Fig. 1

Southern blueshifted outflow lobe observed in CO (1–0) with the Plateau de Bure Interferometer (PdBI) by Gueth et al. (1996). The black cross marks the nominal position of the bow-shock L1157-B1 while the white × symbol indicates the nominal position of the B2 shock (Bachiller & Pérez Gutiérrez 1997). The largest (~38′′) and smallest (~12) HIFI main-beams are indicated with circles. The field of view of the PACS observations is displayed with a white box. The star depicts the position of the protostar L1157-mm.
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