Hi Andrew,
If you are fitting XANES spectra with
standards, a large source of uncertainty can come from the representation of
the standards in matching the species in the sample.
Shelly
From: ifeffit-bounces@millenia.cars.aps.anl.gov
[mailto:ifeffit-bounces@millenia.cars.aps.anl.gov] On Behalf Of Andrew
Sent: Thursday, October 02, 2008
3:49 PM
To:
ifeffit@millenia.cars.aps.anl.gov
Subject: [Ifeffit] What confidence
limit is implied in the error bars forleast-squares fitting in Athena
Hi
everyone,
I’m
fitting data with the least-squares method in Athena and am not sure what the
error bars correspond to. What I mean, are these 95% confidence limits, or is
it some other statistical way for error analysis? If Athena says the
weight of one phase is 0.049 (0.003), what confidence are in the 0.003 error
bar reported by Athena?
(I
have done a PCA of the XANES, and XRDs of the samples and am pretty confident
in the phases that I’m fitting).
I
greatly appreciate the help!
Andrew
Campos