Table 3: Best-fit parameters derived from the spectral analysis of the 58 stellar sources in the XMM-Newton Bright Serendipitous survey, with errors measured as the 90% confidence range.

Id.		 kT1 kT2 EM1/EM2 $Z/Z_\odot$ $N_{\rm H}$ $\chi^{2}$ Counts$^\dag $ Unabsorbed flux$^\ddag $

(XBSS $\dots$)		 (keV) (keV)     ( $\times 10^{21}$ cm-2) (d.o.f.)   ( $\times 10^{-13}$ erg cm-2 s-1)

J001002.4+110831		 $\rm0.98_{-0.11}^{+0.09}$ - - $\rm0.09_{-0.04}^{+0.05}$ $\rm0.34_{-0.34}^{+0.55}$ 1.25 (66) 828 $\rm 7.31_{-1.01}^{+1.13}$

J001051.6+105140**		 $\rm0.10_{-0.02}^{+0.01}$ $\rm 2.01_{-0.33}^{+0.62}$ 6.60 $\rm 1.33_{-0.36}^{+0.38}$ $\rm 2.12_{-0.40}^{+0.59}$ 0.69 (24) 69 $\rm0.84_{-0.00}^{+0.00}$

J001749.7+161952		 $\rm0.41_{-0.03}^{+0.04}$ - - $\rm 1.09_{-0.08}^{+0.08}$ $\rm0.00_{-0.00}^{+0.33}$ 0.85 (53) 890 $\rm 1.42_{-1.26}^{+0.14}$

J002953.1+044524		 $\rm0.23_{-0.04}^{+0.04}$ - - $\rm0.94_{-0.12}^{+0.13}$ $\rm 5.89_{-1.01}^{+1.03}$ 1.13 (29) 361 $\rm 9.25_{-8.40}^{+2.38}$

J005822.9-274016		 $\rm0.81_{-0.23}^{+0.19}$ - - $\rm0.04_{-0.03}^{+0.04}$ $\rm0.13_{-0.13}^{+1.11}$ 0.81 (36) 434 $\rm 1.35_{-0.41}^{+0.32}$

J012757.2+190000		 $\rm 1.00_{-0.13}^{+0.10}$ - - $\rm0.14_{-0.07}^{+0.11}$ $\rm0.00_{-0.00}^{+0.57}$ 1.13 (31) 391 $\rm 5.94_{-2.52}^{+0.15}$

J012757.3+185923		 $\rm0.75_{-0.05}^{+0.04}$ - - $\rm0.16_{-0.05}^{+0.07}$ $\rm0.25_{-0.25}^{+0.50}$ 0.94 (81) 1086 $\rm 18.73_{-3.18}^{+1.86}$

J014100.6-675328		 $\rm 10.19_{-1.08}^{+1.60}$ - - $\rm 1.14_{-0.36}^{+0.39}$ $\rm0.00_{-0.00}^{+0.03}$ 1.18 (328) 9567 $\rm 8.01_{-1.48}^{+2.75}$

J021830.0-045514		 $\rm0.34_{-0.06}^{+0.05}$ $\rm 1.16_{-0.02}^{+0.02}$ 1.27 $\rm0.16_{-0.03}^{+0.04}$ $\rm0.30_{-0.25}^{+0.29}$ 1.21 (226) 6044 $\rm 2.18_{-0.18}^{+0.34}$

J040744.6-710846		 $\rm0.99_{-0.16}^{+0.35}$ - - $\rm0.06_{-0.04}^{+0.07}$ $\rm0.05_{-0.05}^{+0.05}$ 1.16 (39) 323 $\rm0.70_{-0.22}^{+0.19}$

J040807.2-712702		 $\rm0.35_{-0.04}^{+0.07}$ $\rm0.95_{-0.06}^{+0.07}$ 1.29 $\rm0.11_{-0.02}^{+0.03}$ $\rm0.19_{-0.17}^{+0.36}$ 1.00 (215) 3222 $\rm 3.97_{-0.53}^{+0.61}$

