13.5 Spatial Profiles

In this section, we provide encircled energy tables for each grating mode, giving the fraction of the total flux contained in the default point source extraction aperture (which is not the same as the physical aperture used for the observation) during pipeline processing. The pipeline code, calstis, sums a number of pixels (given by the "extraction height") to obtain the spectral flux; the default values are 11 pixels for the MAMAs and 7 pixels for the CCD.  The tables also give the fractional flux in the peak pixels. Accompanying figures show sample spatial profiles (i.e., in the direction perpendicular to the dispersion), given in terms of the encircled energies. See ISR 2018-06 for a recent discussion of the encircled energies.