There are particular sidelobe confusion problems in the area around the exceptionally strong supernova remnant CAS A. Two maps observed at different parallactic angles have been made (Figs. 1 (click here)a and 1b). We have reduced this field in a different way aiming for a maximum reduction of the disturbing sidelobes. We computed the differences between the two maps. The sources disappear, but the sidelobes show up either positive or negative because of their different positions. Clipping the sidelobe effects of the second map and subtracting the result from the first map reduces their effects substantially. Similarly, the second map is improved (Figs. 2 (click here)a and 2b). Both maps are added and included in the survey maps (Figs. 3 (click here) and 4 (click here)).
Figure 1: a and b)Strong sidelobe distortions from CAS A. The two maps have been
observed at different parallactic angles. Contour steps are the
same as for Fig. 3 (click here) and listed in Sect. 5 (click here)
Figure 2: a and b)
Sidelobe corrected maps of the CAS A area as described
in Sect. 4 (click here)
Figure 3: a-l) The atlas of contour maps in Galactic coordinates ordered for increasing
longitude showing the "source component"
(see Sect. 3 (click here)). Contour steps are listed
in Sect. 5 (click here)
Figure 3: continued
Figure 3: continued
Figure 4: a-l)
As Fig. 3 (click here), but showing the "diffuse component" (see Sect. 3 (click here)).
Contour steps are listed in Sect. 5 (click here)
