ISOCAM Interactive Analysis User's Manual Version 5.0 - ISO - ESA

124 CHAPTER 14. IMAGE ANALYSIS AND DISPLAY
14.3.1.2 xdisp examples
1. Following the examples of Section 12.2 we can examine the raster image in the raster PDS.
Figure 14.4 was created with this example.
CIA> xdisp, lw6_raster.raster, raster2hdr(lw6_raster)
In the above example, the routine raster2hdr is used to create a FITS header from the
PDS lw6 raster and this header is passed directly to xdisp. This is particularly useful for
getting coordinates of raster MOSAIC pixels (see description of menu option get / cursor
in Section 14.3.1.1).
We can also use the select and save a selected region of the image to a FITS file (see
description of menu option ROI). Since we have supplied a FITS header to xdisp then
the FITS file will contain astrometry for the selected region. For example, click on ROI
/ select and use the mouse to drag the selection zone over the region you are interested
in saving (watch the screen for information). After selection is completed click on ROI /
save to save the selected region. You will get a screen message like:
File ima33x33.fits written ...
The FITS file can be used as input to isocont – see Section 14.6.2.
2. Using xdisp for viewing FITS data in CIA:
CIA> haro3_image=readfits(’haro3_iso.fits’, haro3_header)
CIA> xdisp, haro3_image, haro3_header
3. xdisp is designed to directly read SADs from disk or memory and display the contents of
the CCIM.DATA field:
CIA> xdisp, ’CSAD143006010205_96090620365354’
14.3.2 sad display and struct2sad
In section Section 10.2 we used sad display to create SADs from CCIM and CMOS data
products and then display their corresponding EXPOSUREs and MOSAICs. We were only
concerned with viewing AAR data products at that time.
However, since we can create an SSAD from a PDS using struct2sad we can use sad display
to view the results of our own calibration.
Here are some examples:
1. Any PDS can be converted to an SSAD and viewed with sad display:
CIA> sad_display, struct2sad(any_pds, /all)
The optional keyword all tells struct2sad to make a complete as possible set of SADs. If
any pds is a raster PDS or BS PDS, then clicking on the button future (see Figure 10.1)
will display the raster or beam-switch MOSAIC.
2. If you only want to see the raster or beam-switch MOSAIC then set the keyword raster:
CIA> sad_display, struct2sad(raster_pds, /raster)