Changes between Version 111 and Version 112 of DatabaseBasedAnalysis/Spectrum
- Timestamp:
- 12/05/19 10:59:28 (6 years ago)
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DatabaseBasedAnalysis/Spectrum
v111 v112 6 6 Often \(\phi(E)\) is also referred to as \(\frac{dN}{dE}\) as observation time and effective collection area is a constant. The effective area is then defined as \(A_\textrm{eff}(E)=\epsilon(E)\cdot A_0\). Note that at large distances \(R_0\) the efficiency \(\epsilon(R_0)\) vanishes, so that the effective area is an (energy dependent) constant while \(A_0=\pi R_0^2\) and the efficiency \(\epsilon(E)\) are mutually dependent. 7 7 8 For an observation with an effective observation time \(\Delta T \), this yields in a given Energy interval \(\Delta E\):8 For an observation with an effective observation time \(\Delta T=\sum\delta t_i\), this yields in a given Energy interval \(\Delta E\): 9 9 \[\phi(\Delta E) = \frac{1}{A_0\cdot \Delta T}\frac{N(\Delta E)}{\epsilon(\Delta E)\cdot \Delta E}\] 10 10