Hello folks, I was asked to show the correction factor applied as a function of the photon energy. It is in http://www.slac.stanford.edu/~rfaccini/phys/vub/soff/corrf.eps Note that it is less dramatic than it looks like because the spectrum peaks at low values: http://www.slac.stanford.edu/~rfaccini/phys/vub/soff/fixedKs.eps ciao ric