IRFStacker¶
-
class
gammapy.irf.
IRFStacker
(list_aeff, list_livetime, list_edisp=None, list_low_threshold=None, list_high_threshold=None)[source]¶ Bases:
object
Stack instrument response functions.
Compute mean effective area and the mean energy dispersion for a given for a given list of instrument response functions. Results are stored as attributes.
The stacking of \(j\) elements is implemented as follows. \(k\) and \(l\) denote a bin in reconstructed and true energy, respectively.
\[ \begin{align}\begin{aligned}\begin{split}\epsilon_{jk} =\left\{\begin{array}{cl} 1, & \mbox{if bin k is inside the energy thresholds}\\ 0, & \mbox{otherwise} \end{array}\right.\end{split}\\\overline{t} = \sum_{j} t_i\\\overline{\mathrm{aeff}}_l = \frac{\sum_{j}\mathrm{aeff}_{jl} \cdot t_j}{\overline{t}}\\\overline{\mathrm{edisp}}_{kl} = \frac{\sum_{j} \mathrm{edisp}_{jkl} \cdot \mathrm{aeff}_{jl} \cdot t_j \cdot \epsilon_{jk}}{\sum_{j} \mathrm{aeff}_{jl} \cdot t_j}\end{aligned}\end{align} \]- Parameters
- list_aefflist
list of
EffectiveAreaTable
- list_livetimelist
list of
Quantity
(livetime)- list_edisplist
list of
EDispKernel
- list_low_thresholdlist
list of low energy threshold, optional for effective area mean computation
- list_high_thresholdlist
list of high energy threshold, optional for effective area mean computation
Methods Summary
stack_aeff
(self)Compute mean effective area (
EffectiveAreaTable
).stack_edisp
(self)Compute mean energy dispersion (
EDispKernel
).Methods Documentation
-
stack_aeff
(self)[source]¶ Compute mean effective area (
EffectiveAreaTable
).
-
stack_edisp
(self)[source]¶ Compute mean energy dispersion (
EDispKernel
).