ctools

Background modeling is an area that should at least partly be done by the user (instead of pre-computed by the CTA collaboration and given to the user) to have flexibility.

I’d like to implement a ctool that takes a list of off runs, stacks the counts and does some smoothing to create a cube background model.

Using AGN observations should be possible, i.e. it also has to take a list of circles to cut out (typically one per run) and then correct for this by also filling livetime cubes.

• Name:`ctbgcube` or does someone have a better idea?
• Use FOV coordinate system (or sky system)?

For each instrument we will need extra scripts that determine good binnings in energy, X, Y, zenith angle, muon efficiency for a given set of cuts ... to get decent statistics, but they would use this ctool as a building block.

Once I have a prototype working we can discuss how to split this into sub-tasks, e.g. which smoothing and interpolation methods we want for this in Gammalib.

I think this is something that several of us have already worked on, If you have useful code, please attach it to this ticket or put it up on github.