J051617.1+794408*		 $\rm0.34_{-0.02}^{+0.03}$ $\rm0.92_{-0.05}^{+0.05}$ 0.91 $\rm0.13_{-0.02}^{+0.04}$ $\rm0.10_{-0.10}^{+0.24}$ 0.91 (332) 5170 $\rm 2.42_{-0.73}^{+0.05}$

J052048.9-454128		 $\rm0.40_{-0.06}^{+0.07}$ $\rm0.93_{-0.09}^{+0.09}$ 0.77 $\rm0.11_{-0.04}^{+0.06}$ $\rm0.00_{-0.00}^{+0.34}$ 0.94 (263) 3708 $\rm 4.47_{-0.33}^{+0.85}$

J052155.0-252200		 $\rm0.72_{-0.13}^{+0.10}$ - - $\rm0.23_{-0.14}^{+0.70}$ $\rm 3.37_{-1.16}^{+1.22}$ 0.75 (54) 220 $\rm 1.31_{-0.99}^{+0.27}$

J062425.7-642958		 $\rm0.47_{-0.19}^{+0.11}$ - - $\rm0.11_{-0.08}^{+0.54}$ $\rm 1.34_{-1.34}^{+3.21}$ 0.66 (35) 227 $\rm 1.73_{-1.14}^{+0.37}$

J074359.7+744057		 $\rm0.30_{-0.04}^{+0.05}$ $\rm 1.20_{-0.20}^{+0.40}$ 5.43 $\rm0.08_{-0.06}^{+0.10}$ $\rm 2.73_{-1.09}^{+1.06}$ 0.92 (65) 1430 $\rm 4.03_{-3.53}^{+0.01}$

J080309.8+650807		 $\rm0.50_{-0.03}^{+0.05}$ - - $\rm 1.45_{-0.14}^{+0.71}$ $\rm0.00_{-0.00}^{+0.80}$ 1.40 (59) 707 $\rm0.96_{-0.48}^{+0.13}$

J085427.8+584158		 $\rm0.61_{-0.08}^{+0.06}$ - - $\rm0.09_{-0.04}^{+0.06}$ $\rm0.00_{-0.00}^{+0.52}$ 0.71 (62) 945 $\rm 1.36_{-0.35}^{+0.21}$

J091043.4+054757		 $\rm 1.02_{-0.22}^{+0.26}$ - - $\rm0.04_{-0.03}^{+0.05}$ $\rm0.21_{-0.21}^{+0.73}$ 1.05 (74) 1235 $\rm 1.18_{-0.23}^{+0.26}$

J095955.2+251549		 $\rm 1.01_{-0.06}^{+0.05}$ - - $\rm0.12_{-0.03}^{+0.04}$ $\rm0.76_{-0.35}^{+0.21}$ 1.05 (114) 3214 $\rm 1.39_{-0.23}^{+0.21}$

J102044.1+081424		 $\rm0.33_{-0.03}^{+0.04}$ - - $\rm0.03_{-0.02}^{+0.03}$ $\rm 1.33_{-0.46}^{+0.45}$ 1.15 (48) 1117 $\rm 2.72_{-1.58}^{+0.34}$

J105131.1+573439		 $\rm0.32_{-0.08}^{+0.08}$ $\rm0.93_{-0.14}^{+0.18}$ 1.14 $\rm0.15_{-0.06}^{+0.20}$ $\rm0.05_{-0.05}^{+0.90}$ 0.94 (79) 1834 $\rm 1.02_{-0.53}^{+0.10}$

J110320.1+355803		 $\rm0.27_{-0.02}^{+0.02}$ $\rm0.71_{-0.06}^{+0.13}$ 4.18 $\rm0.06_{-0.01}^{+0.01}$ $\rm0.00_{-0.00}^{+0.01}$ 1.29 (391) 11147 $\rm 3.97_{-2.03}^{+1.92}$

