On Wed, 15 Dec 2004, David Berry wrote:
> Thanks Peter, the stsci site looks very informative. I'm back on STC stuff
> for today, awaiting coments from Tim on whether a simple scaling factor is
> sufficient to describe antenna temp.
>
> One problem I see looming is where values for all these extra attributes
> are going to come from, given that there is no FITS standard for them.
> SPLAT may need to allow the user to enter them manually...
Indeed another UI for the list, it's odd that FITS just has "mag", with no
qualifiers.
But on the bright-side surely UCDs will help with VO data. In fact doesn't
that seem like a good place to look for what we should probably be
supporting (bandpass-wise)? Well it did until I looked and counted 151
magnitude related UCDs (which may explain the FITS stance).
> > You can do anything accurately for magnitudes as it also depends on the
^^^
sorry meant cannot
> > spectral shape of the power in the actual object (the STSCI convertors
> > seem to attempt to address this question a little), so these conversions
> > are probably doomed to be useful in SEDs and not much else.
Peter.
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