All Tables

Table 1: Main characteristics of the eight EPIC observations of 3EG J0616-3310 (Field ID = 1-4) and 3EG J1249-8330 (Field ID = 5-8).
Table 2: X-ray sources detected in each energy range.
Table 3: Summary of the optical observations performed by the Wide Field Imager of the 2.2 m MPG/ESO telescope at La Silla.
Table 4: Limiting magnitudes (3 $\sigma$ ) of our multiband optical-to-IR photometry. $\it UBVRI$ values are derived either from the WFI observations or, when not available, from the GSC-2.3 B_J,F,N equivalent (in italics). JHK values are taken from 2MASS. An hyphen indicates that no measurements are available. The last column lists the total number of objects per pointing after matching over all the passbands.
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.
Table 6: Range of the expected $f_{\rm X}/f_{\rm opt}$ flux ratios (min/max value in logarithmic units) for the different object classes and EPIC fields. The X-ray fluxes refer to the full XMM-Newton energy range (0.3-10 keV), while the optical fluxes refer to the Johnson's B ( top) and V ( middle) bands and to the B_j band ( bottom). For each source class the slight differences in the $f_{\rm X}/f_{\rm opt}$ values are due to the different $N_{\rm H}$ of the various EPIC fields, which affects the count-rate-to-flux conversion factor.
Table 7: Main characteristics of the X-ray sources with no candidate optical counterpart and $\log(f_{\rm X}/f_{\rm opt})\protect \ga 2$ .
Table A.1: Range of the applicable B-V colours for the selected classes of objects