Recipes

1. Make a simple investigation of an image

       ILOAD image_file                 load the image
       IDISP                            display it
       ISCALE                           change scaling and colours
       ICOLOUR                          to highlight features
       IBROWSE                          browse around looking at data values
       ICONTOUR                         put on some contours
       IBOXSTATS                        statistics on sections of image
       ISLICE                           profiles of sections of image
       ICLOSE                           shut down
   

2. Refine background subtraction and source detection of a previously auto-subtracted and searched image

       ILOAD raw                        load unsubtracted, raw image
       IDISP                            display it
       IEX SOURCE LIST=source_list      remove auto-detected sources
       IPATCH                           patch up holes
       ISTATS                           get new peak values
       ISCALE                           change scaling to bring out peaks
       IPEAKS                           mark high spots
       IEX PIX                          remove other high spots
       IPATCH                           patch new holes
       ISAVE bgnd                       save to file
       ILOAD raw                        reload raw image
       ISUB bgnd                        subtract background
       IDISP                            display it
       .
       .
       ICLOSE
   

3. Investigate possible extended sources

       ILOAD image                      load image
       IDISP                            display it
       IZOOM                            zoom in on relevant section
       IBROWSE                          investigate data values
       ICONTOUR                         mark with contours
       IRADIAL                          plot radial distribution
       IPSF                             compare with point-spread-function
       IAZIM                            look for azimuthal variation
       .
       .
       ICLOSE
   

4. Investigate a specific area for an expected source

       ILOAD image                      load image
       IDISP                            display it
       IGRID 1                          put RA/DEC grid on it
       IZOOM                            zoom in on area of interest
       IMODE                            switch to keyboard mode
       IPOSIT (RA) (DEC)                find exact spot
       IBOXSTATS                        get max and min of small area
       ISCALE                           rescale to highlight features
       ICONTOUR                         put on contours
       .
       .
       ICLOSE