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Reducing your data

This section gives a basic description of the LEXT functions that you will need to reduce your data. A more detailed description of LEXT is given in the LEXT Reference Manual (Appendix ii) and detailed descriptions of individual functions are available in the extensive on-line HELP facility.

• Distortion correction
  • Effects of distortions
  • Distortion mapping.
• Flatfielding
• Wavelength calibration
• Flux calibration
• Spectrum extraction