SkyModels¶

class gammapy.cube.models.SkyModels(skymodels)[source]¶

Bases: object

Collection of SkyModel

Parameters:	skymodels : list of `SkyModel` Sky models

Examples

Read from an XML file:

from gammapy.cube import SkyModels
filename = '$GAMMAPY_DATA/tests/models/fermi_model.xml'
sourcelib = SkyModels.read(filename)

Attributes Summary

`frame`
`names`	Sky model names
`parameters`
`skymodels`

Methods Summary

`evaluate`(self, lon, lat, energy)
`from_xml`(xml)	Read from XML string.
`read`(filename)	Read from XML file.
`to_xml`(self, filename)	Write to XML file.

Attributes Documentation

frame = None¶

names¶: Sky model names

parameters¶

skymodels¶

Methods Documentation

evaluate(self, lon, lat, energy)[source]¶

classmethod from_xml(xml)[source]¶: Read from XML string.

classmethod read(filename)[source]¶

Read from XML file.

The XML definition of some models is uncompatible with the models currently implemented in gammapy. Therefore the following modifications happen to the XML model definition

PowerLaw: The spectral index is negative in XML but positive in gammapy. Parameter limits are ignored
ExponentialCutoffPowerLaw: The cutoff energy is transferred to lambda = 1 / cutof energy on read

to_xml(self, filename)[source]¶: Write to XML file.