Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 14

Chapter 4:
Spectroscopy

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4.1 Overview
    4.1.1 Throughputs
    4.1.2 STIS vs. ACS Spectroscopy
    4.1.3 Limiting Magnitudes
    4.1.4 Saturation
    4.1.5 MAMA Bright-Object Limits
    4.1.6 Scanned Gratings: Prime and Secondary (Tilt) Positions
    4.1.7 Cross-Over Regions
4.2 First-Order Long-Slit Spectroscopy
    4.2.1 Gratings for First-Order Spectroscopy
    4.2.2 Slits for First-Order Spectroscopy
    4.2.3 STIS Pseudo-aperture Positions
    4.2.4 Detailed First-Order Spectroscopic Information
4.3 Echelle Spectroscopy in the Ultraviolet
    4.3.1 Echelle Gratings
    4.3.2 Slits for Echelle Spectroscopy
    4.3.3 Detailed Echelle Information
4.4 Objective-Prism Spectroscopy

In this chapter, we provide information to help you choose the most appropriate spectroscopic configuration for your scientific program. We briefly describe the properties of each grating mode and its associated slits, and provide an overview of their scientific uses. Curves of sensitivity, the central wavelengths and wavelength ranges for the grating settings, detailed aperture throughputs and line-spread functions referenced in this chapter are all presented in Chapter 13.

For MAMA spectroscopy there are bright-object limits. We mention these limits here, and describe them in detail in Chapter 7. Tables of the MAMA spectroscopic bright-object screening magnitudes by spectral type and mode are presented in Chapter 13.

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