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How to treat limited background statistics #45

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@maxnoe

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@maxnoe

The the current implementations of calculating sensitivities use different approaches of handling the limited background statistics, especially when rather hard cuts are applied.

Possible solutions:

  • Increased background region size by using an alpha << 1 and then just do the normal calculations with that alpha

  • Using all background events without a directional cut and then scale the number to the size of the off region, so basically the off region is the whole fov and alpha calculated according to the on region size.

Other approaches?

What are advantages and disadvantages?

What is used in EventDisplay (@GernotMaier) and what is used in MARS-CTA (@moralejo)?

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