Changes between Version 250 and Version 251 of DatabaseBasedAnalysis/Spectrum


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Timestamp:
12/10/19 14:25:26 (5 years ago)
Author:
tbretz
Comment:

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  • DatabaseBasedAnalysis/Spectrum

    v250 v251  
    2424
    2525where \(N_0\) is the number of simulated events in this energy bin and \(N=N_{exc}\) the number of *excess* events that are produced by the analysis chain.
     26
     27The effective collection area is then defined as \(A_\textrm{eff}(E) = A_0\cdot\epsilon(E)\). The result is idependent of the simulated area as long as the simulated area is large enough. In this case, the efficiency degrades inversely proportional to the increase of the area.
    2628
    2729Note that the exact calculation of the efficiency \(\epsilon(\Delta E)\) depends on prior knowledge of the correct source spectrum \(N_0(E)\). Therefore, it is strictly speaking only correct if the simulated spectrum and the real spectrum are identical. As the real spectrum is unknown, special care has to be taken of the systematic introduced by the assumption of \(N_0(E)\).