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STIS Instrument Handbook
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Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 22 > Appendix A: Available-But-Unsupported Spectroscopic Capabilities > A.1 Introduction

A.1 Introduction
STIS provides additional Available-but-Unsupported capabilities beyond those which will be routinely supported. Section 2.3 describes the distinction between supported and available-but-unsupported modes, and the policy with regard to the use of the latter. A mode is a combination of aperture, optical element (and central wavelength setting), and detector.
This appendix to the STIS Instrument Handbook indicates which modes are supported and gives information about the additional Available-but-Unsupported modes of STIS. Since all of the imaging capabilities are supported, it contains information relevant to spectroscopic observations only. Numerous entrance slits or apertures are supported for a limited set of optical elements and available for others, or are used in available mode only. A small number of central wavelength settings have been removed from the set of supported settings due to difficulties with them (e.g., order overlap).

Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 22 > Appendix A: Available-But-Unsupported Spectroscopic Capabilities > A.1 Introduction

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