Astron. Astrophys. 354, L1-L5 (2000)
We are grateful to Roberto Neri for his help during the data
reduction and analysis, all the IRAM staff for providing us with
excellent data and the referee, Francoise Combes, for helping in the
interpretation of these observations.
Part of this work was supported by the CNR contract progetto
strategico "Astronomia Submillimetrica" del Comitato Scienze
Fisiche . P.A. thanks MPE for hospitality during 1999 when this
work was done.
We dedicate this paper to the memory of the 25 people who lost their
lives in the tragedies of the Plateau de Bure cable-car and
© European Southern Observatory (ESO) 2000
Online publication: January 31, 2000