Hey folks, As an interface developer, I have to keep a broad perspective. It seems to me that, when Athena gets a rebinning capability, it should give the user a choice between boxcar and convolution (and whatever other technique someone makes a reasonable case for), thus I would want to implement something like what Ken or Shelly wrote as well as an interface to ifeffit's built-in convolution thingie. To address one of Matt's points, I reckon I'll put a flag in Athena's group object that would get set whenever E0 changes. That way Athena could automagically rebin the data before background removal for any data group for which rebinning has been requested. That combined with some of Athena's other automation features should make handling large amounts of qexafs data a breeze. As for which approach is appropriate, Grant pointed out that preserving resolution at high k is not completely necessary. I agree, but only with the caveat that your measurement is of a single edge. One could imagine using quick measurement techniques to measure two different, nearby edges --- perhaps for a dichroism experiment, perhaps simply to measure two exafs spectra. In that case, Matt's concern about boxcar is quite valid. That's not rocket science, but it would be easy to forget at the beamline at 3 in the morning ;-) Regards, B P.S. I really have to insist that everyone (and _especially_ the digest users) respect netiquette quoting guidelines. In the last few days there have been some egregious examples of poor netiquette on our lovely, little mailing list. Here's a nice explanation of how to quote when responding to another person's posting: http://earlydues.hispeed.com/ieel/netiquette.htm#quote -- Bruce Ravel ----------------------------------- ravel@phys.washington.edu Code 6134, Building 3, Room 222 Naval Research Laboratory phone: (1) 202 767 5947 Washington DC 20375, USA fax: (1) 202 767 1697 NRL Synchrotron Radiation Consortium (NRL-SRC) Beamlines X11a, X11b, X23b, X24c, U4b National Synchrotron Light Source Brookhaven National Laboratory, Upton, NY 11973 My homepage: http://feff.phys.washington.edu/~ravel EXAFS software: http://feff.phys.washington.edu/~ravel/software/exafs/