PHOTOM -- Aperture photometry

[SUN/45]

This performs aperture photometry. It has two basic modes of operation:

• Using an interactive display to specify the positions for the measurements.
• Obtaining those positions from a file.

The aperture is circular or elliptical, and the size and shape can be varied interactively on the display, or by entering values from the keyboard or parameter system. The background sky level can be sampled interactively by manually positioning the aperture, or automatically from an annulus surrounding the object.

To run PHOTOM:

from ICL:

    ICL> HELP PHOTOM
    ICL> PHOTOM
    IN - NDF containing input image /@ramp1/ > adam_examples:image
    COMMAND - PHOTOM /'Values'/ > H (for help)
    COMMAND - PHOTOM /'Values'/ > (an option from the menu)
    COMMAND - PHOTOM /'Values'/ > E

from DCL:

    $ RUN PHOTOM_DIR:PHOTOM
    IN - NDF containing input image /@ramp1/ > adam_examples:image
    .
    . (as above)