0.2X0.05ND Aperture

Description

Supported neutral-density-filtered slit for use with bright objects with the echelle gratings. The dex ND factor is 2.0.

Special Considerations

Observations with this slit require a prior PEAKUP. This aperture can also be used with the CCD for ACQ/PEAKs.


Table 13.32: 0.2X0.05ND Throughputs.

λ

% Throughput

1150

0.18

1350

0.40

1550

0.49

1750

0.46

1950

0.39

2150

0.41

2350

0.48

2550

0.56

2750

0.61

2950

0.63

3150

0.60

Projected Length (arcsec)

Aperture

MAMA (E-modes)

Width (arcsec)

0.2X0.05ND

0.2

0.05

Figure 13.81: 0.2X0.05ND Aperture Throughput as a Function of Wavelength.