Eduardo,
As far as I know GAIA provides a graphical interface to EXTRACTOR and
displays the results. There are so many SExtractor results parameters,
especially measueres of object radius, GAIA would need to offer a
selection for each of the relevant attributes to be used to construct
the ARD mask. I think you'll need to write a script.
In ORAC-DR we selected the output fields in the EXTRACTOR catalogue,
adjusted some of these to what we need for writing the ELLIPSE region
inthe ARD file. This includes the co-ordinates to allow for the pixel
origin, and the ellipse semi-minor axis.
http://www.starlink.ac.uk/star/bin/oracdr/src/primitives/imaging/_MAKE_OBJECTS_MASK_
Malcolm
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