|STIS Instrument Handbook for Cycle 25|
Supported slit for use with the medium resolution echelle gratings. This slit is two pixels wide in dispersion for these gratings, providing optimal spectral resolution and line profiles.Used with E230M and E140M gratings. Observations with this slit require a prior PEAKUP.
Table 13.24: 0.2X0.06 Throughputs
Figure 13.71: 0.2X0.06 Aperture Throughput as a Function of Wavelength