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

12.3. DATA SLICING WITH X SLICER 93
• Print the slicer display: will print the big table in a text file. The name of this file will be
the official name of the observation, with the .prn extension. For example: 1380302.prn.
• Save Slicer File: save the work done under a form re-usable by the slicer (see Handling big
datasets in the Advanced Slicing section).
• Quit: Quit x slicer.
• Back to last Choice: will redisplay the state of the slicing operation before you hit the
button ‘Redisplay’.
• Back to First Choice: will redisplay the first screen that appeared just after the slicing
proposal was computed.
• Back to Main Window: will go back to the x slicer window. WARNING: you will lose all
the slicing work that has been done, unless it has been saved.
The Advanced Slicing pull-down menu contains the list of all lens, filters, gains and integration
times used in your data, plus a Number of exposures menu.
12.3.6 Selecting SCDs and SSCDs
Let us now begin the real slicing work. Looking at the big board where the proposition of slicing
has been displayed, you will soon notice that there are many SCDs that you will not need,
especially in the beginning of observations and between two filters or PFOV when more than a
configuration was programmed in a single AOT. You now have to select which SCDs you want
to create and in which SSCD you want to put them.
Let’s examine together a concrete example:
Figure 12.2 displays the x handle slice for an observation of a cluster. This observation
consists of two 4x4 rasters made with the 3 arcsec PFOV lens, one with the LW2 filter, the other
with the LW3 filter.
Of course, we are going to make two different SSCDs with these ERD, one for the LW2 filter,
the other for the LW3 filter.
Let’s begin with the LW2 raster:
• First click on the ‘Unselect All SCDs’ button. All the ‘toggle’ buttons on the ‘Make your
Choice’ column are now unselected, and the ‘Merge’ buttons are insensitive.
• Select the ‘lwfil 2’ item in the Advanced Slicing/Filters menu. All LW2 SCDs are now
selected.
• Click on the ‘Redisplay’ button.
You are back in the same situation as before making any choices, but the x handle slice
window displays only data obtained with LW2 filter. A way to select the frames of our LW2
observation is to use the number of exposures: all the lens and filters motions take only a few
frames, but (in this case), at least 30 frames have been taken per raster position. Here it goes
again:
• First click on the ‘Unselect All SCDs’ button.