Theta squared only works for simulated data

[maxnoe]

A more general way to define this, would be to give two arrays of precomputed theta values for on and off measurements.

[vuillaut]

Why does it work only for simulated data?
Ok everything is called simu_ but to compute it on a real source, you could pass the reconstructed values and the expected values, no?

[maxnoe]

For a real source, you would also want to plot off events with a weight alpha