LARGE-SCALE MAP OF THE ORION MOLECULAR CLOUD/STAR FORMATION COMPLEX AT 200 UM

we propose to map the orion a molecular cloud complex, including omc1, omc2, and omc3, using the isophot c200 camera and the 200 um filter. our iso 200/100um mapping program of molecular clouds in the dlemke.isdust gt program has been very succesful and has shown that the isophot 200 um capability enables us to detect the very cold dust condensations in dense molecular cloud targets which are probably the earliest preprotostellar stages, most of them not detected by iras at 100 um. because of the visibility constraints the orion molecular cloud a was not included in our original autumn launch target list. neither is it being mapped at 200 um by any other iso observer(s). the orion a molecular cloud is, however, the beststudied star formation region in our neighbourhood. the isophot 200 um mapping would provide a new and unparalleled data set for orion mc. being the nearest highmass star formation region the orion mc can also serve as a template object for other, more distant star formation regions. > truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]