[Ifeffit] Re: sigma squared

[Carlo U. Segre]

Agreed, I also checked artemis later with a single data set and i did not 
see anything like Scott showed in his screenshot.

Carlo

On Thu, 31 Mar 2005, Matt Newville wrote:

> Carlo,
>
>> The screenshot did not come through to me but I can tell you
>> what I have discovered for the Kaiser-Bessel function:
>>
>> 1. in Chi(k) the window starts to drop at the selected value.
>> It reaches zero a bit lower (higher) than the value set.  In
>> k-space, it is hard to see this because of the scale but if
>> you zoom, you can see that the drop takes about 0.05 delta k.
>> See the "k-space.png" attachment where the window is set to
>> 2.997.
>
> It's probably that 0.05Ang^-1 is the spacing between points in
> k-space, so you're just seeing the line that join two successive
> points.  The danger of looking too closely!
>
> --Matt
>
>
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-- 
Carlo U. Segre -- Professor of Physics
Associate Dean for Special Projects, Graduate College
Illinois Institute of Technology
Voice: 312.567.3498            Fax: 312.567.3494
Carlo.Segre at iit.edu    http://www.iit.edu/~segre