The Long Wavelength Spectrometer (LWS)

The UK ISO LWS instrument information, documentation and software web pages.

The UK ISO Data Centre is part of the consortium responsible for LWS, a spectrometer operating between 43 and 197 microns. LWS had a grating mode (resolving power 200) and a Fabry-Perot mode (resolving power 10000). ISO had four scientific instruments on board, one of which was LWS, and it made observations of specified astronomical objects. The observations were processed using OLP (Off-Line Processing) software and are accessible via the ISO Data Archive. In addition, LWS operated parallel mode observing (taking data while another instrument was operating) and serendipity mode observing (taking data while ISO slewed from one object to the next). The LWS instrument team, via the UKIDC, is responsible for:

• Analysis of instrument and detector behaviour
• Provision of instrument-specific software and tools (OLP, LIA), including testing, validation, and documentation
• Instrument-specific calibration and generation of new calibration files
• Contributions to the instrument-specific parts of ISO cross-calibration
• Liaison with IDC (ISO Data Centre in Spain)
• Support to instrument consortia and national community; support to others on a best-effort basis.

ISO LWS data are analysed using ISAP (ISO Spectral Analysis Package). Users can interactively reprocess their data using the LIA (LWS Interactive Analyis) package before doing the data analysis using ISAP.

For more information about ISAP, go to the ISAP page.

For more information about LIA, go to the LIA page.

To obtain Version 10.2 of LIA (released on 1 September 2003), go to the LIAv10.2 page.

Information about the LWS Consortium

For more information about the instrument itself, look on the ISO Guided Tour page.