Note
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Log parabola spectral model#
This model parametrises a log parabola spectrum.
It is defined by the following equation:
Note that from_log10()
method.
Example plot#
Here is an example plot of the model:
from astropy import units as u
import matplotlib.pyplot as plt
from gammapy.modeling.models import LogParabolaSpectralModel, Models, SkyModel
energy_bounds = [0.1, 100] * u.TeV
model = LogParabolaSpectralModel(
alpha=2.3,
amplitude="1e-12 cm-2 s-1 TeV-1",
reference=1 * u.TeV,
beta=0.5,
)
model.plot(energy_bounds)
plt.grid(which="both")

YAML representation#
Here is an example YAML file using the model:
components:
- name: log-parabola-model
type: SkyModel
spectral:
type: LogParabolaSpectralModel
parameters:
- name: amplitude
value: 1.0e-12
unit: cm-2 s-1 TeV-1
- name: reference
value: 1.0
unit: TeV
- name: alpha
value: 2.3
- name: beta
value: 0.5
metadata:
creator: Gammapy 1.2
date: '2024-02-29T10:21:54.251206'
origin: null