> Now, am I losing my mind here? I thought that FWHM as defined as
>
> FWHM = sigma * sqrt(8ln2)
> = sigma * 2 * sqrt(2ln2)
That's correct. Some people leave off the outer two and still call it
FWHM even in diagrams when it's clearly only the HWHM.
> whereas the above uses
> = sigma * 2 * sqrt(ln2)
Some people do try to make their claimed seeing better than it really
is. (-:
Oh dear. As you gathered from my previous message, a missing root 2
or inverting the 1.17 factor were the most likely reasons. I'm not at
all surprised. If you want to use this stuff, a code walkthrough
would be prudent, but might damage your health.
> so, um, only broken since 1997 then....
It might have been in the original code, and Norman hadn't noticed the
error (the words wood and trees spring to mind). ESP had become a
poisoned chalice. My first feedback to Grant went on for page after
page after page...
Still bamboozled that the subroutine is GAU1_TEXTO, but the file is
esp1_texto.f (but not eps1_texto (-:).
Malcolm
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