Table 1: Main characteristics of the 24 brightest sources. The sources are sorted by decreasing count number.
(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) ($^{\circ}$ ' '')     (1021 cm-2) (-/keV)   (arcsec) (mag) (log10) CLASS

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) $\rm0.7^{+0.4}_{-0.4}$ $\rm 1.90^{+0.12}_{-0.13}$ 1.17 1.5 20.00 0.90 ?
128 12 06 58.63 -52 21 26.1 2388 wabs(mekal) $\rm 1.3^{+0.7}_{-0.6}$ $\rm0.61^{+0.03}_{-0.03}$ 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) $\rm0.8^{+0.6}_{-0.6}$ $\rm 2.03^{+0.22}_{-0.22}$ 1.47 - >22 >1.49 AGN (?)
319 12 08 56.96 -52 30 10.1 1109 wabs(brem) $\rm 2.1^{+2.0}_{-1.2}$ $\rm0.33^{+0.16}_{-0.13}$ 1.40 1.8 13.82 -2.21 STAR (?)
509 12 10 07.06 -52 35 54.2 1056 wabs(pow) $\rm0.8^{+0.5}_{-0.6}$ $\rm 1.78^{+0.17}_{-0.19}$ 1.25 1.2 19.06 0.29 AGN (?)
323 12 09 13.68 -52 30 19.8 1000 wabs(pow) $\rm0.5^{+0.6}_{-0.5}$ $\rm 1.84^{+0.20}_{-0.28}$ 0.91 - >22 >1.26 ?
190 12 11 13.66 -52 25 30.7 984 wabs(brem) $\rm 3.1^{+2.4}_{-1.3}$ $\rm0.30^{+0.13}_{-0.11}$ 2.35 2.9 14.22 -2.02 ?
        wabs(bbody) $\rm 1.5^{+2.1}_{-0.5}$ $\rm0.17^{+0.04}_{-0.03}$ 2.39 2.9 14.22 -2.02 ?
125 12 08 42.36 -52 21 26.6 927 wabs(pow) $\rm0.1^{+0.6}_{-0.1}$ $\rm 1.75^{+0.20}_{-0.22}$ 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) $\rm 1.8^{+1.4}_{-1.0}$ $\rm0.40^{+0.13}_{-0.13}$ 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) $\rm 3.3^{+2.8}_{-1.5}$ $\rm0.27^{+0.12}_{-0.11}$ 1.46 0.7 16.56 -1.40 ?
        wabs(bbody) $\rm 1.5^{+2.3}_{-0.6}$ $\rm0.17^{+0.03}_{-0.05}$ 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) $\rm0.8^{+0.9}_{-0.8}$ $\rm 2.15^{+0.25}_{-0.28}$ 0.91 - >22 >0.90 ?
        wabs(bremss) $\rm0.0^{+0.6}_{-0.0}$ $\rm 3.20^{+1.81}_{-1.20}$ 0.97 - >22 >0.87 ?
        wabs(mekal) $\rm0.0^{+0.3}_{-0.0}$ $\rm 4.02^{+1.72}_{-1.01}$ 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) $\rm 3.8^{+1.6}_{-1.7}$ $\rm0.51^{+0.09}_{-0.15}$ 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) $\rm 2.4^{+2.2}_{-1.4}$ $\rm0.46^{+0.23}_{-0.18}$ 1.88 1.3 16.25 -1.54 ?
        wabs(bbody) $\rm0.6^{+2.1}_{-0.6}$ $\rm0.23^{+0.05}_{-0.06}$ 1.92 1.3 16.25 -1.54 ?
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  $N_{\rm H}=1.28$ $\times$ 1021 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.


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