J122751.2+333842		 $\rm0.26_{-0.03}^{+0.04}$ $\rm0.89_{-0.08}^{+0.09}$ 1.23 $\rm0.21_{-0.09}^{+0.26}$ $\rm0.00_{-0.00}^{+0.71}$ 0.70 (67) 1844 $\rm 1.01_{-0.77}^{+0.03}$

J122655.1+012002		 $\rm 1.08_{-0.31}^{+0.31}$ - - $\rm0.08_{-0.07}^{+0.16}$ $\rm0.00_{-0.00}^{+0.11}$ 0.80 (59) 708 $\rm0.33_{-0.26}^{+0.09}$

J122837.3+015720		 $\rm0.27_{-0.04}^{+0.03}$ $\rm 1.04_{-0.08}^{+0.10}$ 1.99 $\rm0.17_{-0.06}^{+0.08}$ $\rm 1.12_{-0.74}^{+1.30}$ 0.81 (135) 1857 $\rm 1.78_{-0.83}^{+0.34}$

J122942.3+015525		 $\rm0.29_{-0.06}^{+0.07}$ $\rm 1.03_{-0.10}^{+0.13}$ 0.90 $\rm0.35_{-0.14}^{+0.27}$ $\rm 1.94_{-1.13}^{+1.20}$ 0.96 (79) 1059 $\rm 1.72_{-0.78}^{+0.33}$

J123208.7+640304		 $\rm0.25_{-0.07}^{+0.10}$ $\rm 1.09_{-0.15}^{+0.23}$ 1.09 $\rm0.10_{-0.07}^{+0.24}$ $\rm0.28_{-0.28}^{+1.95}$ 0.85 (44) 534 $\rm0.64_{-0.40}^{+0.14}$

J123549.1-395026		 $\rm0.32_{-0.01}^{+0.01}$ $\rm0.90_{-0.04}^{+0.04}$ 1.73 $\rm0.19_{-0.04}^{+0.04}$ $\rm0.00_{-0.00}^{+0.27}$ 1.08 (216) 6004 $\rm 2.16_{-0.58}^{+0.19}$

J123600.7-395217*		 $\rm0.31_{-0.01}^{+0.01}$ $\rm 1.01_{-0.03}^{+0.02}$ 0.81 $\rm0.22_{-0.04}^{+0.04}$ $\rm0.00_{-0.00}^{+0.01}$ 1.42 (617) 34052 $\rm 14.05_{-3.64}^{+2.45}$

J124938.7-060444		 $\rm0.64_{-0.01}^{+0.01}$ $\rm 1.21_{-0.02}^{+0.02}$ 0.83 $\rm0.17_{-0.01}^{+0.01}$ $\rm0.01_{-0.01}^{+0.02}$ 1.15 (517) 40463 $\rm 22.39_{-1.46}^{+0.66}$

J133321.2+503102		 $\rm0.60_{-0.04}^{+0.04}$ - - $\rm0.09_{-0.02}^{+0.03}$ $\rm0.98_{-0.38}^{+0.41}$ 1.09 (170) 1190 $\rm 1.25_{-0.20}^{+0.24}$

J133626.9-342636		 $\rm0.98_{-0.41}^{+0.32}$ - - $\rm0.07_{-0.06}^{+0.15}$ $\rm0.03_{-0.03}^{+2.15}$ 0.48 (16) 466 $\rm0.51_{-0.35}^{+0.15}$

J134732.0+582103		 $\rm0.82_{-0.03}^{+0.03}$ - - $\rm0.06_{-0.01}^{+0.01}$ $\rm0.00_{-0.00}^{+0.15}$ 1.06 (177) 4120 $\rm 1.75_{-0.16}^{+0.15}$

J140219.6-110458		 $\rm0.44_{-0.12}^{+0.16}$ - - $\rm 1.11_{-0.94}^{+3.88}$ $\rm 2.76_{-1.68}^{+1.83}$ 1.02 (39) 491 $\rm 1.16_{-0.62}^{+0.18}$

