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Arcturus


From the author of   Sizing Up The Universe

22:30 EDT May 29, 2006.
Starlight Express SXV-H9 on 10" RCOS at f/9.
100 x 0.01 seconds at 1 fps.
Filter: Ha
Sampling: 1 l/D = 0.8 pixels
Measured: FWHM = 2.26 arcseconds = 3.9 pixels

Linear stretch.
Richardson-Lucy Deconv, Log stretch.
Log stretch, Unsharp mask.

Log stretch movie.
Linear stretch movie, in and out of focus.
Note: Poisson's spot.

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