[ ESO ] La Silla

on the NTT


This page contains BADPIX masks for EMMI_RED

A detailed report on the creation of the BADPIX masks can be found here, while the following is a summary of the processes and the resulting BADPIX masks for EMMI-RED. NOTE: The masks for EMMI-RED are NOT trimmed


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 EMMI-RED 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

Date Single, untrimmed pixel list file created
from EMMI-RED MEF images merged
into a simple FITS file with inemmi.prg
4 separate, untrimmed pixel list files for
reducing the EMMI-RED chips separately
  2x2 binning 2x2 binning
13 March 2004 BADPIX_EMMI_20040313.pl BADPIX_EMMI_20040313.tar.gz
2 June 2003 BADPIX_EMMI_20030602.pl  

How to use the BADPIX masks

The file you download is either a single badpix mask, or 2 badpix masks tarred and gzipped. None of these files has been trimmed. You must use them on untrimmed data, or trim them to the same size as your data.
Note: these files are 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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