Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 17

52X0.2 Aperture

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Description

This is the "utility" slit used with first-order gratings and the prism. It provides a good compromise between spectral resolution and photometric throughput.

Special Considerations

Observations using this slit do not need to be preceded by a PEAKUP.

Table 13.20: 52X0.2 Throughputs

	% Throughput
1200	39.8
1800	75.2
2400	80.0
3000	82.9
3600	84.6
4200	86.0
4800	86.7
5400	86.9
6000	86.4
6600	85.4
7200	83.8
7800	82.3
8400	81.2

	Projected Length (arcsec)
Aperture	CCD	MAMA (M-modes)	MAMA (L-modes)	Width (arcsec)
52X0.2	52.0	28.0	25.0	0.2

Figure 13.67: 52X0.2 Aperture Throughput as a Function of Wavelength