J140936.9+261632		 $\rm0.35_{-0.06}^{+0.09}$ $\rm0.94_{-0.18}^{+0.17}$ 2.48 $\rm0.08_{-0.08}^{+0.06}$ $\rm0.29_{-0.29}^{+1.03}$ 1.04 (95) 2402 $\rm0.78_{-0.29}^{+0.13}$

J142800.1+424409		 $\rm0.28_{-0.05}^{+0.08}$ $\rm0.93_{-0.11}^{+0.12}$ 1.87 $\rm0.23_{-0.11}^{+0.36}$ $\rm 1.00_{-1.00}^{+2.07}$ 0.84 (90) 1226 $\rm 1.07_{-0.40}^{+0.18}$

J142901.2+423048		 $\rm0.49_{-0.08}^{+0.06}$ - - $\rm0.99_{-0.72}^{+4.00}$ $\rm0.00_{-0.00}^{+0.42}$ 1.15 (59) 805 $\rm0.70_{-0.66}^{+0.50}$

J143923.1+640912		 $\rm0.49_{-0.03}^{+0.02}$ - - $\rm 1.11_{-0.62}^{+3.89}$ $\rm0.01_{-0.01}^{+0.09}$ 1.35 (120) 2155 $\rm 1.61_{-1.35}^{+0.26}$

J153156.6-082610		 $\rm0.57_{-0.32}^{+0.08}$ - - $\rm0.11_{-0.04}^{+0.22}$ $\rm 1.07_{-0.98}^{+3.43}$ 0.87 (84) 909 $\rm0.88_{-0.82}^{+1.63}$

J162911.1+780442		 $\rm0.70_{-0.41}^{+0.20}$ - - $\rm0.04_{-0.02}^{+0.02}$ $\rm0.00_{-0.00}^{+0.92}$ 1.00 (21) 280 $\rm 1.13_{-0.88}^{+0.08}$

J162944.8+781128		 $\rm0.74_{-0.23}^{+0.16}$ - - $\rm0.10_{-0.08}^{+0.29}$ $\rm0.10_{-0.10}^{+2.27}$ 1.09 (9) 150 $\rm0.80_{-0.78}^{+0.19}$

J165313.3+021645		 $\rm0.64_{-0.05}^{+0.04}$ - - $\rm0.56_{-0.30}^{+4.43}$ $\rm0.09_{-0.09}^{+1.18}$ 0.93 (79) 1318 $\rm0.70_{-0.67}^{+0.15}$

J165710.5+352024**		 $\rm0.85_{-0.36}^{+0.28}$ - - $\rm0.08_{-0.07}^{+0.33}$ $\rm0.06_{-0.06}^{+3.11}$ 1.21 (7) 232 $\rm 1.24_{-0.60}^{+0.35}$

J205847.0-423704		 $\rm0.74_{-0.09}^{+0.06}$ - - $\rm0.14_{-0.06}^{+0.07}$ $\rm0.34_{-0.34}^{+0.57}$ 1.21 (72) 1096 $\rm0.71_{-0.31}^{+0.18}$

J212635.8-445046		 $\rm0.62_{-0.06}^{+0.05}$ - - $\rm0.11_{-0.04}^{+0.07}$ $\rm0.17_{-0.17}^{+0.78}$ 1.14 (78) 1899 $\rm 1.52_{-0.70}^{+0.31}$

J213840.5-424241		 $\rm0.47_{-0.14}^{+0.09}$ - - $\rm0.97_{-0.13}^{+0.13}$ $\rm0.00_{-0.00}^{+1.93}$ 0.97 (118) 1261 $\rm0.72_{-0.67}^{+0.06}$

