Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 14

Echelle Spatial Profiles

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Table 13.38: Encircled Energies for Echelle M Modes

Grating		Slit	Extraction Height (pixels)	Flux in Center Pixel	Flux in Extraction Aperture
E140M	1170 1400 1600	0.2X0.21	7	0.274 0.308 0.331	0.944 0.959 0.961
E230M	1900 2550 3000	0.2X0.2	7	0.347 0.359 0.391	0.973 0.947 0.949

1Values are only weakly dependent on observing slit.

Figure 13.87: Echelle M Modes Spatial Profiles


 

Table 13.39: Encircled Energies Echelle H Modes

Grating		Slit	Extraction Height (pixels)	Flux in Center Pixel	Flux in Extraction Aperture
E140H	1170 1400 1600	0.2X0.21	7	0.276 0.300 0.335	0.948 0.983 0.981
E230H	1700 2550 2700	0.2X0.2	7	0.323 0.382 0.342	0.970 0.979 0.968

1Values are only weakly dependent on observing slit.

Figure 13.88: Echelle H Mode Spatial Profiles


 

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