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Hi, Sorry but this doesn't seem to be very sensible behaviour. Displaying a position which is not the position of the spectrum (and potentially misleading a user) seems much worse than not displaying any position at all! Gary On Tue, May 05, 2009 at 05:29:39PM +0100, Peter W. Draper wrote: > 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 -- e-mail: [log in to unmask] http://www.manchester.ac.uk/jodrellbank/~gaf phone:+44-(0)161-306-3653/fax 275-4247, mobile:+44-(0)795-874-2596 Jodrell Bank Centre for Astrophysics, Alan Turing Building, University of Manchester, Manchester, M13 9PL, UK