Data Models in Madrid
Anita Richards
amsr at jb.man.ac.uk
Fri Sep 30 02:59:39 PDT 2005
>>
> I have a comment concerning flux calibration, page 13 paragraph in red!
> For Flux.Calibration in addition to ABSOLUTE, RELATIVE and UNCALIBRATED
> it would be usefull to have NORMALIZED. It can be used for (stellar!
> perhaps not only?) spectra which have been normalized to continuum flux.
> It is very common in stellar physics where these data can be used to
> perform as advance analyses as abundances calculations, at least from
> absorption lines.
> SY
> --
> Pierre
I agree in fact that goes for some old radio images as well as spectra
where the units are given as % of peak intensity. However that does raise
the issue, that the normalisation level is also required, as this may be
100 (for %) or 1 or ?
thanks
a
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Dr. Anita M. S. Richards, AstroGrid Astronomer
MERLIN/VLBI National Facility, University of Manchester,
Jodrell Bank Observatory, Macclesfield, Cheshire SK11 9DL, U.K.
tel +44 (0)1477 572683 (direct); 571321 (switchboard); 571618 (fax).
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