\begin{table}%t2
%\centering
\caption{Optical counterparts.\label{optical sources}}
\begin{tabular}{lcccrrc}
\hline \hline
No. & GSC & \multicolumn{2}{c}{Optical position} & \multicolumn{1}{c}{$m_{V}$} & 
\multicolumn{1}{c}{Separation} & $\log$ \\
\cline{3-4}
 & name & RA (2000) & Dec (2000) & \multicolumn{1}{c}{[mag]} & \multicolumn{1}{c}{[arcsec]} 
& $f_{\rm X}/f_{V}$ \\
\hline
1 & \object{0430601190} & 00:00:02.1 & +73:39:46 & 12.0 & 7 & $-2.44$\\
2 & \object{0449602286} & 00:01:42.5 & +77:31:06 & 11.7 & 8 & $-2.39$\\
3 & \object{0450000730} & 00:28:28.1 & +78:57:43 & 10.4 & 12 & $-2.87$\\
4 & \object{0450001478} & 00:38:05.4 & +79:03:21 & 9.3 & 10 & $-2.95$\\
5 & \object{0450001549} & 00:39:06.1 & +79:19:10 & 11.9 & 8 & $-1.79$\\
6 & \object{0430701640} & 00:46:22.3 & +74:12:49 & 12.7 & 3 & $-1.99$\\
7 & \object{0429600542} & 00:53:00.5 & +68:21:22 & 12.2 & 6 & $-1.98$\\
8 & \object{0430401407} & 01:01:17.3 & +71:31:13 & 10.6 & 3 & $-2.71$\\
9 & \object{0429600222} & 01:09:28.8 & +68:39:15 & 10.1 & 4 & $-2.81$\\
10 & \object{0430501893} & 01:19:34.2 & +71:30:33 & 11.0 & 2 & $-3.13$\\
11 & \object{0430900722} & 01:29:28.6 & +74:44:49 & 12.8 & 4 & $-1.91$\\
12 & \object{0431401757} & 01:39:25.9 & +70:18:50 & 9.8 & 2 & $-2.82$\\
13 & \object{0449902076} & 02:20:37.2 & +77:44:13 & 11.9 & 17 & $-2.61$\\
14 & \object{0431200734} & 02:26:12.8 & +68:11:33 & 12.3 & 9 & $-2.10$\\
15 & \object{0458902335} & 20:05:48.9 & +77:05:53 & 10.4 & 13 & $-3.11$\\
16 & \object{0458900369} & 20:11:53.6 & +78:34:37 & 11.1 & 10 & $-2.71$\\
17 & \object{0424400322} & 20:14:26.1 & +66:05:19 & 11.2 & 5 & $-2.76$\\
18 & \object{0424101092} & 20:19:48.7 & +65:34:11 & 10.5 & 7 & $-2.92$\\
19 & \object{0458901101} & 20:20:29.3 & +78:07:22 & 9.9 & 4 & $-3.18$\\
20 & \object{0445900083} & 20:25:15.4 & +73:36:33 & 10.7 & 7 & $-2.11$\\
21 & \object{0445101270} & 20:33:43.7 & +70:53:18 & 11.7 & 6 & $-2.66$\\
22 & \object{0445100172} & 20:38:13.9 & +69:24:12 & 12.8 & 6 & $-1.98$\\
23 & \object{0445500856} & 20:43:28.4 & +71:15:47 & 11.7 & 2 & $-2.99$\\
24 & \object{0459401127} & 20:53:12.0 & +79:20:22 & 11.9 & 9 & $-2.88$\\
25 & \object{0425500314} & 20:56:09.3 & +65:10:30 & 10.3 & 7 & $-2.94$\\
26 & \object{0458600348} & 21:04:20.7 & +75:04:04 & 11.1 & 6 & $-2.48$\\
27 & \object{0446401372} & 21:10:24.5 & +70:45:58 & 11.0 & 5 & $-2.29$\\
28 & \object{0458601090} & 21:11:29.4 & +76:14:29 & 11.4 & 5 & $-2.32$\\
29 & \object{0446001614} & 21:11:44.0 & +68:54:22 & 10.4 & 9 & $-3.24$\\
30 & \object{0446501410} & 21:32:53.8 & +70:37:43 & 12.0 & 7 & $-2.38$\\
31 & \object{0460700461} & 21:37:47.4 & +80:32:31 & 11.0 & 5 & $-2.42$\\
32 & \object{0460700611} & 21:42:57.6 & +80:30:19 & 11.3 & 2 & $-2.87$\\
33 & \object{0427501998} & 22:05:25.8 & +65:52:19 & 10.9 & 6 & $-2.46$\\
34 & \object{0460801986} & 22:11:11.0 & +79:18:00 & 12.7 & 6 & $-1.95$\\
35 & \object{0446300818} & 22:11:57.8 & +68:19:52 & 11.5 & 9 & $-2.30$\\
36 & \object{0427200174} & 22:27:05.3 & +65:21:31 & 12.7 & 13 & $-1.96$\\
37 & \object{0448000917} & 22:33:44.9 & +70:33:18 & 10.7 & 9 & $-2.70$\\
38 & \object{0460400743} & 22:39:58.1 & +77:49:40 & 11.7 & 6 & $-2.37$\\
39 & \object{0460101894} & 22:51:35.8 & +76:35:54 & 11.4 & 5 & $-2.26$\\
40 & \object{0460502733} & 23:00:44.4 & +77:28:38 & 10.9 & 5 & $-2.31$\\
41 & \object{0460500268} & 23:05:36.1 & +78:22:39 & 13.0 & 8 & $-1.72$\\
42 & \object{0460100938} & 23:07:56.4 & +76:51:47 & 10.7 & 14 & $-2.77$\\
43 & \object{0448900036} & 23:09:43.4 & +73:57:15 & 12.0 & 9 & $-2.08$\\
44 & \object{0460500170} & 23:16:18.1 & +78:41:56 & 11.8 & 2 & $-1.59$\\
45 & \object{0447900348} & 23:43:41.9 & +68:46:27 & 12.6 & 8 & $-1.88$\\
46 & \object{0461001318} & 23:51:10.0 & +78:58:05 & 11.4 & 4 & $-2.27$\\ 
\hline
\end{tabular}
\end{table}