XMM-Newton Science Analysis System


emdiag (emdiag-4.1) [22.0.0-9173c7d25-20250127]

Algorithm

   subroutine emdiag

   Read the file names of input and output files

   Open files 
   Get keyword values   
 
   parameters read : choice of sub_tasks to execute
   Loop over input task parameters
      Read the task parameter / yes to perform the procedure,
                                no  not to perform it  /
   End loop

   Read CCD map

SUBROUTINE OFFSET 
   if offset requested  then
      mask out pixels with significant signal
      compute mean over rows and columns
      if selectfov then
         mask out pixels outside the field of view
         for all rows/columns with more than 4 pixels left
             recompute offset
      endif
      compute variance
   else
      read offsets from offset/variance file
   endif

SUBROUTINE EDUSOFT
   if edusoft requested  then
      simulate EDU action
      simulate EMDH thresholding
      mask out pixels belonging to valid events
   endif

SUBROUTINE THRESH
   if thresh requested  then
      subtract offsets
      identify pixels above EMDH lower threshold
      mask them out in map
   endif

   Write output files
   Close files

   end subroutine  emdiag