A standard recipe for linear polarimetry

• Instrumental setup
• How to derive the Stokes parameters
• Sky subtraction
• Flat fields
• Scattered light
• Calibration of linear polarimetry
  • Degree-of-polarization scale
  • Polarization angle
  • Instrumental polarization zeropoint
• Reduction; some suggestions
• Noise and statistics in polarimetry
  • Photon noise calculation
  • Statistics
• Nuggets and wrinkles
  • Daytime use of WHT
  • Cosmic rays
  • Variable sources
  • Dekker masks
  • ``Data Lost''