STIS Spectroscopic Capabilities


To simplify instrument operation and calibration, only specific grating tilts with corresponding central wavelengths are implemented (See the HST Phase II Proposal Instructions).

Spectral format plots for each combination of detector, optical element and central wavelength are available.

Only a portion of the full spectral range falls on the detector for the intermediate-resolution first-order and the echelle (except E140M) gratings. Therefore separate exposures must be taken for these gratings for full wavelength coverage.


Last Updated: 06/02/2023


HST Help Desk 

Please contact the HST Help Desk with any questions.