Upper internal part of the BHR71 outflow. The background map is the same as in Fig. 1. The SiO (5–4) contours, which are overlaid in a dark blue colour, correspond to levels of 6 to 30σ, in steps of 3σ, for an integration between  − 10 and 60 km s^-1. The half-maximum, 15σ contour is displayed in red. The associated beam size is indicated in the upper left corner. Our SiO (5 − 4) coverage is actually wider than the field displayed in this figure.