0.1X0.03 Aperture

Description

This slit provides the highest spectral resolution of any STIS slit and is restricted to use with the MAMA echelle gratings. Tests during ground calibration with this slit to obtain MAMA exposures of a mono-isotopic platinum lamp source produced resolving powers in excess of 200,000.

Special Considerations

Observations with this slit require a prior PEAKUP. The PEAKUP is performed in two stages—first with the 0.2X0.09 aperture (or one of the small neutral density apertures), and then with the 0.1X0.03 aperture.


Table 13.28: 0.1X0.03 Throughputs.

λ

% Throughput

1200

19.9

1800

31.4

2400

36.0

3000

36.3

3600

34.8

4200

32.8

4800

30.9

5400

28.9

6000

27.0

Projected Length (arcsec)

Aperture

MAMA (E-modes)

Width (arcsec)

0.1X0.03

0.1

0.025

Figure 13.75: 0.1X0.03 Aperture Throughput as a Function of Wavelength.