[Ifeffit] Statistical errors in linear combination fits

[Bruce Ravel]

On 08/11/2016 04:31 PM, Joshua Kas wrote:
> I was wondering if it is possible to pass a value for the uncertainty in
> the data to Athena when doing linear combination fits. We have
> calculated chi^2 values using a simple estimate of the statistical
> uncertainty, and find that our values differ by several factors of 10
> when compared to the reported values from Athena. I assume that this has
> to do with value of the uncertainty that Athena is using, but I
> certainly could be mistaken. In any case, the reduced chi^2 reported by
> Athena is much smaller than 1, while the fit is off by fairly large
> amounts compared to any reasonable estimate of the statistical error.

Not so easy with Ifeffit, quite easier with larch.  It's on my to do 
list, but has not yet been implemented in Athena.

B

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  Bruce Ravel  ------------------------------------ bravel at bnl.gov

  National Institute of Standards and Technology
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