Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 17

0.2X0.06 Aperture

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Description

Supported slit for use with the medium resolution echelle gratings. This slit is two pixels wide in dispersion for these gratings, providing optimal spectral resolution and line profiles.

Special Considerations

Used with E230M and E140M gratings. Observations with this slit require a prior PEAKUP.

Table 13.24: 0.2X0.06 Throughputs

	% Throughput
1200	23.0
1800	50.2
2400	56.7
3000	58.9
3600	59.2
4200	58.7
4800	57.2
5400	55.1
6000	52.4

Aperture	Projected Length (arcsec) (MAMA E-modes)	Width (arcsec)
0.2X0.06	0.2	0.06

Figure 13.71: 0.2X0.06 Aperture Throughput as a Function of Wavelength