Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 14

First-Order Spatial Profiles

---

Table 13.35: Encircled Energies for G140L, G140M, G230L, G230M

Grating1		Slit2	Extraction Height (pixels)	Flux in Center Pixel	Flux in Extraction Aperture
G140L & G140M	1200 1400 1700	52X0.2	11	0.2049 0.2655 0.2703	0.8197 0.8850 0.9009
G230L & G230M	2000 2500 3000	52X0.2	11	0.2838 0.3272 0.3182	0.9009 0.9091 0.9091

1M mode profiles are assumed to be identical to L mode profiles. 2Values are only weakly dependent on observing slit.

Figure 13.84: G140L, G140M, G230L, G230M Spatial Profiles

Table 13.36: Encircled Energies for G230LB and G230MB

Grating1		Slit2	Extraction Height (pixels)	Flux in Center Pixel	Flux in Extraction Aperture
G230LB & G230MB	2000 2500 3000	52X2	7	0.3008 0.3390 0.3017	0.8130 0.8475 0.8621

1M mode profiles are assumed to be identical to L mode profiles. 2Values are only weakly dependent on observing slit.

 
Figure 13.85: G230LB and G230MB Spatial Profiles


 

Table 13.37: Encircled Energies for G430L, G430M, G750L, G750M

Grating1		Slit2	Extraction Height (pixels)	Flux in Center Pixel	Flux in Extraction Aperture
G430L & G430M	3000 4000 5000	52X0.2	7	0.4299 0.3551 0.3879	0.9348 0.9346 0.9346
G750L & G750M	5500 7000 9000	52X0.2	7	0.3163 0.3571 0.1985	0.9302 0.8929 0.7353

1M mode profiles are assumed to be identical to L mode profiles. 2Values are only weakly dependent on observing slit.

Figure 13.86: G430L, G430M, G750L, and G750M Spatial Profiles


 

	Space Telescope Science Institute http://www.stsci.edu Voice: (410) 338-1082 help@stsci.edu