User manual

5.6catalogues cross-match

Button cross

Menu: catalogue => Cross match objects…

Aladin has an integrated cross-match tool for sources. The goal is to establish the shared

sources between two catalogues. The cross-match tool will consider 2 catalogue planes,

do the correlation and generate a new catalogue plane containing the shared sources.

The window controlling the cross-match can be access by the button “cross” or with the

menu “catalogue => Cross match objects”.

The three cross-match modes

Aladin has 3 cross-match modes that can be access with the tabs on top of the

correlation window:

 A cross-match based only on the position;

 A cross-match “by field” based on identical values in a column of each catalogue (e.g.

an identification);

 A cross-match based on the location, taking into account error ellipses.