Space Telescope Science Institute  3.2 The APT Visual Target Tuner (VTT) and Aladin 4.1 Filters and Optical Elements

Chapter 4:
Imaging

In this chapter...
Filters and Optical Elements
Photometry
Focus History
Image Quality
Cosmic Rays
Photon and Cosmic Ray Persistence
The Infrared Background
The "Pedestal Effect"

3.2 The APT Visual Target Tuner (VTT) and Aladin 4.1 Filters and Optical Elements
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