1 PRIMARY Correct for the interferometer primary beam attenuation an input cube
        PRIMARY

    Apply  primary beam correction to an interferometer map (i.e. DIVIDE the
    input image by the primary beam). The primary beam is assumed  to  be  a
    Gaussian.  After  this correction, the noise is increasing exponentially
    with the distance to the map center, and the resulting image has thus to
    be truncated at some radius.

    For  the  Plateau de Bure interferometer, the typical values of the FWHM
    primary beam is:
              58" at 85 GHz (3.5 mm)
              50" at 100 GHz (3 mm)
              43" at 115 GHz (2.7 mm)
              21" at 230 GHz (1.3 mm)

2 Y_NAME$
        TASK\FILE "Uncorrected Image Name" Y_NAME$

    The input file name
2 X_NAME$
        TASK\FILE "Corrected Image Name" X_NAME$

    The output file name
2 BEAM$
        TASK\REAL "FWHM of primary beam (radians)" BEAM$

    The half‐power beam width of the interferometer dishes (in radians)
2 RADIUS$
        TASK\REAL "Radius to truncate data (radians)" RADIUS$

    The outer radius of the corrected images. Data outside this radius  will
    be blanked.
1 ENDOFHELP
































