PowerLaw

class pyirf.spectral.PowerLaw(normalization, index, e_ref=<Quantity 1. TeV>)

Bases: object

A power law with normalization, reference energy and index. Index includes the sign:

\[\Phi(E, \Phi_0, \gamma, E_\text{ref}) = \Phi_0 \left(\frac{E}{E_\text{ref}}\right)^{\gamma}\]

Attributes:

normalization: astropy.units.Quantity[flux]

\(\Phi_0\),

index: float

\(\gamma\)

e_ref: astropy.units.Quantity[energy]

\(E_\text{ref}\)

Methods Summary

__call__(energy)	Call self as a function.
from_simulation(simulated_event_info, obstime)	Calculate the flux normalization for simulated events drawn from a power law for a certain observation time.
integrate_cone(inner, outer)	Integrate this powerlaw over solid angle in the given cone

Methods Documentation

__call__(energy)

Call self as a function.

classmethod from_simulation(simulated_event_info, obstime, e_ref=<Quantity 1. TeV>)

Calculate the flux normalization for simulated events drawn from a power law for a certain observation time.

integrate_cone(inner, outer)

Integrate this powerlaw over solid angle in the given cone

Parameters:

innerastropy.units.Quantity[angle]

inner opening angle of cone

outerastropy.units.Quantity[angle]

outer opening angle of cone

Returns:

integratedPowerLaw

A new powerlaw instance with new normalization with the integration result.