Hello all, Athena and Artemis do not plot chi beyond 20 Å-1 or the Fourier transform beyond 10 Å. Is this a limitation of Athena/Artemis or of Ifeffit? Can it be changed? We have exafs data that may be usable almost to 21 Å-1, and with quite a strong FT peak (from a Pt atom) at 10.5 Å. The latter we would not even have noticed had we been using only Athena to process our data. The 10.5 Å peak raises another issue. I understand that Ifeffit by default assumes that the high-R region is pure noise in order to make its estimates of uncertainty. (I know the actual R-range that is used was mentioned recently but I can't find it in the list archives or any of my manuals.) Can this range be changed? Does anyone have any advice on how to deal with this issue? Thanks, Peter Peter Southon Postdoctoral Fellow School of Chemistry University of Sydney NSW 2006, Australia +61 2 9351 7482