Example scripts

This example is a full reduction with two filter types, error generation and defect removal. The debiassing is performed using a zeroed master bias that is offset to the bias strips. To execute this in the background see elsewhere.

#
# Command file to run a CCDPACK reduction sequence from a
# C shell background job.
#
# set up the global parameters.
#
ccdsetup bounds='[323,349]' rnoise=10 adc=1 extent='[4,318,3,510]' \
         direction=x logto=terminal genvar=true mask=defects.ard \
         reset accept
#
# Add some explanatory notes
#
ccdnote <<FOO
Test run of CCDPACK. -
Reduction perform by AUSER on 8-JUN-1992.
FOO
#
# Make the master bias frame.
#
makebias in='bias/*' out=bias/master_bias accept
#
# DEBIAS all the frames. Note using a master bias frame and
# offsetting to the bias strips.
#
debias in='"flatr/*,flatb/*,bdata/*,rdata/*"' out='*_debias' accept
#
# Create the master flat fields for the R and B filters.
#
makeflat in='flatr/*_debias' out='flatr/master_flat' accept
makeflat in='flatb/*_debias' out='flatb/master_flat' accept
#
# Flat field all the appropriate frames.
#
flatcor in='rdata/*_debias' out='*|debias|flattened|' \
        flat=flatr/master_flat accept
flatcor in='bdata/*_debias' out='*|debias|flattened|' \
        flat=flatb/master_flat accept
#
# All done. Add note.
#
ccdnote '"Test reduction finished"'
#

The next example is a less comprehensive one with no error generation and just one filter type. The debiassing uses a master that is subtracted without offsetting as the data has no bias strips.

#
# Command file to run a CCDPACK reduction sequence from a
# C shell background job.
#
# Clear all existing global parameters
#
ccdclear reset accept
#
# Now set the new ones.
#
ccdsetup extent='[4,318,3,510]' logto=terminal genvar=false reset accept
#
# Make the master bias frame.
#
makebias in='bias*' out=master_bias zero=false accept
#
# DEBIAS all the frames. Note using a master bias that is just
# subtracted
#
debias in='"data*,ff*"' out='*-db' offset=false accept
#
# Create the master flat field.
#
makeflat in='ff*-db' out=master_flat accept
#
# Flat field all target frames.
#
flatcor in='data*-db' out='*-fl' accept
#

The next example debiasses using bias strips.

#
# Command file to run a CCDPACK reduction sequence from a
# C shell background job.
#
# Clear all existing global parameters
#
ccdclear reset accept
#
# Now set the new ones.
#
ccdsetup bounds='[1,5,323,349]' extent='[4,318,3,510]' logto=terminal \
         genvar=false reset accept
#
# DEBIAS all the frames. Note using interpolation between the bias strips.
#
debias in='"data*,ff*"' out='*-db' accept
#
# Create the master flat field.
#
makeflat in='ff*-db' out=master_flat accept
#
# Flat field all target frames.
#
flatcor in='data*-db' out='*-fl' accept
#

The next example debiasses using bias strips and creates a flatfield using known exposure times and avoids the defect cleaning process in MAKEFLAT.

#
# Command file to run a CCDPACK reduction sequence from a
# C shell background job.
#
# Clear all existing global parameters
#
ccdclear reset accept
#
# Now set the new ones.
#
ccdsetup bounds='[1,5,323,349]' extent='[4,318,3,510]' logto=terminal \
         genvar=false reset accept
#
# DEBIAS all the frames. Note using interpolation between the bias strips.
#
debias in='"data1,data2,data3,ff1,ff2,ff3"' out='*-db' accept
#
# Combine the flatfields using known exposures and avoiding
# the MAKEFLAT cleaning process. Normalize it to have a mean of 1.
#
makecal in='"ff1,ff2,ff3"' expose='"600,900,700"' out=master_tmp
kappa
set mean=`stats master_tmp | grep mean | awk '{print $4}'`
cdiv in=master_tmp scalar=$mean out=master_flat
\rm master_tmp.sdf
#
# Flat field all target frames.
#
flatcor in='data[1-3]-db' out='*-fl' flat=master_flat accept
#

Note that in all these examples it is necessary to protect certain symbols from being interpreted by the shell. The CCDNOTE entries use the shell to read in lines of data (until the occurrence of FOO, that's what <<FOO means - read this file until an occurrence of FOO).

Copies of these files can be found in the $CCDPACK_DIR directory, called ccdpack_ex3.csh,
ccdpack_ex4.csh, ccdpack_ex5.csh and ccdpack_ex6.csh.