ID510       XMM source number in 5-10keV catalogue: catP34V.dat
ID210       XMM source number in 2-10keV catalogue: catP34H.dat
ID          source number in Xue+11:Table3 (if >1000 1000+source number in Xue+11:Table6, if ending in E source number in Lehmer+05:Table2, if ending in E and >1000 1000+source number in Lehmer+05:Table6)
XCID        ID510"_"ID
CID         Chandra counterpart ID from catP34V.dat
RA_X        XMM RA from cat... above (deg)
Dec_X       XMM Dec from cat... above (deg)
eRA_X       XMM positional error from cat... above (arcsec)
RA_C        Chandra source RA (deg)
Dec_C       Chandra source Dec (deg)
PosErr      Chandra source positional error (arcsec)
angDist     Distance between XMM and Chandra sources (arcsec)
sigDist     Distance between XMM and Chandra sources in terms of the combined positional uncertainty
reliability Probability of association, independently of other counterparts
assocProba  Probability of association, taking into account all counterparts to the same XMM source
Good        initially reliability>=0.9, later checked by eye 
Signif      SNR in XMM 3Ms exposure (5-10keV)
DET_ML      Likelihood of detection from emldetect
EXPOSURE    XMM exposure time at RA_X,Dec_X (s)
Offax       Off-axis angle in the merged XMM image (arcmin)
FLUX        XMM 5-10keV flux from cat... above (erg cm-2 s-1)
FLUX_ERR    uncertainty on FLUX (erg cm-2 s-1)
FLUX28      XMM 2-8keV flux from FLUX assuming photon index Gamma=1.7 (erg cm-2 s-1)
FLUX28_ERR  uncertainty on FLUX28 (erg cm-2 s-1)
HFlux       Chandra 2-8keV flux (erg cm-2 s-1)
dCX         Distance betwen Chandra Xsou and optical ctpart. (arcsec)
zadopt      adopted redshift of source from Xue+11
Type        source type from Xue+11
MAIN210     source belongs to Main 2-10keV catalogue
MAIN510     source belongs to Main 5-10keV catalogue
nCCtparts       total number of Chandra counterpàrts
nGoodCCtparts   total number of Good Chandra counterpàd/sigma<=5 and reliability/reliability_max>=0.03)
REDSHIFT    redshift for Chandra source from catP34V.dat
zOABo       same as REDSHIFT
zCode       0:zOABo&zadopt agree, 1:zOABo defined, zadopt undefined, 2: zadopt defined, zOABo undefined, -1: zOABo,zadopt defined but different
zMerge      zOABo if defined, else zadopt
URLFchart     relative URL of html file with pointers to finding charts
SpuFlag       -1 (don't know), 0 (real), 1 (prob. real), 2 (prob. spurious), 3 (spurious)
BlendFlag     -1 (don't know), 0 (not blended), 1 (poss. blend), 2 (prob. blend), 3 (blended)
zCheck        boolean: true if zOABo and zadopt are both defined and are different, or if zadopt is defined but not zOABo
IFCAComments  Notes on z and Xsou from IFCA
FChandra      2-8keV flux from Chandra counterpart within 10arcsec radius circle centered in XMM source position
FXMM28        2-8keV XMM flux within 10arcsec radius circle centered in XMM position