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Overview of imager tool functions:
Data access
open, close, done
Data selection
setdata
Data editing
clipvis
Data calibration
correct
Data examination
plotvis, plotuv, plotweights, plotsummary
Weighting
weight, filter, uvrange, sensitivity, fitpsf, plotweights
Image definition
advise, setimage, make
Imaging
makeimage, clean, nnls, mem, pixon, restore, residual, approximatepsf, fitpsf, setbeam, ft, smooth, feather, makemodelfromsd
Masks
mask, boxmask, regionmask, exprmask, clipimage
Miscellaneous
summary, setoptions, setoptions, setoptions

Example The following example shows the quickest way to make a CLEAN image and display it. Note that this can be more easily done from the ??.

include ’imager.g’  
#  
# First make the MS from a FITS file:  
#  
m:=fitstoms(msfile=’3C273XC1.MS’, fitsfile=’3C273XC1.FITS’); m.close();  
#  
# Now make an imager tool for the MS  
#  
imgr:=imager(’3C273XC1.MS’)  
#  
# Set the imager to produce images of cellsize 0.7 and  
# 256 by 256 pixels  
#  
imgr.setimage(nx=256,ny=256, cellx=’0.7arcsec’,celly=’0.7arcsec’);  
#  
# Wait for results before proceeding to the next step  
#  
dowait:=T  
#  
# Make and display a clean image  
#  
imgr.clean(niter=1000, threshold=’30mJy’,  
model=’3C273XC1.clean.model’, image=’3C273XC1.clean.image’)  
dd.image(’3C273XC1.clean.image’)  
#  
# Fourier transform the model  
#  
imgr.ft(model=’3C273XC1.clean.model’)  
#  
# Plot the visibilities  
#  
imgr.plotvis()  
#  
# Write out the final MS and close the imager tool  
#  
imgr.close()

Please send any comments or questions about CASA or AIPS++ to aips2-requests@nrao.edu

Copyright © 2008 Associated Universities Inc., Washington, D.C.

This code is available under the terms of the GNU General Public Lincense


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