1.60 &  13.5 & LS1135$^{\varnothing}$ \\
CBN84447.4-460339 & 11.1 & 0.09 & --0.39 &  B3-5V &  0.70 &  11.4 & CD-454483 \\
CBN84510.4-455854 & 11.2 & 0.55 & --0.48 &  O9.5II  & 2.50 &  13.8 & CPD-452977 \\
CBN84504.8-460013 & 11.2 & 0.14 & --0.44 &  B2V &  0.70 &  12.2 & CD-454492 \\
CBN84406.6-455642 & 11.3 & 0.17 & --0.32 &  B2V &  0.80 &  12.2 & CD-454466? \\
CBN84424.9-455334 & 11.3 & 0.61 & --0.44 &  O7.5V & 1.90 &  12.9 & LS1144$^{\blacktriangle}$ \\
CBN84426.0-455749 & 11.4 & 0.25 & --0.16 &  B8V &  0.60 &  10.3 & CD-454473 \\
CBN84450.1-455648 & 11.4 & 0.16 & --0.51 &  B2V &  0.80 &  12.3 & CD-454484 \\
CBN84350.9-460348 & 11.4 & 0.45 & --0.49 &  O9-9.5V &  1.90 &  13.0 & LS1137 \\
CBN84506.3-460906 & 11.5 & 0.55 & --0.47 &  B0IIIe &  1.90 &  12.5: & LS1147$^{\blacktriangle}$ \\
CBN84543.1-460742 & 11.5 & 0.10 & --0.42 &  B2-3V &  0.40 &  12.4 & CPD-453000 \\
CBN84450.9-461012 & 11.6 & 0.47 & --0.48 &  B1III &  2.38 &  13.4 & LS1146$^{\blacktriangle}$ \\
CBN84404.4-455316 & 11.7 & 0.68 & --0.33 &  B0III &  2.27 &  13.2 & LS1140 \\
CBN84339.5-455148 & 11.7 & 0.54 & --0.14 &  B2III & 0.74 &  12.9 & CPD-452909 \\
CBN84518.6-454543 & 11.8 & 0.27 & --0.30 &  B2V &  0.48 &  12.4 & CPD-452984 \\
CBN84325.3-460750 & 11.8 & 0.25 & --0.05 &  B8-A0V  & 0.40 &  10.4 & CPD-452901 \\
CBN84552.3-460929 & 11.8 & 0.10 & --0.41 &  B5V &  0.44 &  12.1 & \\
CBN84359.6-460237 & 12.0 & 0.20 & --0.28 &  B5-8V  & 0.70 &  11.5 & CPD-452926 \\
CBN84338.5-460817 & 12.0 & 0.45 & --0.52 &  O9.5V  & 1.90 &  13.5 & CPD-452910 \\
CBN84349.4-454204 & 12.0 & 0.29 & --0.25 &  B3-5V  & ...  &  11.7 & CPD-452917 \\
CBN84443.0-455130 & 12.0 & 0.21 & --0.28 &  B8V &  0.50 &  11.0 & CPD-452953 \\
CBN84318.7-460742 & 12.2 & 0.24 & --0.19 &  B8V & ... &  11.1 & CPD-452895 \\
CBN84438.9-460746 & 12.2 & 0.10 & --0.36 &  B5V  & 0.50 &  12.4 & 2MASS 8443908-4607450 \\
CBN84327.7-460929 & 12.3 & 0.63 & --0.58 &  B0V-III  & 2.20 &  13.4 &2MASS 8432796-4609263 \\
CBN84348.6-460736 & 12.3 & 0.40 & --0.47 &  B1-1.5V  & 1.70 & 12.9 & 2MASS 8434879-4607337\\
CBN84434.3-455214 & 12.5 & 0.23 & --0.30 &  B5V &  1.40 &  12.3 & 2MASS 8443427-4552136\\
CBN84505.0-460300 & 12.6 & 0.16 & --0.37 &  B2.5-3V  & 0.40 &  12.9 & 2MASS 8450512-4602598\\
CBN84446.7-454632 & 12.6 & 0.46 & --0.09 &  B3-5V  & 0.40 &  11.8 & 2MASS 8444674-4546333\\
CBN84327.4-460240 & 12.6 & 0.56 & --0.44 &  B0V &  1.60 &  13.4 & 2MASS 8432763-4602382\\
CBN84500.4-455834 & 12.6 & 0.24 & --0.34 &  B5V &  0.70 &  12.3 & 2MASS 8450044-4558343\\
CBN84505.7-454040 & 12.7 & 0.60 & --0.31 &  B1III  & 2.60 &  14.0 & 2MASS 8450573-4540420\\
CBN84526.1-460527 & 12.9 & 0.66 & --0.09 &  B2III  & 2.10 &  13.8 & 2MASS 8452620-4605258\\
CBN84350.7-455820 & 12.9 & 0.55 & --0.34 &  B1.5V  & 2.60 &  12.5 & 2MASS 8435084-4558194\\
CBN84344.7-460656 & 12.9 & 0.43 & --0.44 &  B1V &  1.90 &  13.5 & 2MASS 8434493-4606537\\
CBN84522.4-455527 & 13.0 & 0.72 & --0.24 &  B1III  & 2.60 &  13.9 & 2MASS 8452244-4555280\\
