We thank the staff at the Heinrich-Hertz-Telescope for their enthusiastic support. Dr. W. Peters made available data of the pointing behavior of the telescope. The director of the SMTO, Dr. T. L. Wilson, made available observing time at the HHT. Dr. D. Muders and A. Nicol helped to observe a CO 3-2 spectrum of M 82. We thank Dr. R. Wielebinski for helpful discussions on the calibration and access to unpublished data. R.M. was supported by a Heisenberg fellowship by the DFG and by NATO grant SA.5-2-05 (CRG. 960086) 318/96 and thanks the MPIfR for its hospitality.
© European Southern Observatory (ESO) 1999
Online publication: November 26, 1998