[News] SigmaClip Update

[Roeland Rengelink]

Hi all,

I have updated the python wrapper to reflect these changes.

Roeland

Alfredo Volpicelli wrote:

>Hi all,
>
>The files containing the sigma clipping algorithm have been
>updated few days ago in the AW cvs. There is a little change in the
>parameters.
>
>The previous version gives the possibility to the user to choose between
>median and average for the sigma clip estimator (NOT for the final output,
>which is always the average !).
>This was done through the parameter -e (-- estimator).
>The correction to the sigma, which is done when the scaling is activated,
>is applied ONLY to the case of the median.
>There is not any real need to maintein this option: for a large number of
>frames (~10) the median is more robust than the average as it excludes the
>cosmics.
>For a low number the statistics is poor in any case and the average would not
>improve the situation.
>
>Therefore in the current version of the algorithm the median is the only
>estimator for the sigma clip and the -e parameter has been dropped.
> 
>The updated files are:
>- opipe/Recipes/SigmaClip.py
>- opipe/eclipse/src/iproc/cube_sigmaclip.c
>- opipe/eclipse/src/include/cube_sigmaclip.h
>
>More info is provided in the attached gzipped ps file.
>
>You are kindly invited to test this algorithm and let us
>know your comments and suggestions.
>
>Please consider that you have to rebuilt eclipse
>in order to include the new version of eclipse.
>
>
>Best regards,
>                Alfredo.
>
>
>______________________________________
>
>               Dr. Alfredo Volpicelli
>
>______________________________________
>
>INAF (Istituto Nazionale di Astrofisica)
>Osservatorio Astronomico di Capodimonte
>via Moiariello 16, I-80131 Napoli. Italy
>
>______________________________________
>
>Tel/fax+39-081-5575448 / 456710
>e-mail alfvol@na.astro.it
>
>______________________________________
>  
>