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Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 22 > Chapter 13: Spectroscopic Reference Material > 0.2X0.09 Aperture

0.2X0.09 Aperture
Description
This slit is used with high 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 E140H and E230H grating only. Observations with this slit require a prior PEAKUP.
Table 13.26: 0.2X0.09 Throughputs
Figure 13.73: 0.2X0.09 Aperture Throughput as a Function of Wavelength

Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 22 > Chapter 13: Spectroscopic Reference Material > 0.2X0.09 Aperture

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