\begin{table}%ta2
\par
      \caption{\label{table.the42s.simbad}USNO-B1 stars towards $\sigma$~Orionis with  
      $\mu_{\rm USNO-B1} > 40$~mas~a$^{-1}$, $J_{\rm 2MASS} < 15.5$~mag,
      and $N_{\rm USNO-B1} > 3$: alternative names and cluster membership
      status.}   
         \small%\centering
\par
         \begin{tabular}{c l cccl l l}
            \hline
            \hline
            \noalign{\smallskip}
No.					&
Alternative				&
[SE2004]				&
[SWW2004]				&
[HHM2007]				&
Discarded\tablefootmark{a}				&
Previous				&
Current					\\ 
	& 
name  					& 
  					& 
  					& 
  					& 
  					& 
member\tablefootmark{b}  				& 
member\tablefootmark{b}				\\ 
            \hline 
01      & ...						& ...	& ...	& ...	& {\em This work}	& Unknown	& No	\\ % 
02      & ...						& ...	& ...	& ...	& {\em This work}	& Unknown	& No	\\ % 
03      & ...						& ...	& ...	& ...	& {\em This work}	& Unknown	& No	\\ % 
04      & ...						& ...	& ...	& ...	& {\em This work}	& Unknown	& No	\\ % 
05      & \object{2MASS J05394761--0258593}		& ...	& ...	& ...	& Ca08			& No		& No	\\ % 
06      & \object{SO411068}				& ...	& 202	& ...	& Ca06			& No		& No	\\ % 
07      & \object{SO441143}				& ...	& ...	& ...	& Ca06			& No		& No	\\ % 
08      & ...						& ...	& ...	& ...	& {\em This work}	& Unknown	& No	\\ % 
09      & ...						& ...	& ...	& ...	& {\em This work}	& Unknown	& No	\\ % 
10      & \object{[KJN2005] 38} 			& ...	& ...	& ...	& Ke05			& No		& No	\\ % 
11      & \object{[SWW2004] J053849.560--024526.94}	& ...	& 101	& 753	& Sa08			& No		& No	\\ % 
12      &  ...  					& ...	& ...	& ...	& {\em This work}	& Unknown	& No	\\ % 
13      & \object{[SWW2004] J053756.467-024357.36}	& ...	& 116	& 260	& {\em This work}	& Yes?		& No	\\ % 
14      & \object{2MASS J05403667--0243469}		& ...	& ...	& ...	& Ca08			& No		& No	\\ % 
15      & \object{SO430116}				& ...	& ...	& ...	& Ca06			& No		& No	\\ % 
16      & \object{[SWW2004] J053855.425--024129.68}	& ...	& 71	& 804	& Sa08			& No		& No	\\ % 
17      & \object{[SWW2004] J053705.004--024103.43}	& ...	& 218	& ...	& {\em This work}	& Yes?		& No	\\ % 
18      & \object{[SWW2004] J053805.676--024019.36}	& ...	& 88	& 330	& Sa08			& No		& No	\\ % 
19      &  ...  					& ...	& ...	& ...	& {\em This work}	& Unknown	& No	\\ % 
20      & ...						& ...	& ...	& ...	& {\em This work}	& Unknown	& No	\\ % 
21      & \object{[HHM2007] 1354}			& ...	& ...	& 1354	& {\em This work}	& Yes?		& No	\\ % 
22      & \object{[SWW2004] J053723.067--023246.38}	& ...	& 215	& 27	& {\em This work}	& No?		& No	\\ % 
23      & ...						& ...	& ...	& ...	& {\em This work}	& Unknown	& No	\\ % 
24      & \object{G 99--20}				& ...	& ...	& 74	& Gi61$^{c}$		& No		& No	\\ % 
25      & ...						& ...	& ...	& ...	& {\em This work}	& Unknown	& No	\\ % 
26      & \object{2MASS J05391564--0229568}		& ...	& ...	& 961	& Ca08			& No		& No	\\ % 
27      & \object{[HHM2007] 544}			& ...	& ...	& 544	& {\em This work}	& Yes?		& No	\\ % 
28      & ...						& ...	& ...	& ...	& {\em This work}	& Unknown	& No	\\ % 
29      & ...						& ...	& ...	& ...	& {\em This work}	& Unknown	& No	\\ % 
30      & \object{SO120908}				& ...	& ...	& ...	& Ca06			& No		& No	\\ % 
31      & \object{[SE2004] 42}  			& 42	& 204	& ...	& Ke05			& No		& No	\\ % 
32      & \object{Mayrit 999306}			& ...	& ...	& 209	& ...			& Yes?  	& Yes?  \\ % 
33      & \object{[KJN2005] 12} 			& ...	& ...	& ...	& Ke05\tablefootmark{d}		& No		& No	\\ % 
34      & \object{SO241003}				& ...	& ...	& 52	& Ca06			& No		& No	\\ % 
35      & ...						& ...	& ...	& ...	& {\em This work}	& Unknown	& No	\\ %
36      & \object{Mayrit 1493050}			& 122	& ...	& 1323	& ...			& Yes  		& Yes  	\\ % 
37      & \object{[SWW2004] J053941.738--021946.22}	& ...	& 206	& ...	& {\em This work}	& Yes?		& No	\\ % 
38      & ...						& ...	& ...	& ...	& {\em This work}	& Unknown	& No	\\ %
39      & \object{[SWW2004] J053725.220--021604.56}	& ...	& 201	& ...	& {\em This work}	& Yes?		& No	\\ % 
40      & \object{[SE2004] 57}  			& 57	& ...	& ...	& Ke05			& No		& No	\\ % 
41      & \object{[SE2004] 112} 			& 112	& ...	& ...	& {\em This work}	& Yes?		& No	\\ % 
42      & \object{Mayrit 1610344}			& 6	& 228	& ...	& ...			& Yes?  	& Yes?  \\  	
            \hline
         \end{tabular}
   \tablefoot{\tablefoottext{a}{Work in which the cluster membership of the object was firstly
discarded:  
Gi61, Giclas et~al. (1961); Ke05, Kenyon et~al. (2005); Ca06, Caballero (2006); Ca08,
Caballero (2008c); Sa08, Sacco et~al. (2008).}\\
\tablefoottext{b}{``Yes'': confirmed cluster member with signatures of youth -- 
``Yes?'': cluster member candidate based on photometry -- 
``No?'': probable non-cluster member based on photometry --
``No'': non-cluster member based on spectroscopy, photometry or proper motion --
``Unknown'': firtsly presented in this paper.}\\
\tablefoottext{c}{Actually, in 1961, the existence of the $\sigma$~Orionis cluster 
had not been brought up yet.} \\
\tablefoottext{d}{There is independent spectroscopic confirmation of cluster
non-membership of the star No.~33, for which Sacco et~al. (2008) measured
lithium, radial velocity, low gravity, and H$\alpha$ features inconsistent with
membership.} } 
   \end{table}