INTRODUCTION TO CGS4DR

• Introduction
  • Introduction to Portable--CGS4DR
  • What It Can Do
  • Version History
  • Some Basic Definitions
  • Files Used by the System
  • How Does Portable--CGS4DR Select Calibration Frames?
• Reducing Astronomical Array Data
  • Eliminating Data with Bad Pixel Masks
  • Reducing a Bias
  • Linearising the Data
  • Reducing a Dark
  • Reducing a Flat
• Reducing Spectroscopic Array Data
  • Reducing an Object, Sky or Arc
  • Wavelength Calibration
  • Sky Subtraction and the Propagation of Variance
  • Ratio-ing by a Standard Star
  • Flux Calibration
  • Extraction of Nodded Spectra