Example of background confusion noise around the star HD 159330 (OBSIDs 1342213583-86 on OD 628, see Tables A.3 and A.4, available in electronic form at CDS, for details) by comparing maps in the three filters 70, 100, and 160 μm. At 160 μm both the high-pass filtered and the JScanam maps are shown to explore the nature of the background sources. The red cross (arm length equal to 5′′) indicates the best common Herschel position of the star after frame centering at RA = 17:30:43.69 and DEC = +57:52:36.0.