Addendum to
ISOPHOT OBSERVER'S MANUAL

SAI/96-171/Doc
Version 1.0
5 August 1996

Prepared by R.J. Laureijs, U. Klaas
D. Lemke, U. Herbstmeier, P. Abraham

• Contents
• Introduction
• Sections in the IOM3.1 affected by this document
• Capabilities, instrument modes, and AOTs
  • Chopping
  • Raster mode
  • Sparse maps
• General performance overview
  • Overview
  • Photometric sensitivities
  • Sensitivity and calculation of observing times
  • Sensitivity limits
  • Saturation limits
  • Targets that cannot be observed for safety reasons
• Photometric accuracy
• The Cookbook
  • Guidelines to AOT selection
  • Astronomical considerations when using the instrument
    • Chopper avoidance region
    • Scan orientation and tolerance angle
    • Determination background flux level
  • Overheads
    • General
    • Estimation of the target dedicated time for an AOT
    • Scans and (raster)maps
    • FCS measurements
    • Concatenated observations
  • Absolute photometry in single pointing mode: PHT05 and PHT25
    • Observing Parameters
    • Worked Example
  • Oversampled Maps and Scans - PHT32
  • Polarimetry - PHT50 and PHT51