Continuum polarimetry case

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Continuum polarimetry case

First, set the flux density for 3C 286 (FIELD_ID 11) according to Perley-Taylor (1999):

imgrC:=imager(filename='ap366.ms'); # Start the imager tool
imgrC.setjy(fieldid=11);            # Calculate & set flux density for 
                                    #  1328+307 (3C 286) to 7.462Jy

After running setjy you will get a report in the logger giving the status of the task along with the end results:

  Starting imager::setjy
    1328+307  spwid=  1  [I=7.462, Q=0, U=0, V=0] Jy, (Perley-Taylor 99)
  Finished imager::setjy

Check that the flux is actually set by using the imager.plotvis function to see the value in the MODEL_DATA column. First select only the 3C 286 data using the imager.setdata function, then run plotvis to create Fig 1.10:

imgrC.setdata(fieldid=11);          # Setdata to 1328+307 (3C 286)
imgrC.plotvis(type='model');        # Plot model amplitudes vs uv distance
imgrC.done();                       # Close out the tool.

**Figure 1.10:** **Left:** Use the imager.plotvis function to create a plot like this to check the imager.setjy result. The amplitude of 1328+307 (3C 286) for the continuum polarimetry dataset is now 7.462 Jy at 4885 MHz. **Right:** Plot of 3C 286 amplitude of 14.8 Jy at 1413 MHz for the spectral line dataset.
$\begin{figure}\centering\leavevmode \epsfxsize =.45\columnwidth \epsfbox{cookb... ...=.45\columnwidth \epsfbox{cookbook.dir/vla.plotvis2.ps}\hrulefill \end{figure}$

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