\begin{table}%t1
\caption{Main characteristics of the 24~brightest sources. The sources are sorted by decreasing count number.}\label{sources}
%\centerline

\begin{tabular}{cccccccccccc} 
\hline \hline
 (1)	& (2)		& (3)		& (4)	& (5)		& (6)			& (7)			& (8)			& (9)		& (10)			& (11)			& (12)		\\
SRC	& RA (J2000)	& Dec (J2000)	& cts	& Model		& $N_{\rm H}$		& $\Gamma$/kT		& $\chi_{\nu}^{2}$	& $D_{\rm XO}$	& $F$			& $\frac{f_{\rm X}}{f_{F}}$	& SUGGESTED		\\
	& (hms)	& ($^{\circ}$ $'$ $''$)	&	&		& (10$^{21}$ cm$^{-2}$)	& ($-$/keV)		&			& (arcsec)	& (mag)			& (log$_{10}$)		&	CLASS	\\ 
\hline
\noalign{\smallskip}
335	& 12 11 01.37	& $-$52 30 30.6	& 4229	& wabs(pow)	& $\rm 1.8^{+0.4}_{-0.4}$	& $\rm 1.95^{+0.14}_{-0.13}$	& 1.03			& 1.3, 3.1, 3.1, 3.5	& 20.36, 20.34, 19.35, 19.46	& 1.39, 1.38, 0.99, 1.03	& AGN		\\ 
183	& 12 09 41.88	& $-$52 24 56.9	& 3848	& 
wabs(pow)	& $\rm 0.7^{+0.4}_{-0.4}$	& $\rm 1.90^{+0.12}_{-0.13}$	& 1.17			& 1.5 		& 20.00			& 0.90			& ?		\\ 
128	& 12 06 58.63	& $-$52 21 26.1	& 2388	& wabs(mekal)	& $\rm 1.3^{+0.7}_{-0.6}$	& $\rm 0.61^{+0.03}_{-0.03}$	& 1.42			& 1.8		& 10.53			& $-$3.20			& STAR		\\ 
289	& 12 09 06.02	& $-$52 29 16.8	& 1499	& wabs(pow)	& $\rm 1.3^{+0.5}_{-0.5}$	& $\rm 2.00^{+0.16}_{-0.17}$	& 0.77			& 1.2		& 19.83			& 0.57			& AGN		\\ 
95	& 12 06 41.23	& $-$52 20 25.1	& 1332	& wabs(pow)	& $\rm 0.8^{+0.6}_{-0.6}$	& $\rm 2.03^{+0.22}_{-0.22}$	& 1.47			& $-$		& $>$22			& $>$1.49		& AGN (?)	\\ 
319	& 12 08 56.96	& $-$52 30 10.1	& 1109	& wabs(brem)	& $\rm 2.1^{+2.0}_{-1.2}$	& $\rm 0.33^{+0.16}_{-0.13}$	& 1.40			& 1.8		& 13.82			& $-$2.21			& STAR (?)	\\ 
509	& 12 10 07.06	& $-$52 35 54.2	& 1056	& wabs(pow)	& $\rm 0.8^{+0.5}_{-0.6}$	& $\rm 1.78^{+0.17}_{-0.19}$	& 1.25			& 1.2		& 19.06			& 0.29			& AGN (?)	\\ 
323	& 12 09 13.68	& $-$52 30 19.8	& 1000	& wabs(pow)	& $\rm 0.5^{+0.6}_{-0.5}$	& $\rm 1.84^{+0.20}_{-0.28}$	& 0.91			& $-$		& $>$22			& $>$1.26		& ?		\\
190	& 12 11 13.66	& $-$52 25 30.7	& 984	& wabs(brem)	& $\rm 3.1^{+2.4}_{-1.3}$	& $\rm 0.30^{+0.13}_{-0.11}$	& 2.35			& 2.9		& 14.22			& $-$2.02			& ?		\\
	& 		& 		& 	& wabs(bbody)	& $\rm 1.5^{+2.1}_{-0.5}$	& $\rm 0.17^{+0.04}_{-0.03}$	& 2.39			& 2.9		& 14.22			& $-$2.02			& ?		\\
125	& 12 08 42.36	& $-$52 21 26.6	& 927	& wabs(pow)	& $\rm 0.1^{+0.6}_{-0.1}$	& $\rm 1.75^{+0.20}_{-0.22}$	& 1.01			& 3.1		& 18.9			& 0.14			& ?		\\ 
