COMMAND TYPE : SELECTION
PURPOSE:
DESCRIPTION:
This command counts the number of objects in a catalogue that satisfy constraints imposed on the fields, moreover can evaluate the maximum, the minimum, the average and the RMS of a numerical field.
Typically this task is used when the user wants to know how many objects there are in a sky region or how many objects have a given value in a field.
From: PDB ?
Example : Y
Catalogue Name
Example : UGC
Variable:
Example : RADVEL
Evaluate sigma ?
Example : Y
Where
Example : MAG < 13 AND (MAG-MAGV) < 1.5
The CTRL-L key provides more rows to write field names.
Set/Modify constraints on coordinates ?
Example : Y
INPUT FIELDS of the coordinate window:
1Coordinate
Example : RA
>From : To:
Example : 10 20 35.00 10 45 00.00
2Coordinate
Example : DEC
>From : To:
Example : -30 20 00.00 -27 20 00.00