... Background scans are automatically loaded with the get_data procedure, but can be manually loaded, for example after computing the biases when the background has been zeroed before, using the following procedure. get_bgdata Backgroundtable created. ... We flag these data manually (just plot channel 11 and then use Util|Edit to flag; re-plot to check whether all the data has been flagged); when OYSTER averages point data, any data without valid background scans will be discarded. ...