530	& 12 09 58.87	& $-$52 36 19.4	& 789	& wabs(pow)	& $\rm 1.6^{+0.9}_{-0.9}$	& $\rm 1.80^{+0.24}_{-0.24}$	& 0.93			& 2.9, 3.3		& 17.26, 16.95		& $-$0.52, $-$0.64		& AGN		\\ 
220	& 12 10 17.09	& $-$52 27 06.5	& 769	& wabs(brem)	& $\rm 1.8^{+1.4}_{-1.0}$	& $\rm 0.40^{+0.13}_{-0.13}$	& 1.01			& 3.7		& 15.42			& $-$1.81			& STAR (?)	\\ 
108	& 12 09 54.74	& $-$52 21 05.4	& 759	& wabs(pow)	& $\rm 1.1^{+0.9}_{-1.0}$	& $\rm 2.02^{+0.42}_{-0.29}$	& 0.82			& 2.4, 4.8		& 17.27, 18.91		& $-$0.90, $-$0.24		& AGN (?)	\\ 
72	& 12 10 18.05	& $-$52 19 09.1	& 746	& wabs(brem)	& $\rm 3.3^{+2.8}_{-1.5}$	& $\rm 0.27^{+0.12}_{-0.11}$	& 1.46			& 0.7		& 16.56			& $-$1.40			& ?		\\
	& 		& 		& 	& wabs(bbody)	& $\rm 1.5^{+2.3}_{-0.6}$	& $\rm 0.17^{+0.03}_{-0.05}$	& 1.45			& 0.7		& 16.56			& $-$1.39			& ?		\\ 
285	& 12 10 57.10	& $-$52 29 04.6	& 738	& wabs(mekal)	& $\rm 6.9^{+3.4}_{-2.7}$	& $\rm 4.33^{+3.84}_{-1.56}$	& 1.03			& 1.6, 2.8, 3.7	& 19.83, 20.43, 18.67	& +0.58, +0.82, +0.11	& ?		\\
	&		&		&	& wabs(pow)	& $\rm 7.2^{+3.7}_{-2.3}$	& $\rm 1.95^{+0.40}_{-0.29}$	& 1.15			& 1.6, 2.8, 3.7	& 19.83, 20.43, 18.67	& +0.59, +0.83, +0.12	& ?		\\
	&		& 		&	& wabs(bremss)	& $\rm 5.8^{+2.7}_{-1.9}$	& $\rm 5.35^{+5.45}_{-1.98}$	& 1.15			& 1.6, 2.8, 3.7	& 19.83, 20.43, 18.67	& +0.55, +0.79, +0.09	& ?		\\ 
434	& 12 09 27.05	& $-$52 33 25.2	& 736	& wabs(pow)	& $\rm 1.4^{+0.8}_{-1.0}$	& $\rm 2.39^{+0.40}_{-0.31}$	& 1.71			& $-$		& $>$22			& $>$1.11		& AGN (?)	\\ 
491	& 12 09 36.12	& $-$52 35 14.3	& 674	& wabs(pow)	& $\rm 1.4^{+1.0}_{-1.1}$	& $\rm 1.93^{+0.37}_{-0.29}$	& 1.09			& $-$		& $>$22			& $>$1.22		& AGN		\\
423	& 12 09 06.94	& $-$52 33 08.6	& 671	& wabs(pow)	& $\rm 2.1^{+1.2}_{-1.1}$	& $\rm 2.18^{+0.30}_{-0.35}$	& 0.54			& 1.2		& 19.72			& +0.26			& AGN		\\
181	& 12 09 50.88	& $-$52 25 24.2	& 669	& wabs(pow)	& $\rm 0.8^{+0.9}_{-0.8}$	& $\rm 2.15^{+0.25}_{-0.28}$	& 0.91			& $-$		& $>$22			& $>$0.90		& ?		\\
	&		&		&	& wabs(bremss)	& $\rm 0.0^{+0.6}_{-0.0}$	& $\rm 3.20^{+1.81}_{-1.20}$	& 0.97			& $-$		& $>$22			& $>$0.87		& ?		\\
	&		&		&	& wabs(mekal)	& $\rm 0.0^{+0.3}_{-0.0}$	& $\rm 4.02^{+1.72}_{-1.01}$	& 0.99			& $-$		& $>$22			& $>$0.91		& ?		\\
294	& 12 09 35.18	& $-$52 29 36.6	& 650	& wabs(bremss)	& $\rm 2.3^{+2.0}_{-1.3}$	& $\rm 3.13^{+2.72}_{-1.29}$	& 0.61			& $-$		& $>$22			& $>$0.90		& ?		\\
	&		&		&	& wabs(pow)	& $\rm 3.7^{+2.8}_{-1.6}$	& $\rm 2.26^{+0.59}_{-0.39}$	& 0.65			& $-$		& $>$22			& $>$0.93		& ?		\\ 
