We don't support IRAF do we?
> -----Original Message-----
> From: Starlink development [mailto:[log in to unmask]] On Behalf Of
> Malcolm J. Currie
> Sent: 29 March 2004 13:14
> To: [log in to unmask]
> Subject: Q222: Iraf aperture tracing
>
> We're just about to pack the car for NAM. Please can somebody answer
> this Quick query for me, and cc. correspondence to [log in to unmask]
> Perhps Martin should just ask the IRAF helpdesk (unless they're not
> answering).
>
> Thanks,
>
> Malcolm
>
>
> Date: Sun, 28 Mar 2004 23:13:01 +0100 (BST)
> From: Martin Cordiner <[log in to unmask]>
> To: [log in to unmask]
> Subject: Iraf aperture tracing
>
> Dear Quick Team,
>
> I hope you can advise me on a problem I'm having with the Iraf apall
> task. I'm extracting VLT UVES echelle spectra, and I'm having great
> difficulty telling IRAF which direction of the dispersion axis to read
> out along. My problem is that all my spectra are extracted back to
> front, and and I want then the correct way round. I know that I can fix
> this after extraction by doing a imcopy [*,-*] type thing, but surely I
> can avoid this by telling Iraf which direction of the dispersion to
> extract along? I tried flipping the input images about the axis
> perpendicular to the dispersion, but bizarrely the extracted spectra
> stil came out the same (wrong) way round - I don't understand this at
> all!. Any assistance in getting Iraf to behave would be greatly
> appreciated.
>
> Thanks,
>
> Martin Cordiner.
> University of Nottingham
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