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6.4.1 Non-photometrically Corrected Image Regions

As discussed in Chapter 6.3 , the regions defined for PHOTOM either reside within an approximately circular boundary for high dispersion, or a diagonal swath encompassing the location of both apertures and a large area of background for low dispersion. All pixel locations which do not reside within these defined boundaries are not PHOTOMed and are flagged as -16384.

Karen Levay