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| Space Telescope Science Institute |
| STIS Instrument Handbook |
| help@stsci.edu |
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Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 20 > Chapter 13: Spectroscopic Reference Material > 0.2X0.05ND Aperture
Supported neutral-density-filtered slit for use with bright objects with the echelle gratings. The dex ND factor is 2.0.Observations with this slit require a prior PEAKUP. This aperture can also be used with the CCD for ACQ/PEAKs.
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