Aperture radius settings in the Seeing Profile dialog

Posted by Richard Lee on Mar 15, 2020; 4:35pm
URL: http://astroimagej.170.s1.nabble.com/Aperture-radius-settings-in-the-Seeing-Profile-dialog-tp1304.html

Hello

Question about aperture radius settings in the Seeing Profile dialog, Fig 16 in the extended AIJ paper 2017.

Based on the aperture radius-to-FWHM factors in the figure script & A.5 Radial Profile, I get the following aperture radius values for FWHM = 10.5 pixels, compared with figure annotations (nn).
     Source radius =              1.7 x 10.5 = 17.9   (20)
     Bkgnd inner radius =       1.9 x 10.5 = 20.0   (35)
     Bkgnd outer radius =      2.55 x 10.5 = 26.7   (53)

The inner & outer radii are roughly 2x the computed values, so maybe the figure shows diameter instead of radius?

Running version 3.4.0.01 I get a similar discrepancy, the source aperture matches but the bkgnd apertures are about twice the expected radius.

Regards

Richard Lee