The two images on the covers of this Newsletter show the jet from the class 0 young stellar object VLA1623 observed with JCMT and UKIRT. The back cover is the blue-shifted emission from J=3-2 12CO. This highly collimated flow has an opening angle of less than 10 degrees, and total length in CO of approximately 9 arcmin (0.4 pc). There is evidence of wiggles in the line of strongest emission, superimposed on an underlying cylindrical morphology, which suggests either a precessing or locally unstable high-velocity jet is accelerating the molecular gas. The front cover shows the region in shocked H2, taken with IRCAM3 on UKIRT. The three brightest objects are scattered continuum nebulae; however, several regions of the CO jet (eg at coordinates 100,-45" and -110,+85") are associated with H2 clumps and "streamers". This would indicate the presence of recently shocked hot gas.

The CO map was made by a prototype "on-the-fly" raster mapping technique using the DAS and RxB3i under rather poor weather conditions (Tsys~1500 K at 345 GHz). The map contains approximately 1700 spectra, each of 5 seconds integration. Total map size is 4 Mbytes. Continuous sampling is carried out while rastering the telescope across the object. At the end of each row, a single reference position is observed, with a calibration every few rows. Axes in both maps are given in arcseconds offset from the central embedded object VLA1623.

W.R.F Dent, D.M. Walther & H. Matthews, JAC

S. Chakaveh, University of Göttingen.