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Astron. Astrophys. 315, L38-L42 (1996)

The ISO Long-Wavelength Spectrometer*

P.E. Clegg1, P.A.R. Ade1, C. Armand2, J.-P. Baluteau3,4, M.J. Barlow5, M.A. Buckley6, J.-C. Berges3, M. Burgdorf2, E. Caux7, C. Ceccarelli8, R. Cerulli8, S.E. Church9, F. Cotin7, P. Cox10,19, P. Cruvellier3, J.L. Culhane11, G.R. Davis12, A. Di Giorgio2, B.R. Diplock6, D.L. Drummond6, R.J. Emery6, J.D. Ewart2, J. Fischer13, I. Furniss5, W.M. Glencross5, M.A. Greenhouse14, M.J. Griffin1, C. Gry2,3, A.S. Harwood6, A.S. Hazell1, M. Joubert3,15, K.J. King6, T. Lim2, R. Liseau8,16, J.A. Long6, D. Lorenzetti17, S. Molinari2, A.G. Murray1, D.A. Naylor18, B. Nisini8, K. Norman11, A. Omont19, R. Orfei8, T.J. Patrick11, D. Péquignot20, D. Pouliquen3, M.C. Price2, Nguyen-Q-Rieu21, A.J. Rogers6, F.D. Robinson22, M. Saisse3, P. Saraceno8, G. Serra7, S.D. Sidher2, A.F. Smith6, H.A. Smith14, L. Spinoglio8, B.M. Swinyard6, D. Texier2, W.A. Towlson5, N.R. Trams2, S.J. Unger6, and G.J. White1

1 Queen Mary and Westfield College, University of London, Mile End Road, London E1 4NS, UK
2 The LWS Instrument-Dedicated Team, ISO Science Operations Centre, PO Box 50727, E-28080 Madrid, Spain
3 Laboratoire d'Astronomie Spatiale, CNRS, BP 8, F-13376 Marseille Cedex 12, France
4 Observatoire de Marseille, 2 place de Verrier, F-13248 Marseille, France
5 Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK
6 Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, UK
7 Centre d'Etude Spatiale des Rayonnements, CNRS, 9 avenue de Colonel Roche, F-31029 Toulouse, France
8 CNR-Istituto de Fisica dello Spazio Interplanetario, CP 27, I-00044 Frascati, Italy
9 Observational Cosmology, MC 59-33, California Institute of Technology, Pasadena, CA 91125, USA
10 Institut d'Astrophysique Spatiale, Bâtiment 120, Université de Paris XI, F-91405 Orsay, France
11 Mullard Space Science Laboratory, University College London, Holmbury St Mary, Dorking, Surrey RH5 6NT, UK
12 Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5E2, Canada
13 Naval Research Laboratory, Remote Sensing Division, 4555 Overlook Avenue SW, Washington, DC 20375, USA
14 National Air and Space Museum, Smithsonian Institution, Laboratory for Astrophysics, Washington, DC 20560, USA
15 CNES, 2 Place Maurice Quentin, F-75001 Paris, France
16 Stockholm Observatory, S-133 36 Saltsjöbaden, Sweden
17 Osservatorio Astronomico di Roma, I-00040 Monte Porzio, Italy
18 Department of Physics, University of Lethbridge, 4401 University Drive, Lethbridge, Alberta, T1K 3M4, Canada
19 Institut d'Astrophysique de Paris, CNRS, 98bis boulevard Arago, F-75014 Paris, France
20 Observatoire de Paris Meudon, Place Janssen, F-92190 Meudon, France
21 Observatoire de Paris, 61 avenue de l'Observatoire, F-75014 Paris, France
22 Code 717.3, NASA Goddard SFC, Greenbelt, MD 20771, USA

Received 5 August 1996 / Accepted 22 August 1996

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., 1996). It operates over the wavelength range 43 - 196.9 img1.gifm 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.

Key words: artificial satellites, space probes - instrumentation: spectrographs - infrared: general

* ISO is an ESA project with instruments funded by ESA Member States (especially the PI countries: France Germany, the Netherlands and the United Kingdom) and with the participation of ISAS and NASA.

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