... managers.¹

For set-up on SAO computers see the SAO-HEAD IRAF Users Site Guide.

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... rp90_ab_smo.imh²

See Smoothing and Contouring for generation of this smoothed image.

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... n=5³

This form specifies that the region between 0,50 pixels should be divided into 5 equal-width annuli. It is equivalent to: a 503 513 0 10 20 30 40 50.

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... =rp90_ab_smo.imh⁴

The output file is written to your imdir directory. If this directory does not exist, the program will crash at the end.

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