Table 5: Results of the cross-correlations between the list of X-ray sources and the optical/IR master catalogues. For all fields, the total number of candidate counterparts is larger than those of the X-ray sources because of multiple matches.

Field ID	Detected	X-ray sources	X-ray sources	Candidate	Reliability
	Sources	with no counterpart	with counterpart	Counterparts	(1-P)
1	50	27	23	26	84%
2	37	7	30	46	76%
3	32	7	25	41	82%
4	27	3	24	40	70%
Total	146	44	102	153	-
5	38	18	20	21	71%
6	51	34	17	19	80%
7	7	5	2	2	81 %
8	52	24	28	37	76%
Total	148	81	67	79	-