Source code for gammapy.scripts.spectrum_pipe

# Licensed under a 3-clause BSD style license - see LICENSE.rst
from __future__ import absolute_import, division, print_function, unicode_literals
import logging
from ..spectrum import (
    SpectrumEnergyGroupMaker,
    FluxPointEstimator,
    SpectrumExtraction,
    SpectrumFit,
    SpectrumResult,
)
from ..background import ReflectedRegionsBackgroundEstimator
from ..utils.scripts import make_path

__all__ = ["SpectrumAnalysisIACT"]

log = logging.getLogger(__name__)


[docs]class SpectrumAnalysisIACT(object): """High-level analysis class to perform a full 1D IACT spectral analysis. Observation selection must have happened before. For a usage example see :gp-extra-notebook:`spectrum_pipe` Config options: * outdir : `~gammapy.extern.pathlib.Path`, str Output folder, None means no output * background : dict Forwarded to `~gammapy.background.ReflectedRegionsBackgroundEstimator` * extraction : dict Forwarded to `~gammapy.spectrum.SpectrumExtraction` * fit : dict Forwareded to `~gammapy.spectrum.SpectrumFit` * fp_binning : `~astropy.units.Quantity` Flux points binning Parameters ---------- observations : `~gammapy.data.ObservationList` Observations to analyse config : dict Config dict """ def __init__(self, observations, config): self.observations = observations self.config = config def __str__(self): ss = self.__class__.__name__ ss += "\n{}".format(self.observations) ss += "\n{}".format(self.config) return ss
[docs] def run(self, optimize_opts=None): """Run all steps.""" log.info("Running {}".format(self.__class__.__name__)) self.run_extraction() self.run_fit(optimize_opts)
[docs] def run_extraction(self): """Run all steps for the spectrum extraction.""" self.background_estimator = ReflectedRegionsBackgroundEstimator( obs_list=self.observations, **self.config["background"] ) self.background_estimator.run() self.extraction = SpectrumExtraction( obs_list=self.observations, bkg_estimate=self.background_estimator.result, **self.config["extraction"] ) self.extraction.run()
[docs] def run_fit(self, optimize_opts=None): """Run all step for the spectrum fit.""" self.fit = SpectrumFit( obs_list=self.extraction.observations, **self.config["fit"] ) self.fit.run(optimize_opts=optimize_opts) modelname = self.fit.result[0].model.__class__.__name__ filename = make_path(self.config["outdir"]) / "fit_result_{}.yaml".format( modelname ) self.fit.result[0].to_yaml(filename=filename) # TODO: Don't stack again if SpectrumFit has already done the stacking stacked_obs = self.extraction.observations.stack() self.egm = SpectrumEnergyGroupMaker(stacked_obs) self.egm.compute_groups_fixed(self.config["fp_binning"]) self.flux_point_estimator = FluxPointEstimator( groups=self.egm.groups, model=self.fit.result[0].model, obs=self.extraction.observations, ) self.flux_point_estimator.compute_points()
@property def spectrum_result(self): """`~gammapy.spectrum.SpectrumResult`""" return SpectrumResult( points=self.flux_point_estimator.flux_points, model=self.fit.result[0].model )