[Ifeffit] k weight in Athena

Dear All, I have a doubt about k-weights while extracting the signal in ATHENA. In athena Background removal panel conatins one button called k-weight. My question is how significant k weigths at the stage of background removal. Please explain Thanking You Mahendra -- Research Student Material Science Laboratory University of Hyderabad(india) X-ray Synchrotron Radiation Laboratory University of Trento(Italy)