|STIS Instrument Handbook for Cycle 25|
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.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