GammaLib

While energy thresholds of each run are specified and used in ctselect. ctexpcube should skip bins outside thresholds when adding the exposure. This functionality should go to fill() in GCTAExposure.

Nevertheless, I am not sure what the best approach is to do this. One has to make the emin of each run consistent with what is used in ctselect (either given by users or by headers).

I would suggest

option1: ctselect adds emin and emax used for selection in the output xml file.

option2: ctselect adds a new hdu in the output fits file to store the energies used for selection. (EOI = Energy of Interest?)

I personally prefer option 1. What do you think?