Re: fast 2-D convolution in polar coordinates?
- From: brian@xxxxxxx (Brian Tung)
- Date: Tue, 18 Jul 2006 12:32:56 -0700 (PDT)
Dan McKenna wrote:
I knew an old school professional visual double star observer a few
decades ago who talked about knowing the point spread function of each
telescope he used. He told me that he was able to discover close pairs
this way. IIRC this breed of observer used as much power as possible
so that the stellar disk was at least 3 to 4 arc minutes in diameter.
That's only about 40x per inch--not unreasonably high at all.
Are there any more Pro Visual double star observers left ??
Professional meaning doing it for money? I'm sure there aren't any of
those left. But there are high-powered doubles observers still active.
--
Brian Tung <brian@xxxxxxx>
The Astronomy Corner at http://astro.isi.edu/
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.
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