\begin{table}%T3
%\scriptsize
%%\begin{center}
\par
\caption{Summary of cross-correlation with the \object{M~31}\ catalogue of 
the first (July 1991) and second (August 1992) ROSAT PSPC survey 
(SSHP97, SHL2001). ROSAT sources, not detected in our \xmm\ analysis, 
are arranged according to detection likelihood (LH) levels.}
\label{rosat}
%\centerline
 {
\begin{tabular}{lll}
\hline
\hline\noalign{\smallskip}
\multicolumn{1}{c}{} & 
\multicolumn{1}{c}{SSHP97 source numbers} &
\multicolumn{1}{c}{SHL2001 source numbers} \\ 
\noalign{\smallskip}\hline\noalign{\smallskip}
Outside \xmm\ field: & 
1--24, 27--33, 35, 37--41, 46--48, 50, 52, 54, 58, 60,  &
1--32, 34, 35, 37--43, 45, 47, 50, 52, 53, 55, 57, 58, 60--63, \\
& 
61, 65, 70--72, 78, 79, 81, 85, 87, 88, 91, 95, 98--100,  &
66, 67, 69, 74, 75, 77, 78, 80, 81, 83, 85, 87--91, 93, 98, 100,  \\
& 
102, 104, 110, 114, 120, 122, 123, 125, 129, 134,  &
103, 106, 107, 109, 113, 115--120, 123, 125, 127, 128, 130,  \\
& 
135, 137, 148, 154, 159, 169, 171, 180, 183, 185,  &
131, 133--135, 141, 145, 146, 149, 155, 158, 160, 164, 165,  \\
& 
199, 202, 209, 212, 216, 219, 224, 227, 230, 236,  &
167, 176, 179, 181, 185, 186, 189, 192, 196, 201, 202, 204,  \\
& 
237, 242, 245, 246, 257--260, 264, 265, 268, 269,  &
205, 210, 215, 220, 221, 224, 225, 228, 233, 234, 239, 243,  \\
& 
271, 273--276, 282, 285--287, 290, 293, 294, 298,  &
245, 248, 251--253, 259, 260, 263--265, 270, 271, 274, 276,  \\
& 
300, 305, 312, 314, 318--320, 327, 335, 339, 341,  &
278, 280--282, 284, 290--293, 295--298, 300, 302, 305, 309,  \\
& 
342, 350, 356, 358, 362--365, 367, 371, 373, 374,  &
311, 313, 317, 325, 326, 328, 336, 355, 358, 361, 364--367,  \\
& 
376, 377, 381--383, 385--396 &
369, 371--373, 375, 377--379, 381--383, 387--396 \\
\noalign{\smallskip}
Resolved by \xmm: & 
131, 177, 186, 198, 200, 211, 220, 250, 370 &
129, 177, 178, 183, 191, 193, 195, 197, 206, 214, 254, 272, \\
& 
&
374 \\
\noalign{\smallskip}
Not detected,  LH~$<$~12: & (12 of 18 sources) &  (3 of 21 sources) \\
&
59, 62, 63, 69, 84, 86, 113, 149, 161, 307, 329, 330   &
96, 238, 307\\
\noalign{\smallskip}
Not detected,  12~$\le$~LH~$<$~15: & (9 of 29 sources) & (2 of 17 sources)\\
& 
49, 82, 93, 109, 128, 196, 283, 334, 372 &
76, 79 \\
\noalign{\smallskip}
Not detected,  LH~$\ge$~15: &  (22 of 193 sources) & (18 of 167 sources)\\
& 
68(LH~=~14294), 77(25), 80(16), 126(217),  &
104(LH~=~901), 121(94), 171(43), 173(317), 190(216),  \\
& 
133(40), 160(26), 166(17), 190(113), 191(55),  &
207(98), 208(299), 230(76), 232(1166), 246(40), \\
& 
192(54), 203(103), 214(400), 215(251),  &
256(60), 267(22), 322(2703), 324(148), 344(41), \\
& 
232(104), 263(38), 270(40), 277(16), 284(20),  &
356(15), 380(17), 384(16)\\
& 
309(82), 325(21), 331(20), 340(28) &\\
\hline
\end{tabular}}
\end{table}