On Tue, 5 May 2009, Marija Stankovic wrote:
> I might me wrong, but from my experience, I think that the coordinates
> displayed in your legends are for the center (reference) point of your
> cube. The positions of the spectra are not actually included in the
> legend, and I don't know how to add/change that. I noticed when I send
> spectra to splat from gaia that legend will have "spec position" and
> "src position" and here "src position" is the same as Doppler RA,DEC.
> Hope this helps.
Hi Gary,
Marija is correct, the positions reported in the synopsis are the spectral
reference position (which is stored in the spectral part of the WCS), not
the extraction position. SPLAT is internally 1D so doesn't handle the fact
that these are really 3D spectra, it just throws the redundant axes away.
If you'd extracted these spectra with GAIA then SPLAT would know the
extraction point because GAIA updates the FITS headers with that
information. If you just wanted to patch these you could do:
% kappa
% fitswrite test1spec.sdf EXRAX VALUE=44.8504
% fitswrite test1spec.sdf EXDECX VALUE=-1.7669
and similar for test3spec and SPLAT would display this in the synopsis.
Peter.
--
Peter W. Draper, http://astro.dur.ac.uk/~pdraper
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