127	& 12 10 28.87	& $-$52 21 45.7	& 560	& ?		& $-$			& $-$			& $-$			& 1.3		& 14.93			& $-$1.80			& ?		\\
198	& 12 10 39.72	& $-$52 25 36.8	& 548	& wabs(mekal)	& $\rm 3.8^{+1.6}_{-1.7}$	& $\rm 0.51^{+0.09}_{-0.15}$	& 1.68			& 1.6		& 11.77			& $-$3.39			& ?		\\
57	& 12 09 44.83	& $-$52 18 26.8	& 532	& wabs(pow)	& $\rm 1.7^{+1.2}_{-1.3}$	& $\rm 1.92^{+0.50}_{-0.32}$	& 1.00			& $-$		& $>$22		& $>$+1.00		& AGN		\\
231	& 12 08 50.40	& $-$52 27 37.4	& 490	& wabs(bremss)	& $\rm 2.4^{+2.2}_{-1.4}$	& $\rm 0.46^{+0.23}_{-0.18}$	& 1.88			& 1.3		& 16.25			& $-$1.54			& ?		\\
	&		&		&	& wabs(bbody)	& $\rm 0.6^{+2.1}_{-0.6}$	& $\rm 0.23^{+0.05}_{-0.06}$	& 1.92			& 1.3		& 16.25			& $-$1.54			& ?		
\\ 
\hline
\end{tabular}
\medskip
Column~(1):  source ID number;  Cols.~(2) and~(3):  source celestial coordinates; Col.~(4):  source total counts (in the energy range 0.3--8~keV);  Col.~(5):  best-fit emission model(s); the symbol~"?''  indicates that none of the tested single-component models provided an~acceptable fit;  Col.~(6):  best-fit hydrogen column density, with the relevant 90\%~confidence level error for two~interesting parameters ($\Delta \chi^2=4.61$);  Col.~(7):  best-fit photon-index or plasma temperature, in the case of either a~power-law or a~thermal emission model, respectively; also the relevant 90\%~confidence level error for two~interesting parameters ($\Delta
\chi^2=4.61$) is reported;  Col.~(8):  best-fit reduced chi-squared;  Col.~(9):  projected sky
distance, from the X-ray position, of the candidate optical counterpart (if any);  Col.~(10):  $F$~magnitude of the optical candidate counterpart; we consider $F>$ 22 if no candidate counterpart is found within a~5$''$~radius X-ray error circle;  Col.~(11):  logarithmic values of the
X-ray-to-optical flux ratio; the optical flux is based on the $F$~magnitude; the X-ray flux is
based on the best-fit model or, when no model is acceptable, on a~power-law spectrum with
photon-index $\Gamma$~= 1.75 and hydrogen column density~$N_{\rm H}=1.28$~$\times$ $10^{21}$~cm$^{-2}$, corresponding to the total galactic column density;  Col.~(12):  proposed source classification; the symbol~"?''  after it means that the reported identification is uncertain, due to the $N_{\rm H}$~value; the only symbol~"?''  indicates that no classification can be suggested.
\end{table}