Fig. 1
Images of the quasar field. Left: Subaru z′ image, Middle: Spitzer Ch2, Right: Herschel PACS 100 and 160 μm images combined (pixel scale 4″). The field of view is 3 × 3 arcmin. N is up and E to the left. The five unlabelled circles are examples of sources detected in PACS. Q marks the quasar, S the nearby bright star (Spitzer photometry, Sect. 2.3), and G the nearby galaxy (PACS photometry, Sect. 2.5.1).
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