[AstroPy] fits coordinate system keyword

[Paul Kuin]

Hi Tom,

I forwarded the question to Bill Pence who seems to be now the Fits support
office person. (Sorry forgot to cc you). Also, it is the heasarc files from
Swift that I use, so there is another thing (Bill is part of Heasarc, I
think). In any case, the Fits support office kept track of these kind of
issues in the past, and it is good to push the rusty wheels once again.

Now for the wait...

   Cheers,

        Paul

On Mon, Oct 5, 2015 at 8:34 PM, Thomas Robitaille <
thomas.robitaille at gmail.com> wrote:

> Hi Paul,
>
> Just out of curiosity, was RADECSYS ever a keyword in the FITS standard,
> as opposed to RADESYS? (which is the currently valid keyword). If so, in
> what version of the standard?
>
> Cheers,
> Tom
>
> Paul Kuin wrote:
> > Actually, one of the basic tenets of FITS is to be completely backward
> > compatible, so any keyword that was valid in the past is valid now. So
> > that warning is also inaccurate. If it was standard, it still is, and
> > ever will be.
> >
> >
> >
> > On Mon, Oct 5, 2015 at 5:25 PM, Erik Bray <embray at stsci.edu
> > <mailto:embray at stsci.edu>> wrote:
> >
> >     On 10/05/2015 12:17 PM, Paul Kuin wrote:
> >
> >
> >
> >         I am getting very annoyed of the warning that keeps popping up
> >
> >         WARNING: FITSFixedWarning: RADECSYS= 'FK5' / default
> >         RADECSYS is non-standard, use RADESYSa. [astropy.wcs.wcs]
> >
> >         I'm not sure when the FITS standard changed, but MOST legacy
> >         fits files (I use)
> >         will have the RADECSYS keyword. It works, and I do not see why
> >         someone felt the
> >         need to keep this warning being popped up all the time.
> >
> >
> >     Probably as a warning to remind authors of new files that they
> >     shouldn't be using that keyword.  I don't know that it necessarily
> >     needs to be displayed every time reading in a WCS except maybe to
> >     head off cases of ambiguity.  But I don't know this particular issue
> >     well enough to be sure if the warning is appropriate in all cases or
> >     not.
> >
> >         I think that by default it should be off.
> >
> >         Since you all probably think it should be there, I would like to
> >         know how to
> >         turn it off ?  any suggestion on how to do that?
> >
> >
> >     http://docs.astropy.org/en/stable/warnings.html
> >
> >
> >     Erik
> >
> >     _______________________________________________
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> >     AstroPy at scipy.org <mailto:AstroPy at scipy.org>
> >     https://mail.scipy.org/mailman/listinfo/astropy
> >
> >
> >
> >
> > --
> >
> > * * * * * * * * http://www.mssl.ucl.ac.uk/~npmk/ * * * *
> > Dr. N.P.M. Kuin      (n.kuin at ucl.ac.uk <mailto:n.kuin at ucl.ac.uk>)
> > phone +44-(0)1483 (prefix) -204927 (work)
> > mobile +44(0)7806985366  skype ID: npkuin
> > Mullard Space Science Laboratory  – University College London  –
> > Holmbury St Mary – Dorking – Surrey RH5 6NT–  U.K.
> >
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-- 

* * * * * * * * http://www.mssl.ucl.ac.uk/~npmk/ * * * *
Dr. N.P.M. Kuin      (n.kuin at ucl.ac.uk)
phone +44-(0)1483 (prefix) -204927 (work)
mobile +44(0)7806985366  skype ID: npkuin
Mullard Space Science Laboratory  – University College London  –
Holmbury St Mary – Dorking – Surrey RH5 6NT–  U.K.
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