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Isaac Newton Group, La Palma

A User Guide to the INT Faint Object Spectrograph

D. L. King

May 1992

Version 2.0

• Contents
• List of Figures
• The INT Faint Object Spectrograph
  • Introduction
  • Hardware description
  • The CCD electronic system
  • Performance
• FOS Setup
  • Low level operations and calibration checks
    • Hardware changes
    • System checks
    • Focus and alignment.
• FOS Operation
  • Operation of FOS and astronomical considerations
    • Overview
    • Starting up
    • Preparing for observing
    • FOS observing modes
      • Beam switching or not?
      • Second order or not?
      • Switching Modes
    • Other variables
    • Other considerations
    • File Allocations
    • Data acquisition
• Data Analysis
  • Data Reduction
    • Introduction
    • Defect removal
    • Cosmic ray removal
    • Flatfielding
    • Spectrum extraction and Sky subtraction.
    • Flux calibration
    • Plotting data
• Appendix A - Field Lenses, Dekkers, and Observing Modes.
  • Field Lenses
  • Filters
  • Dekkers
• Appendix B - FOS Commands and Calibrations.
  • Glossary of on-line commands
  • Default Calibrations
  • Flux calibration
• Appendix C - Characteristics of the FOS CCD
  • CCD Format
  • Signal level calibration and readout noise
  • Other features of operation
  • Position of focus in the camera
• Appendix D - FOS reduction procedures.
  • Useful Procedures for Quick FOS Reduction