These observations are part of the LWS-Guaranteed Time Program and as such are the results of a joined effort of all the ISO-LWS team. B. Nisini wishes to thank the SRON in Groningen for its hospitality for processing the data, and in particular Adwin Boogert for his kind assistance in the data reduction. This research has been financially supported by the Italian Space Agency (ASI), the italian Consiglio Nazionale delle Ricerche (CNR) and the Ministero dell'Università e della Ricerca Scientifica e Tecnologica (MURST).
© European Southern Observatory (ESO) 1998
Online publication: June 2, 1998