On Thu, Aug 23, 2012 at 10:44 AM, Jim Pflugrath <[email protected]> wrote: > Singly-measured reflections should have a sigma from Poisson counting > statistics, so that should not be a problem. A problem might occur if the > X-ray background is exactly zero and the observed (sic) intensity is exactly > zero.
Or the data-processing program truncates the sigma to 0.0 because it writes it out in "%.1f" format... but maybe this has been fixed since the last time it happened to me? (For what it's worth, Xtriage throws out reflections where sigma=0; I imagine other programs do the same thing.) -Nat
