A comparison between Sim4 with different background levels

Below compares Sim4,V9 (left) and Sim4_x2,V9 (right):

* Input -- output fluxes

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* Input -- output counts

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* Detection fraction as a function of input counts

[ATTACH] [ATTACH] Sim4,detection fraction

* Detection fraction as a function of input fluxes

[ATTACH] [ATTACH] Sim4,detection fraction

* Spurious fraction

[ATTACH] [ATTACH] Sim4,spurious fraction

* logN-logS based on ersensmap (Sim3,V8)

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