CBN84502.0-455257 & 13.2 & 0.23 & --0.11 &  B8-A0V  & 0.70 &  11.8 & 2MASS 8450219-4552572\\
CBN84410.6-455452 & 13.3 & 0.37 & --0.08 &  B5-8V  & 0.80 &  12.2 & 2MASS 8441074-4554522\\
CBN84419.9-455552 & 13.5 & 0.65 & --0.08 &  B2III  & 2.90 &  14.3 & 2MASS 8441999-4555524\\
CBN84458.5-455242 & 13.5 & 0.24 & --0.11 &  B8-9V  & ...  &  12.3 & 2MASS 8445857-4552434\\
CBN84431.5-455314 & 13.5 & 0.61 & --0.34 &  B2III:  & 2.36: &  14.3: & 2MASS 8443163-4553148\\
CBN84518.2-455816 & 13.6 & 0.65 & --0.32 &  B0.5V  & 3.00 &  14.1 & 2MASS 8451822-4558166\\
CBN84423.1-460821 & 13.7 & 0.65 & --0.33 &  B1-2/V-III  & 1.80 &  14.0 & \\
CBN84325.6-460820 & 13.7 & 0.62 & --0.34 &  B2Ve &  2.00 &  14.5: & 2MASS 8432574-4608174\\
CBN84421.9-455136 & 13.7 & 0.66 & --0.24 &  B1V &  3.48 & 13.9 & \\
CBN84437.8-455257 & 13.8 & 0.43 & --0.32 &  B8-A0V  & 0.30 &  11.8 & 2MASS 8443788-4555288\\
CBN84510.9-455900 & 14.0 & 0.61 & --0.31 &  B1V &  2.32  &  14.2 & \\
CBN84442.0-460802 & 14.1 & 0.51 & --0.14 &  B2V &  1.10 &  14.0 & 2MASS 8444210-4608004\\
CBN84346.7-460641 & 14.2 & 0.37 & --0.43 &  B1-5V  & 2.20 & 14.2 & 2MASS 8434686-4606390 \\
CBN84430.9-455442 & 14.2 & 0.53 & --0.30 &  B2V &  1.77 &  14.1 & \\
CBN84523.5-455340 & 14.3 & 0.51 & --0.06 &  B8V &  1.80 & 12.4 & 2MASS 8452359-4553411\\
CBN84416.7-461121 & 14.3 & 0.53 & --0.25 &  B1.5V  & 1.90 &  14.2 & 2MASS 8441683-4611189\\
\hline
CBN84423.2-455337 & 14.5 & 0.58 & --0.24 &  B1.5-2V  & 1.15 &  14.1 & 2MASS 8442335-4553371\\
CBN84418.2-455307 & 14.6 & 0.56 & --0.32 &  B1V &  1.30 &  14.7 & 2MASS 8441838-4553078\\
CBN84414.0-455733 & 14.7 & 0.76 & --0.16 &  B1.5-2V  & 1.90 & 13.9 & 2MASS 8441413-4557329\\
CBN84421.9-460125 & 14.8 & 0.49 & --0.27 &  B1V &  2.00 &  15.2 & 2MASS 8442208-4610224\\
CBN84518.8-454147 & 14.8 & 0.57 & --0.13 &  B5V &  0.87 &  13.3 & 2MASS 8451888-4541494\\
CBN84527.2-455360 & 14.9 & 0.49 & +0.01  &  B5-8V  & 1.14 &  13.5 & 2MASS 8452725-4554006\\
\hline
\end{tabular} 
\smallskip
$^{\diamondsuit}$ van der Hucht (2001).\\
 Column 1 lists
the~stars' identification according to the guidelines of the IAU,
i.e., using the (capitalized) first letters of the last names of the authors 
and the numbers, of the celestial coordinates in the J2000.0 frame.
Columns~2 to~4~list the {\it UBV}~magnitude and colours; the 
 MK spectral classification
is listed in Col.~5. The $\lambda$4428 equivalent width is
showed in~\AA\ in Col.~6. Column~7 shows the spectrophotometric
distance modulus determined adopting the absolute magnitudes
corresponding to the spectral types, according to the calibration by \citet{Martins}
for O~spectral types and \citet{Landolt} for B~spectral types. Column~8
 includes the cross reference for these~stars, where LS~indicates~stars in the Luminous Star
Catalogue \citep{Step}, CD indicates~stars in the
 C\'ordoba Durchmusterung catalogue, CPD indicates~stars in the
 Cape Photographic Durchmusterung catalogue, and 2MASS indicates~stars in the
2MASS catalogue \citep{Cutri}.
\end{table}