# Changes between Version 21 and Version 22 of DatabaseBasedAnalysis/Spectrum

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Timestamp:
Dec 3, 2019, 5:23:08 PM (10 months ago)
Comment:

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 v21 Note that the exact calculation of the efficiency $$\epsilon(\Delta E)$$ depends on prior knowledge of the correct source spectrum $$N_0$$. 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 $$N_0$$. === Excess === The number of excess events, for data and simulations, is defined as $\hat N_\textrm{bg} = \frac{N_\textrm{bg}}{5}$ === Theta and Spectral Weights === While the source spectrum $$N_0$$ is of course independent of the zenith angle $$\theta$$ of the observation, the efficiency is not, so that $\epsilon(E) = \epsilon(E, \Theta$ == Define Binnings ==