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Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 23 > Chapter 13: Spectroscopic Reference Material > 13.5 Spatial Profiles

13.5
Below we provide encircled energy tables for each grating mode. Included are the values for the fraction of the total flux contained in the default point source extraction aperture (not the same as the physical aperture) during pipeline processing. calstis, the pipeline code, sums a number of pixels to obtain the spectral flux°; this number of pixels is given by the “Extraction Height.” These 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).

Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 23 > Chapter 13: Spectroscopic Reference Material > 13.5 Spatial Profiles

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