Footprint of the APEX/LAsMA array on the 8 μm surface brightness images of H-MM1 (left) and Oph D (right) observed by the Spitzer satellite. The dashed and solid circles on the right represent two orientations of the array in observations towards Oph D. The positions of the central pixels are RA 16^h27^m58^s.5, Dec – 24°33′40″ (J2000.0) for H-MM1, and RA 16^h28^m30^s.2, Dec – 24°18′42″ for Oph D.