Selection according to cluster diameters

For observing purpose it may be useful to select clusters in function of their apparent diameter D. The command ocl and its syntax:

ocl D option value

allows to make selection on the apparent diameter, expresed in minutes of arc.

The standard options are used to select clusters that have an apparent diameter equal to (-eq), larger than (-gt), smaller than (-lt) or inbetween (-i) given limits.

The output list is displayed by increasing value of D.

Example:

ocl D -gt 100 select clusters with D > 100 'arc