Menu' for the selection on the Dira2 catalogues. You must enter here the
constraints for the selection.
You can select "All Catalogues" or a class of these: (i.e. Radio, Optic, QSO,
galaxies ...). Or you can select catalogues by name (max 32 catalogues).
You can have the list of the catalogues currently available in the database
with the " Show a brief list of the Catalogues in the DIRA2 database"
- Selection by Class: Clic on the relative button to select the
class of catalogues that you need. Whith the Class "All catalogues" you can
select all the catalogues of the database.
Inside a class you can get data only from catalogues where the precision
of the coordinate is better than a defined value.
In the fields Required Coordinates precision" you must
enter the precision code as follow:
HH MM SS.ccc sDD PP SS.ccc
1 23 45 678 1 23 45 678
(i.e. when you want to use catalogues with precision equal or better of one
second in RA and one arsec in DEC you must enter 5 and 5) Catalogues with less
precision will be skipped.
- Selection by Name : Click on the button relative to the
catalogues that you need. When you select catalogues by name all the selection
by classes (if present) will be ignored.
[ MENU ]