LWS Instrument Page

We recommend the ISO Handbook, Volume III: LWS - The Long-Wavelength Spectrometer as a general reference point. Latest updates and further details on calibration can also be found in technical notes and publications available below.

Highly Processed Data Products (HPDP)

The following reprocessed data sets are available containing LWS observations made with ISO and are recommended for scientific usage:

• Uniformly reprocessed LWS01 spectra, December 2003, C. Lloyd et al.

Basic LWS Information

• ISO Handbook, Volume III: LWS - The Long-Wavelength Spectrometer, Version 2.1 (17/Nov/2003)
• Version 10.1 of the ISO Off-Line Processing (OLP) software released (20/Nov/2001)
• LWS OLP10 Scientific Validation Report (05/Apr/2001)
• The ISO Long-Wavelength Spectrometer, Clegg P.E. et al., A&A, 315, L38-L42 (1996).

Data Analysis

• 2 packages are available for further analysis
• The LWS Interactive Analysis (LIA) to inspect, reprocess and recalibrate LWS data
• ISO Spectroscopic Analysis Package (ISAP) to work with the fully processed spectra
• Some useful recipes have been written to guide the user and help him decide what data reduction steps are required for his particular data.

  Calibration

  Different aspects of the LWS calibration, which may be of relevance to future space missions are addressed in detail in the following papers:
  • "Pre-flight Calibration of the LWS" - T. Lim & B. Swinyard
  • "The LWS Calibration Strategy" - T. Lim et al.
  • "The LWS Relative Spectral Response Function" - T. Lim & B. Swinyard
  • "Empirical Aspects of the LWS Photometric Calibration" - S. Sidher et al.
  • "The Calibration of the LWS Parallel and Serendipity Modes" - T. Lim & F. Vivares
  • "Wavelength Calibration and Instrumental Profiles of the ISO-LWS Grating" - C. Gry et al.
  • "The ISO LWS Beam Profile" - C. Lloyd

  Additional LWS Documents

  These additional LWS documents describe aspects of the instrument in some detail and only need to be read for a deep understanding of a particular aspect. But be aware that the reports sometimes reflect "work in progress" and may have been superseded.

  See also the proceedings of several ISO Conferences and Meetings for specific instrument related topics.

  LWS Institute Links

  • The UK ISO Data Centre at the Rutherford Appleton Lab (RAL)
  • US ISO Science Support Center at the Infrared Processing and Analysis Center (IPAC)

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