2 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