The ISO Long-Wavelength Spectrometer.
Omont, A.; Ade, P. A. R.; Liseau, R.; White, G. J.; Culhane, J. L.; Ceccarelli, C.; Burgdorf, M.; Serra, G.; Griffin, M. J.; Spinoglio, L.; Barlow, M. J.; Caux, E.; Cox, P.; Swinyard, B. M.; Molinari, S.; di Giorgio, A.; Lim, T.; Lorenzetti, D.; Nisini, B.; Trams, N. R.; Fischer, J.; Texier, D.; Smith, H. A.; Unger, S. J.; Saraceno, P.; Clegg, P. E.; Armand, C.; Church, S. E.; Furniss, I.; Glencross, W. M.; Gry, C.; King, K. J.; Naylor, D. A.; Orfei, R.; Nguyen-Q-Rieu; Baluteau, J. -P.; Sidher, S. D.; Rogers, A. J.; Emery, R. J.; Greenhouse, M. A.; Joubert, M.; Pequignot, D.; Towlson, W. A.; Davis, G. R.; Drummond, D. L.; Cotin, F.; Pouliquen, D.; Norman, K.; Cerulli, R.; Price, M. C.; Cruvellier, P.; Buckley, M. A.; Berges, J. -C.; Diplock, B. R.; Ewart, J. D.; Harwood, A. S.; Hazell, A. S.; Long, J. A.; Murray, A. G.; Patrick, T. J.; Robinson, F. D.; Saisse, M.; Smith, A. F.
Abstract
The Long-Wavelength Spectrometer (LWS) is one of two complementary spectrometers aboard the European Space Agency's Infrared Space Observatory (ISO) (Kessler et al., 1996A&A...315L..49D). It operates over the wavelength range 43-196.9μm at either medium (about 150 to 200) or high (6800 to 9700) spectral resolving power. This Letter describes the instrument and its modes of operation; a companion paper (Swinyard et al, 1996) describes its performance and calibration.