load_cta_irfs¶

gammapy.irf.load_cta_irfs(filename)[source]¶

load CTA instrument response function and return a dictionary container.

The IRF format should be compliant with the one discussed at http://gamma-astro-data-formats.readthedocs.io/en/latest/irfs/.

The various IRFs are accessible with the following keys:

‘aeff’ is a EffectiveAreaTable2D
‘edisp’ is a EnergyDispersion2D
‘psf’ is a EnergyDependentMultiGaussPSF
‘bkg’ is a Background3D

Parameters:

filename : str

the input filename. Default is

Returns:

cta_irf : dict

the IRF dictionary

Examples

Access the CTA 1DC IRFs stored in the gammapy datasets

from gammapy.irf import load_cta_irfs
cta_irf = load_cta_irfs("$GAMMAPY_DATA/cta-1dc/caldb/data/cta/1dc/bcf/South_z20_50h/irf_file.fits")
print(cta_irf['aeff'])