ctools

This would be analogous to creating an excess map, right? This can already be achieved by csresmap, if the user removes the sky models from the model XML file. The advantage in csresmap is that the background scale factors are also taken into account when subtracting the background. My alternative proposal would be to add an option to csresmap that ignores the sky models (using option “SUB) and creates an excess map. What do you think?

Mayer Michael wrote:

This would be analogous to creating an excess map, right? This can already be achieved by csresmap, if the user removes the sky models from the model XML file. The advantage in csresmap is that the background scale factors are also taken into account when subtracting the background. My alternative proposal would be to add an option to csresmap that ignores the sky models (using option “SUB) and creates an excess map. What do you think?

I agree that there is some overlap, but the difference would be that ctskymap won’t take a model, but simply includes methods for background subtraction (template background, ring background, etc.). In contrast, csresmap will subtract a model.

Ok I think I understand the philosophy. Accordingly, ctskymap should become a tool that allows image analyses, in particular regarding classical methods.

Mayer Michael wrote:

Ok I think I understand the philosophy. Accordingly, ctskymap should become a tool that allows image analyses, in particular regarding classical methods.

This was indeed my initial intention.

The output of ctskymap could then be used by another tool (or script) that recognizes for example excesses in a sky map and derives an XML model from that. This XML model would then be injected into ctlike for model fitting, and csresmap would be used to inspect the residuals. One could in principle also apply the excess finding tool to residual maps to improve the XML model.