UCD question: how to specify reference to a flat field image?

[Andrea Preite Martinez]

Quoting Brian Thomas <thomas at astro.umd.edu>:


> 	How does one specify "a flat-field calibration file" using UCD   
> 1.23? I see that the
> 	'meta.file' and 'obs.calib.flat' UCDs both exist, however, they are  
>  both marked as
> 	'secondary', so neither may be the first in a composed word, and   
> apparently cant
> 	be combined.
>
> 	What should I do here?

Hello Brian,

remember that there is a service to help build ucds at

http://vizier.u-strasbg.fr/UCD/cgi-bin/descr2ucd

that works in a lot of cases.
If you input  "flat-field calibration file"

you get:  instr.calib;meta.file

and a list of other possibilities.

Andrea


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