Spectral-line case

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Next: Correct the data Up: Transfer the flux density scale Previous: Continuum polarimetry case

Spectral-line case

In the calibrater tool, transfer the flux scale calculated for 3C 286 to the gain calibrator, 1445+099, and write the scaled solutions to a file on disk called ngc5921.fluxcal. Plot the solutions with the plotcal function (Fig. 1.15):

calS.fluxscale(tablein='ngc5921.gcal',        # Transfer the flux density scale 
               tableout='ngc5921.fluxcal',    #  from 1328+307 (J2000: 3C286) 
               reference='1331+30500002',     #  to the gain calibrator 
               transfer=['1445+09900002']);   #  1445+09900002.  Write 
                                              #  solutions to the table
                                              #  ngc5921.fluxcal located on disk. 
calS.plotcal(tablename='ngc5921.fluxcal',     # Inspect the solutions
             plottype='AMP',
             multiplot=F);

The logger window will report the flux density of the gain calibrator:

  Setting the flux density scale using reference calibrators
  Flux density for 1445+09900002 (spw=1) is:     2.486 +/-  0.000 Jy

$\begin{figure} % latex2html id marker 1052 \epsfig{file=cookbook.dir/vla.plotcal... ... as expected for a good set of scaled gain solutions. } \hrulefill \end{figure}$

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