[ ESO ] La Silla

BADPIX masks for EFOSC2
on the 3.6m


Description

This page contains BADPIX masks for EFOSC2.

NOTE: A detailed report on the creation of the BADPIX masks can be found here.

NOTE: There also exists an older report on badpixels and cosmetics of EFOSC2.
The following is a summary of the processes and the resulting BADPIX masks for EFOSC2.


Program

I have written a PERL script ( mkBADPIX.pl ) which takes the raw data and outputs the tarred, gzipped badpixel files to go on the web.

Creation -- What mkBADPIX.pl does

The BADPIX masks for EFOSC2 are created in the following way:

                    Image Reduction and Analysis Facility
PACKAGE = ccdred
   TASK = ccdmask

image   =                       Input image
mask    =                       Output pixel mask
(ncmed  =                    7) Column box size for median level calculation
(nlmed  =                    7) Line box size for median level calculation
(ncsig  =                   15) Column box size for sigma calculation
(nlsig  =                   15) Line box size for sigma calculation
(lsigma =                  20.) Low clipping sigma
(hsigma =                  20.) High clipping sigma
(ngood  =                    5) Minimum column length of good pixel seqments
(linterp=                    2) Mask value for line interpolation 
(cinterp=                    3) Mask value for column interpolation 
(eqinter=                    2) Mask value for equal interpolation
(mode   =                   ql)


BADPIX masks

Data taken June 21 2003 .


How to use the BADPIX masks

The file you download is a single badpix mask with no trimming. You must not trim your images in order to use it.
It is labelled BADPIX_EFOSC_yyyy-mm-dd.pl.
It is NOT a perl script (though the labelling is misleading). This is the file that you indicate in the FIXFILE keyword of CCDPROC .
Simply enter the name of the badpix file there and run CCDPROC . That's all there is to it!


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