J215323.7+173018		 $\rm 1.31_{-0.29}^{+0.48}$ - - $\rm0.14_{-0.11}^{+0.30}$ $\rm 1.05_{-1.05}^{+1.36}$ 0.98 (75) 507 $\rm0.69_{-0.21}^{+0.27}$
J221750.4-083210 $\rm0.23_{-0.04}^{+0.05}$ $\rm 1.09_{-0.22}^{+0.28}$ 3.61 $\rm0.71_{-0.12}^{+0.11}$ $\rm 2.44_{-1.59}^{+1.15}$ 0.99 (49) 546 $\rm 1.76_{-1.43}^{+0.09}$

J222852.2-050915		 $\rm0.52_{-0.07}^{+0.05}$ - - $\rm0.50_{-0.23}^{+1.92}$ $\rm0.36_{-0.36}^{+0.88}$ 1.04 (131) 1550 $\rm0.92_{-0.62}^{+0.18}$

J224833.3-511900		 $\rm0.30_{-0.03}^{+0.03}$ - - $\rm0.65_{-0.14}^{+0.13}$ $\rm 4.94_{-0.52}^{+0.73}$ 1.03 (26) 170 $\rm 2.41_{-2.26}^{+0.64}$

J224846.6-505929		 $\rm0.69_{-0.48}^{+0.14}$ - - $\rm0.09_{-0.07}^{+0.53}$ $\rm0.00_{-0.00}^{+2.48}$ 0.55 (20) 139 $\rm0.52_{-0.39}^{+0.16}$

J225349.6-172137**		 $\rm0.13_{-0.06}^{+0.05}$ - - $\rm 4.74_{-4.72}^{+0.26}$ $\rm 8.88_{-3.85}^{+8.46}$ 0.94 (20) 71 $\rm 61.89_{-61.85}^{+2.00}$

J230408.2+031820		 $\rm0.31_{-0.05}^{+0.09}$ $\rm0.91_{-0.09}^{+0.13}$ 1.48 $\rm0.15_{-0.05}^{+0.16}$ $\rm0.54_{-0.12}^{+0.17}$ 1.23 (81) 1936 $\rm 4.17_{-0.90}^{+0.69}$

J231541.2-424125		 $\rm0.47_{-0.07}^{+0.07}$ - - $\rm0.71_{-0.53}^{+4.29}$ $\rm0.19_{-0.19}^{+0.89}$ 1.08 (79) 862 $\rm0.69_{-0.63}^{+0.17}$

J231553.0-423800		 $\rm0.78_{-0.17}^{+0.26}$ - - $\rm0.02_{-0.01}^{+0.02}$ $\rm0.92_{-0.80}^{+0.79}$ 1.01 (70) 1247 $\rm0.73_{-0.21}^{+0.16}$

J233325.7-152240		 $\rm0.29_{-0.07}^{+0.08}$ $\rm0.97_{-0.02}^{+0.03}$ 2.41 $\rm0.09_{-0.02}^{+0.05}$ $\rm 1.09_{-0.60}^{+0.54}$ 1.31 (153) 2853 $\rm 2.35_{-0.91}^{+0.33}$

J235032.3+363156		 $\rm 1.13_{-0.14}^{+0.14}$ - - $\rm0.34_{-0.10}^{+0.09}$ $\rm0.00_{-0.00}^{+0.52}$ 0.77 (29) 152 $\rm 1.05_{-0.64}^{+0.24}$
$^\dag $ Total net counts in the EPIC (MOS + PN) chips.
$^\ddag $ Unabsorbed flux in 0.5-10 keV.
* For these sources, a 3T-model has been used to obtain an accurate fitting to the hard tail of their X-ray spectrum. The parameters of their third thermal component are a) XBSS J051617.1+794408 (HD 32558): kT3 = 4.32-2.50+3.28 keV, EM1/EM3 = 3.57 and b) XBSS J123600.7-395217 (CD-39 7717B, TWA 11B): kT3 = 2.39-0.15+0.16 keV, EM1/EM3 = 0.75.
** Problematic sources. The fitting in these stars is much less accurate due to the low number of counts in their spectra after background subtraction.


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