Yes. From my user perspective I thought the default coordinates
offered by Wiener were wrong because I knew that the file with the PSF
was a small one. I attempted to type in the "right" ones and this
caused the problem.
Eduardo
On 28 February 2013 18:56, Tim Jenness <[log in to unmask]> wrote:
> Malcolm - WIENER is defaulting to the middle pixel of the PSF image. Eduardo
> was overriding the default if you look at the example that he provided (it
> is defaulting to 818).
>
> --
> Tim Jenness
>
>
> On Thu, Feb 28, 2013 at 2:49 PM, Malcolm J. Currie <[log in to unmask]>
> wrote:
>>>
>>> Yes, if you run KAPPA stats then it will report the peak of the PSF in
>>> pixel coordinates that you can use. You've also got an OFFSET frame
>>> active.
>>> The Wiener documentation explicitly suggests using PSF. I wonder if it
>>> centres the output PSF on the first star that it uses.
>>
>>
>> Yes that's what KAPPA:PSF does. Parameters XCENTRE and YCENTRE are
>> constrained by the respective bounds in both LUCY and WIENER, but in LUCY
>> the default is the image centre. Unless there is a good reason
>> for it, WIENER's XENTRE and YCENTRE should default too. The fewer prompts
>> to a good result, the better.
>>
>> Thanks for bringing this to our attention Eduardo.
>>
>> Malcolm
>> --
>> Scanned by iCritical.
>>
>>
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>
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--
Eduardo Unda-Sanzana
Research (in English): http://research.almagesto.org
Personal (in Spanish): http://eduardo.almagesto.org
"Solamente lo barato se compra con el dinero" (A. Cortez)
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