Difference between revisions of "Fluxscale"

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== Help on fluxscale task: ==
+
{{fluxscale}}
 
 
<pre>
 
Bootstrap the flux density scale from standard calibrators
 
 
 
      After running gaincal on standard flux density calibrators (with or
 
      without a model), and other calibrators with unknown flux densities,
 
      fluxscale will determine the flux density of the unknowns calibrators
 
      that are most consistent with the standard calibrator antenna gains.
 
 
 
      Check the log output to make sure that reasonable flux densities are
 
      obtained.
 
 
 
      Keyword arguments:
 
      vis -- Name of input visibility file
 
              default: none; example: vis='ngc5921.ms'
 
      caltable -- Name of input calibration table
 
              default: none; example: caltable='ngc5921.gcal'
 
              This cal table was obtained from task gaincal.
 
      fluxtable -- Name of output, flux-scaled calibration table
 
              default: none; example: fluxtable='ngc5921.gcal2'
 
              The gains in this table have been adjusted by the
 
              derived flux density each calibrator.  The MODEL_DATA
 
              column has NOT been updated for the flux density of the
 
              calibrator.  Use setjy to do this if it is a point source.
 
      reference -- Reference field name(s)
 
              The names of the fields with a known flux densities or
 
                  visibilties that have been placed in the MODEL column
 
                  by setjy or ft for a model not in the CASA system.
 
              The syntax is similar to field.  Hence field index or
 
                  names can be used.
 
              default: none; example: reference='1328+307'
 
      transfer -- Transfer field name(s)
 
              The names of the fields with unknown flux densities.
 
                  These should be point-like calibrator sources
 
              The syntax is similar to field.  Hence source index or
 
                names can be used.
 
              default: '' = all sources in caltable that are not specified
 
                  as reference sources.  Do not include unknown target sources
 
              example: transfer='1445+099, 3C84'; transfer = '0,4'
 
 
 
              NOTE: All fields in reference and transfer must have solutions
 
              in the caltable.
 
 
 
      append -- Append fluxscaled solutions to the fluxtable.
 
              default: False; (will overwrite if already existing)
 
              example: append=True
 
      refspwmap -- Vector of spectral windows enablings scaling across
 
              spectral windows
 
 
 
      Keyword arguments:
 
      vis -- Name of input visibility file
 
              default: none; example: vis='ngc5921.ms'
 
      caltable -- Name of input calibration table
 
              default: none; example: caltable='ngc5921.gcal'
 
              This cal table was obtained from task gaincal.
 
      fluxtable -- Name of output, flux-scaled calibration table
 
              default: none; example: fluxtable='ngc5921.gcal2'
 
              The gains in this table have been adjusted by the
 
              derived flux density each calibrator.  The MODEL_DATA
 
              column has NOT been updated for the flux density of the
 
              calibrator.  Use setjy to do this if it is a point source.
 
      reference -- Reference field name(s)
 
              The names of the fields with a known flux densities or
 
                  visibilties that have been placed in the MODEL column
 
                  by setjy or ft for a model not in the CASA system.
 
              The syntax is similar to field.  Hence field index or
 
                  names can be used.
 
              default: none; example: reference='1328+307'
 
      transfer -- Transfer field name(s)
 
              The names of the fields with unknown flux densities.
 
                  These should be point-like calibrator sources
 
              The syntax is similar to field.  Hence source index or
 
                names can be used.
 
              default: '' = all sources in caltable that are not specified
 
                  as reference sources.  Do not include unknown target sources
 
              example: transfer='1445+099, 3C84'; transfer = '0,4'
 
 
 
              NOTE: All fields in reference and transfer must have solutions
 
              in the caltable.
 
 
 
      append -- Append fluxscaled solutions to the fluxtable.
 
              default: False; (will overwrite if already existing)
 
              example: append=True
 
      refspwmap -- Vector of spectral windows enablings scaling across
 
              spectral windows
 
              default: [-1]==> none.
 
              Example with 4 spectral windows:
 
              if the reference fields were observed only in spw=1 & 3,
 
              and the transfer fields were observed in all 4 spws (0,1,2,3),
 
              specify refspwmap=[1,1,3,3].
 
              This will ensure that transfer fields observed in spws 0,1,2,3
 
              will be referenced to reference field solutions only in
 
              spw 1 or 3.
 
</pre>
 

Latest revision as of 19:28, 6 May 2015