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Calibration-1

Simple calibration with a single correlator setting through all sources. A passband and phase (amplitude) calibrator is used in addition to the source of interest. useful for continuum and simple line observations in e.g. a 32 MHz window. There is also no need for NOISE source.

   set vis=ct002blabla    # the observed multi-source dataset from CARMA archive
   set bcal=3c273         # bandpass calibrator
   set pcal=3c454         # phase calibrator
   set src=ngc1234        # your source 

   # create and inspect an (antenna based) bandpass solution
   mfcal vis=$vis select="source($bcal)"
   gpplt vis=$vis ....

   # apply, take out autocorrelations, selfcal does not handle them
   uvcat vis=$vis out=$vis.bp select=-auto

   # create and inspect phase and amp calibrator, assuming we trust the flux
   selfcal vis=$vis.bp select="source($pcal)" options=amp,apriori,noscale
   gpplt vis=$vis.bp ....

   # map and deconvolve the source
   invert vis=$vis.bp select="source($src)" map=map0 beam=beam0 options=mosaic
   ...

One can even imagine a more compact form, of combining the bandpass and phase calibrator:

   set vis=ct002blabla    # the observed multi-source dataset from CARMA archive
   set cal=3c273          # bandpass and phase calibrator
   set src=ngc1234        # your source 

   # create and inspect an (antenna based) bandpass solution
   mfcal vis=$vis select="-auto,source($cal)" interval=5
   gpplt vis=$vis .... options=bandpass

   # inspect
   uvplot ...
   uvspec ...

   # map and deconvolve the source
   invert vis=$vis select="source($src)" map=map0 beam=beam0 options=mosaic
   ...



Peter
2009-10-05