Identification of the source (6 columns)
A consecutive number which identifies each entry (detection) in the
A unique number assigned to a group of catalogue entries which are
assumed to be the same source. To identify members of the same group
the distance in arcseconds between each pair of sources was compared
on the two-sigma level of both positional errors. A maximum distance
of 7" was assumed, which was reduced to 0.9 * DIST_NN
(distance to the nearest neighbour) where necessary. See Sec. 3.3.2 a) for a
more detailed description.
The IAU name assigned to the unique SRCID (see Sec. 3.3.2 b)).
SRC_NUM (J) SAS task
The (decimal) source number in the individual source list for this
observation; in the hexadecimal system it identifies the
source-specific product files belonging to this detection (Appendix A.1).
The IAU name of the 1XMM source ID (matched within radius of 10" and
using the closest candidate), see Sec. 3.3.4.
The distance between this source and the matched 1XMM source
(MATCH_1XMM) in arcseconds.